# Questions Asked onApril 2, 2013

1. ## math

1) An antique dresser was purchased for \$7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. 2) a) Find the slope of the secant to the curve f(x) = 0.25(4)^(x) - 2 between: p1) x=0 and x = 1 p2) x=0 and x=0.5

2. ## math

Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately \$0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest dollar. Name at

3. ## physical science 2nd semester

what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)

4. ## Math

Jeremy and Cynthia leave at the same time to travel 75 miles to an area. Jeremy drives 15 miles in 12 minutes. Cynthia drives 26 minutes in 20 minutes. If they continue at the same rates, who will arrive at the area first?

5. ## stats

Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13

6. ## stats.

The amount that airlines spend on food per passenger is normally distributed with mean \$8.00 and standard deviation \$2.00. What is the probability that a randomly selected airline spends more than \$12.50.

7. ## stats.

The mean number of bumped airline passengers per day s 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean number of bumped passengers for the 40 days will be between 1.25 and 1.50?

define waves

9. ## physic

what is a wave?

10. ## health

what can a person do to foster a positive self image?

11. ## physic

Three 30mm diameter cables support the car in a cable elevator. Inside the car is a safety notice. SAFE WORKING LOAD 33 PERSONS 2244 KG The yield stress of the cables is 200MPa. What factor of safety has been applied at the safe working load? Factor of

12. ## math

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane

13. ## Spanish 2

Conjugate Past Tense Resulta que todo el mundo _____ que mi novio me estaba enganando porque el ____ con otra chica y los dos estaban bailando juntos y besandose toda la noche. Choices: decir, tener, querer, poner, saber, poder, and venir I tried different

An object at rest begins moving horizontally on the x-axis, starting at position x(t) = 0 feet at time t = 0 seconds.Suppose, after exactly 2 seconds we measure the position of the object to be 3 feet to the right of the origin AND measure the object to be

15. ## Chem

Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?

16. ## Chem

Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of di-n-propyl ether?

17. ## 7th Grade Language Arts URRGEENT!!!!

What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil ok this question IDK... however I think it's Chile OR Argentina though to be honest idk I've read the book 17 times (i counted) I looked it up in

18. ## Physiology

How does nervous system control the activity of writing

19. ## MAths algebra

A rectangular plot measures 16 meters by 34 meters ,find the distance from one corner of plot to the corner diagnolly opposite Answer is 38 meters

20. ## MAths algebra

Consecutive bases of a square shaped baseball diamond are 90 feet apart .Find to the nearest tength of a foot the distance from first base diagonally across the diamond to third base

21. ## MAths algebra

A diagonal of a square parking lot is 75 meters.Find to the nearest meter, the length of a side of a lot

22. ## maths algebra

Suppose that there is a cube with edges 12 centimeters in length.Find the length of a diagonal from a lower corner to the diagonally opposite upper corner .

23. ## MAths algebra

Suppose that there is a rectengular box with a length of 8 centimeters a width of 6 centimeters and a height of 4 centimeters.Find the length of a diagonal from a lower corner to the upper corner diagonally opposite. Answer is 10.8 centimeters

24. ## algebra!!!!

The population in a town called Atown in December 1900 is a perfect square. In January 1901, 48 people moved in, and the population is 1 more than a perfect square. In February 1901, 48 more people moved in, and the population is a perfect square. Assuming

25. ## GEOMETRY(POLYGON)

A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?

26. ## GEOmetry(Special Coin Placement)

Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?

27. ## physics

I am helping my friend move into his new apartment. During the move, we have to load boxes into the back of his truck. To make it easier to load them, we've set up a metal ramp so that we can slide the boxes up to the deck of the truck. The box shown in

28. ## PROBAbility!!!!

A bag contains 150 balls numbered 1 through 150. Three balls are drawn and placed on the table. The probability that the balls were drawn in increasing order can be expressed as a/b where a and b are coprime positive integers. What is the value of a+b?

29. ## simple PHYISCS

A teenager accidentally falls off a 10 m high platform diving board. His friend whips out his camera and takes a picture when the teenager is halfway to the water below to commemorate the embarrassing event and post it on Facebook. How many seconds after

30. ## PHYSIcs!!!

You want to figure out how fast you can throw a ball, but don't have access to a radar gun. You measure the height from the ground to your hand as you throw and discover that when you throw a ball it leaves your hand at a height of 2 m from the ground. You

31. ## physics...

A kayaker paddles due north at 2 m/s. The river the kayaker is paddling in flows towards the east at 1 m/s. After 5 seconds of paddling, how far is the kayaker from where she started in m?

asked by HELP ME...uRGENT!
32. ## physics

You and your friend, both of mass 70 kg, are playing catch with a frisbee on frictionless ice. Initially, you are both at rest. You throw a 0.175 kg frisbee at 10 m/s horizontally at your friend, who catches it. After they catch the frisbee, what is the

asked by HELP ME...uRGENT!
33. ## physics

block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. When released from rest, block 2 falls 76 cm in 5.2 s (without the cord slipping on the pulley). What is the pulley's

34. ## Math

If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2. Therefore, to find y = sin−1(−3/22, we must find an angle y whose sine is -3/2. There are many possible angles with this sine, but the range of y = sin−1 x is restricted to [ , ] and so y must

35. ## biology

) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table

36. ## DPS

An isotope has a 12.4 hour half life. If it has an activity of 30mCi at noon today, what was its activity at 3 p.m. yesterday?

asked by Gajender Goswami
37. ## machanics

A space aircraft is launched straight up.The aircraft motor provides a constant acceleration for 10 seconds,then the motor stops.The aircraft's altitude 15 seconds after launch is 2 km.ignore air friction .what is the acceleration,maximum speed reached in

38. ## chemistry

Rank these elements according to electron affinity. Br, S, Ne most energy released by gaining an electron: most energy absorbed by gaining an electron:

39. ## Chemistry

The sizes and shapes of the hydrogen atom orbitals was revealed through graphical analysis of the corresponding wave functions. These wave functions also predict areas that the electrons have a zero probability of being found. These areas are known as

40. ## Chemistry

What would be the speed of the following particles if they had the same wavelength as a photon of green light (λ = 500.0 nm)? Proton (mass = 1.673*10^(-24)g) =_____ neutron (mass = 1.675*10(-24)g) =_____ electron (mass = 9.109*10^(-28)g) =_____ alpha

41. ## chemistry

Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth. The rules in that universe are: 1. principal quantum number n = 1, 2, . . . (as on

42. ## Chemistry

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 2.10 nm in diameter? Take the mass of an

43. ## chemistry

The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(-1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons

44. ## chemistry

The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(-1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons

45. ## chemistry

Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the

46. ## Please solve it.Logarithm

Please help me because I do not any idea in Logarithm topic.Solve for the value of X: 6log(x^2+1)=5

47. ## advance functions gr 12

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

48. ## advance functions gr 12

Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x-2(demominator)

49. ## physics

Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.

50. ## physics

Find modulus,Direction cosines,Unit vectors of (1)4a-2b+c,(2)a-7b+5c,(3)4a-3b+c.

51. ## Physics

Mars has a mass of about 6.09x10^23 kg and it's moon Phobos has a mass of about 9.4 x10^15N how far apart are mars and Phobos? The value of the grav constant is 6.673 x10^-11 answer in units of N

52. ## math

Which of the following could NOT represent the intersection of a plane and a triangular prism? A. a triangular prism B.a triangle C. a rectangle D. a point I had D, a point because if you cut a triangle in half you can not get a point out of it. If this is

53. ## Physics

A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is

54. ## Physics

A plane flies horizontally at constant ground speed v=720km/h. The pilot is informed by an air traffic controller that he must immediately change his direction of flight while keeping the same altitude. The pilot performs a turning maneuver by rolling the

55. ## Math

Let f(x)=x2−1. How many distinct real roots are there to f(f(f(x)))=0?

56. ## physics

A space aircraft is launched straight up. The aircraft motor provides a constant acceleration for 10seconds, then the motor stops. The aircraft's altitude 15seconds after launch is 2km. Ignore air friction. Determine (i) the acceleration, (ii)the maximum

57. ## science "Genetics" Mendel

You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male

58. ## World Geography

In any particular culture, an idea or way of doing things that is common to the culture is called a ____________. A. cultural landscape B. culture C. cultural trait D. cultural norm

59. ## physics111

a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the river is 800m wide. (A) what is his velocity(magnitude and direction)relative to the earth? (B)how much time is required to cross

60. ## Biology "Genetics"

Red-green Color Blindness and Hemophilia A are both sex-linked traits in humans. Both genes are on the X-chromosome and are tightly linked. Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both red-green color blind and a

61. ## math

y1=6+2x x1 y1 -3 ? -2 ? -1 ?

62. ## information Literacy

in the subject guide search on edseek's homepage enter the following subject term: paleobotany. Based on the results from this search, choose the best answer to this question

63. ## Math algebraic factprization

1) (x+3)^2 - (x+1)^2 2) (x-4)^2 - 16(x+2)^2

64. ## Math

Algebraic factorization 1) (x+3)^2 - (x+1)^2 2) (x-4)^2-16(x+2)^2 3) 4(x+1)^2 -(2-x)^2

65. ## English

The sure solution to unemployement is a better quality of education

66. ## math

HOW YOU CAN PREPAIR 1M OF SODIUM CHROLIDE IN 250CMCUBE

67. ## MATH

Below are some sale prices for soda .Which offers the best price ? a. 6 for \$1.75 b.8 for \$1.90 c.12 for \$3.15 d.30 for \$7.50

68. ## Math

if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left

69. ## Chemistry

At the normal boiling point of toluene,Δ Hvap=33.2 kJ/mol and ΔSvap= 86.5J/mol•K. What is the normal boiling point of toluene?

70. ## Math

A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a

71. ## pre calculus

1.)A utility company has the following rate schedule for natural gas usage in a city’s business district: Monthly service charge: \$8.80 Per therm service charge 1st 25 therms : \$0.6686/therm Over 25 therms: \$0.85870/therm (a) What is the charge for using

72. ## pre calculus

2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and range. y= -2 lxl +2 For example, if you were asked to graph y= x^2 + 1 using transformations, you would show the graph of y= x^2

73. ## math

A carpenter is building rectangular walls for a room addition. The width of a section of wall is two times the height h. Each section has a brace that connects two opposite corners of the section. What is a simplified expression for the length of a brace?

74. ## Physics

A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How far did the ball travel before it hit the ground? Round the answer to the nearest meter.

75. ## math

A walking path is shaped like a rectangle with a width 7 times its length "l". What is a simplified expression for the distance between opposite corners of the walking path?

76. ## Math

A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a

77. ## advance functions gr12

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

78. ## advance functions gr12

Using rational functions solve (7+ 1)/x = 1/(x-2)

79. ## Physics

Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m. Is the formula F=1/T?

80. ## advance functions gr12 HELP ASAP

using rational functions solve (x+5)/(x-3)= (2x+7)/(x) thank you

81. ## Chem

a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?

82. ## Chem

a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?

83. ## algebra

Can anyone help explain how to work this problem out? One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the

84. ## Physics

The coil in the figure below contains 425 turns and has an area per turn of 3.00 10-3 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The

85. ## Math

A state lottery requires you to choose 4 cards from an ordinary deck: I heart, 1 club, 1 diamond, and 1 spade in that order from the 13 cards in each suit. If all four choices are selected by the lottery, yo win \$5,000. It costs \$1 to play. Find the

86. ## advance functions gr12 (SORRY LAST ONE HAD A TYPO)

Using rational functions solve 7+ (1)/x = 1/(x-2)

87. ## math

how much is 12 quarters?

88. ## algebra

For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,-2_-3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,-2_-3,7] was used to encode a phrase to

89. ## math

A gardener is mowing a 20 yard-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the corner diagonally opposite. What is the length of this pass with the mower? Give your answer in simplified form. Please

90. ## Chemistry

The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol-1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point? Answer I got was 29.2/334.2 = 0.0873.

91. ## college algebra

How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?

92. ## 7th Grade Language Arts~!!!

What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil My Answer: 1) Argentina Is this correct?

93. ## maths

A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is

94. ## math

2y(4y-2) simplify help

95. ## geometry

a point F is at a certain distance from a line AB .Another point P is moving in a plane such that the ratio of it's distance from F and line AB remains constant .find the locus of the point P

96. ## college algebra

f(x)=√x-2 Find the domain of the function is it x-2 the range of function is it (00,-2) the domain of the inverse is it x>-2 The range of the inverse is it (-2,00) Thanks

97. ## advance functions gr12 HELP ASAP

Using rational functions solve 7+ (1)/x = 1/(x-2) thank you

98. ## advance functions gr12 HELP ASAP

use the asymptotes and intercepts to make a quick sketch of the function f(x)= x-2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x-2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)

99. ## Algebra

Find the range of the function rule y = 5x - 2 for the domain D = {-5, -1, 0 2, 10}

100. ## Physics

What is the wavelength of a 512 Hz sound wave in 20 degree C air?

101. ## geography

Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive

102. ## Physics

Joe stands 150 m from the edge of a canyon wall. How long will it take him to hear his echo if the air temperature is 250 degree C?

103. ## advance functions gr12

write an equation for a rational function whose graph has all of the indicated features: -vertical asymptote with equation x=3 -horizontal asymptote with equation y=2 -hole at x=1 no x intercept thank you

104. ## Physics

Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?

105. ## Physics

One way to determine the distance to the moon is to bounce a laser beam off a mirror on its surface. How far away is the moon if it takes 2.56 seconds for the laser to "echo" off the moon?

106. ## 7th Grade Social Studies

1. Which of the following are accomplishments of the Incas? (1 point) pyramids floating gardens hieroglyphics roads and aqueducts 2. All of the following contributed to the Spanish victory over the Aztecs except (1 point) disease wiped out many of the

107. ## chemistry

Write the complete structures (don’t forget the lone-pairs) for the following compounds: C2H5OH; HOCH2CH2NH2; HOCH2CH2NH2; CH3NH2; CH2Cl2

108. ## Calculus

The altitude (in feet) attained by a model rocket t seconds into flight is given by the function h(t) = -1/3t^3 + 4t^2 + 20t + 2,for t _> 2 a)Find the maximum altitude attained by the rocket. b)Why does it not make sense to use this function after t = 16

109. ## Alg 1

Simplifying Radicals A gardener is mowing a 20-yd-by-40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the cxorner diagonally opposite. What is the length of this pass with the mower? Give your answer in

110. ## physics

A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?

111. ## Calculus

If a company’s sales (in millions of dollars) for time t months is given by f(t) = 0.003t^3 + 0.5t^2 + 2t + 3 a. Find f'(t). b. Find f'(5). c. What does this tell you about the company’s position in the month of May (i.e.,t = 5)?

112. ## math

If line 1 passes through (2, -6) and (-2, -2) and line 2 passes through (-3, 2) and (2, 12), where will line 1 and line 2 intersect? a)(-4,0) b)(-2,-3) c)(-6,2) d) (-2,-2)

113. ## math

Look at the revenue for videos rented (v) on a given day at two different video rental stores below r = 2v + 10 r = 1.6v + 18 After how many video rentals will the revenues of both stores be equal? a)25 b)45 c)70 d)20

114. ## Maths

How many ordered sets of positive integer triples (a,b,c) are there such that a+b*c=100

115. ## Math

David and Joseph have a total of 328 marbles. Matthew and David have 176 marbles. Joseph has 5 times as many marbles as Matthew. How many marbles does Davis have?

116. ## math

if i had 7 bags of sand that were 2/3 full and i had 14 pounds of sand how much would it take to fill each one?

117. ## Biology

I'm doing a lab for gel electrophoresis and we added the digests in the wells of the agarose gel Lane 2 – λ Hind III (a standard) Lane 4 – Tube 1 Lane 5 – Tube 2 Lane 6 – Tube 3 Lane 7 – Tube 4 Now will DNA in tube 1 which only has dh20, 10x

118. ## Maths

The vertices of a cube are labeled with the numbers 0,1,2,3,4,5,6 and 7, such that no two vertices are labeled with the same number. The sum of any 2 numbers on an edge is prime. What is the maximum sum of the 4 numbers on a face?

119. ## Physics

Two lenses are in contact. One of the lenses has a focal length of +10.0cm when used alone. When the two are in combination, an object 20cm away from the lenses forms a real image 40cm away from the lenses. What is the focal length? I am not sure how to

120. ## Physics

Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?

121. ## Maths

Suppose Z=a+bi , where a and b are integers and i is the imaginary unit. We are given that |1+iZ| = |1-iZ| and |Z-(13+15i)|

122. ## Physics

What is the wavelength of a 512 Hz sound wave in 20 degree C air?

123. ## Physics

What is the frequency of a wave that has a period of 5.0 seconds?

124. ## Applied Calculus

For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your

125. ## Armwood

Abby’s bus left at 2:00, going southbound at 55 mph. Bob’s went northbound starting at 3:00, going only 45 mph. How long will it take for them to get 420 miles apart? Round to the nearest tenth if necessary

126. ## math

Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane

127. ## Chemistry

At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.64 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium. SO2(g)

128. ## math

find the exact value of [sec(-30 degrees)- cot 120 degrees]/1-cosec^2(45 degrees) Find the exact value of [sin^2(355 degrees) + cos^2 (355 degrees)]/ tan^2 (30 degrees)

129. ## Chemistry

Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g) is injected into an empty 4.75 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at

130. ## Chemistry

At a certain temperature, the Kp for the decomposition of H2S is 0.755 H2S (g) H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.201 atm in a closed container. what is the total pressure in the container at equilibrium?

131. ## Chemistry

If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq) -->

132. ## Chemistry

At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. The balanced chemical equation is N2+O22NO. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after

133. ## maths-statistics

The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8

134. ## life orientation

Human and environmental factors that causes ill-health,sickness,trauma,accidents,crises and disaster

135. ## science

Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).

136. ## Physics

An iron railroad track 1000 feet long is at a temperature of 0 oC. How much does it expand when heated to 33 oC?

137. ## math

A rectangular room has an area of 120ft squared. Marge drew a scale drawing of the pool using the scale 1.5cm=2ft. What was the area of the scale drawing? a) 213.3cm2 b) 67.5cm2 c)53.3cm2 d)1.5cm2 I don't think any of the choices match the answer (90cm2)?

138. ## MAth

14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?

139. ## MAth

14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?

140. ## Chemistry

Calculate the mass of 0.0122 moles of: a) Si3N4 b) (CH3)3 N

141. ## calculus

An airplane is flying at a velocity of 300km/h S30degrees W in a wind blowing at a velocity of 50km/h S20degrees E. What is the true speed and direction of plane?

142. ## SCIENCE/ECOLOGY

I NEED HELP IN PREPARING A DEMOPRAPHIC AND ENVIRONMENTAL TIMELINE WHICH INCLUDES DEATH RATES, BIRTH RATES, POPULATION CHANGES, AND MAJOR HISTORY CHANGES

143. ## maths-statistics

If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is

144. ## life Orientation

ways in which you critically discuss how life style/behaviour diseases impact on the teenage

145. ## agriculture

outline and explain the objectives of fencing a farmland

146. ## geometry

n the xy -plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?

147. ## agriculture

what are the important features of a building which could be used as a milking shed(parlour),dairy(milk room) and food store to ensure production of clean fresh milk?

148. ## physics

A 75.0 kN truck is parked in the middle of a 20.0 m long bridge. How much force must each end of the bridge exert to support the truck?

149. ## agriculture

state and explain what records should be kept for the efficient management of a dairy herd

150. ## maths-urgently needed

If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is

151. ## Math 7

What type of angle is angle x is clock is used to display the time of 7:15. Each minute represents 6 degrees A. Obtuse B. Acute C. Straight D. Right

152. ## agriculture

explain how any three of the records which are kept for the efficient management of a dairy herd be used to improve management

153. ## Genetics part b only

You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male

154. ## physics

A uniform, 264-N rod that is 2.05 m long carries a 225-N weight at its right end and an unknown weight W toward the left end. When W is placed 47.9 cm from the left end of the rod, the system just balances horizontally when the fulcrum is located 82.7 cm

155. ## English

Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the

156. ## agriculture

name one intensive and one extensive system of poultry farming

157. ## Chemistry

A student dissolved the KHP in 100.0mL of water instead of 50.0mL. Will the molar concentration of the NaOH solution determined from titrating be greater, less than, or unaffected by this mistake? Explain.

158. ## 8th Math - Probability

A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is not replaced. What is P(orange, then orange)? I know the answer. It's 42/552. But HOW do I figure this out? I can do the first

159. ## chemistry

how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?

160. ## Chemistry

Can the reaction 2Ni(s)+MgSo4(aq) occur.Explain why?

161. ## Statistics

Two cards are drawn from an ordinary deck of cards, and the first is not replaced before the second is drawn. What is the probability that one card is an ace and the other is a king

162. ## Alg 1

An area rug is shaped like a golden rectangle. Its length is 8 ft. What is the rug's width? Write your answer in simplified radical form and rounded to the nearest tenth of a foot. Please explain how to work this. Thanks.

163. ## Chemistry

Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. mono-unsaturated fat c. poly-unsaturated fat

164. ## Math

What is 120.06 / 24? We started a new unit, dividing decimals and I find it hard to understand.

165. ## Math

A computer technician keeps track of his earnings throughout each month. the technician observes that his earnings are a linear function of the number of hours he works during the month. The technician finds that when he works 55 hours during the month, he

asked by Jayson Angole
166. ## math

Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your

asked by Jayson Angole
167. ## Science

Abiotic means non living Biotic means living The following list is to enter into a Venn Diagram where the circles are labeled Abiotic and biotic whale is biotic clock is abiotic water is abiotic fish is biotic paper is both glass is abiotic aluminum is

168. ## Finite

The quantity demanded each month of Russo Espresso Makers is 250 when the unit price is \$136. The quantity demanded each month is 1000 when the unit price is \$106. The suppliers will market 750 espresso makers when the unit price is \$72 or higher. At a

169. ## math

which shape will create tessellation using only translations? A. scalene triangle B. regular hexagon C. equilateral triangle D. isosceles trapezoid

170. ## math

A lab needs a 20 liters of a 15% acid solution. The lab only has a 10% acid solution and a 30% acid solution. How much of the 10% acid solution will they need to mix with the 30% solution to obtain 20 liters of a 15% solution?

171. ## math

A box contains 4 red pencils, 3 blue pencils, and 3 yellow pencils. What is the probability that a student randomly selects a blue pencil, keeps it, then a second student randomly selects a yellow pencil? A. 1/10 B. 3/10 C. 6/10 D. 9/10

172. ## math

Which statement is true? A. All vertical lines have a slope of zero. B. All vertical lines have a slope positive slope. C. All vertical lines have a negative slope. D. All vertical lines have a undefined slope. WHY?

173. ## chemistry

the equilibrium constant for the synthesis of HBr(g0 from hydrogen and bromine gas is 2.18*10 exponent 6 at 730 degrees celcius.if 3.75 mol of HBr(g) is put into a 15L reaction vessel,calculate the concentration of H2,Br2 and HBr at equilibrium

174. ## Earth science

Waste produced by people along the East Coast of the United States has been dumped into the Atlantic Ocean where it is distributed by surface ocean currents. Which coastal area is most likely to become polluted by this waste?

175. ## Earth science

Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?

176. ## la

shoud students who fail their classes be retained and have to repeat the grade ?

177. ## la

shoud students who fail their classes be retained and have to repeat the grade ?

178. ## math

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

179. ## math

If Jo is supposed to read one-half of a 100-page book for an English assignment and she has finished 38 pages, what percent of the assignment does she have left to do? Please answer and explain.

180. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

181. ## math

Emily,Zeke,Harry,& Brook each conducted surveys on the number of books people have in their homes. Then they answered the question below. "MUST ALL MEASURES OF CENTRAL TENDENCY APPEAR AS A NUMBER IN A SET OF DATA COLLECTED? A. Emily says this is always

182. ## STATs 353

Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 68,58,64,62,58,67 After 40,42,46,37,45,38 Lower limit: Upper limit:

183. ## social studies

How are the governments of Israel and Saudi Arabia different? How do you think this affects the daily lives of people who live in these countries? I don't know what to put What do they mean?

184. ## Find the domain, range and horizontal asymptote

Find the domain, range and horizontal asymptote f(x)=2^-x-2

185. ## math

Students submitted pictures for the school yearbook. Only 4/5 of the submitted pictures fit in the yearbook. There were 105 pictures that did not fit. Approximately how many total pictures were submitted for the yearbook? A. 105 B. 210 C. 420 D. 500

186. ## Algebra 1

The student council is buying school T-shirts to sell during a fundraiser. The cost (y) of school T-shirts is a linear function of the number of T-shirts bought (x). The student council can buy 100 T-shirts for \$825 and 300 T-shirts for \$2,425. Write an

187. ## math

How do you find 60% of 20?

188. ## Physics

A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in

189. ## Math

Lou eats 6/8 of a pizza. What fraction of pizza is left over?

190. ## math

Max,Owen,Elise, and Cara went to a school carnival. They each played the dart throw,ring toss,water shoot,and basketball throw. Each student won a different game. CLUES:*Max didn't score any points at the dart throw. * Elise correctly tossed 2 rings, but

191. ## math

What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

192. ## math

Between which two consecutive integers is the value of this irrational number? square root of 117? A. 8 and 9 B. 10 and 11 C. 14 and 15 D. 20 and 21

193. ## social studies

1.Israel is much smaller in land area than Saudi Arabia, but it is the center of more conflict over land ownership.Why do you think this is the case? Because most people live along the coastal plain in Israel and the eastern interior is dry and includes

194. ## Math HELP!!!

The booster club sold tickets to a high school basketball game. They sold 700 student tickets and 500 general admission tickets, and raised a total of \$5000. The combined cost of one student ticket and one general admission ticket was \$8. The equations and

195. ## Math

1.During the last 5 shifts, Gary delivered 9,8,14,17, and 12 pizzas. What is the mean number of pizzas delivered during a shift? 12 2.Stephie's science experiment produced the following results:183,204,179,191,186.What is the range? 26 3.What is the mode

196. ## Algebra 1B

A painter can use the formula A=2/3bh to estimate the Area of space under the parabola, where b is the length of the base and h is the height from the base to the vertex. Calculate the area, in square feet under each arch.

asked by Frank J
197. ## Math - Please Answer ASAP

A 182 cm tall man is digging a hole in the ground. He stops for a moment and says: "I am done with one quarter of the hole. When I finish the job the top of my head is going to be three times as far under the ground as far it is above the ground now." How

198. ## chemistry

The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?

199. ## math

What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

200. ## MATH!!

Andy, Barbara and Chrisy play a game. Their probabilities of winning are 1/2, 1/3, and 1/6 respectively. What is the probability that each wins exatly one of the first three games played? Express your answer as a common fraction.

201. ## Math

1A piece of fabric 3/10 of a meter long was but from a bolt that held 9/10 of a meter of fabric.How much fabric was left on the bolt? Express your answer in simplest terms 7/10 2Add.Simplify 5 3/16+2 7/16 7 5/8 3Subtract.Simplify 5-2 1/2 I don't know how

202. ## Domain of composite function

Find the domain of the composite function fog. f(x)=x^2+3;g(x)=sqrtx-4

203. ## General(dont know actual subject)

My project is research based... I chose plastic surgery.... Question is: why have you chosen this task? ( in the box below write a paragraph explaining why you have selected your particualar task idea.) I really cant think of why i chose plastic surgery

204. ## Math

16.Four students are in line to perform in the talent show. Sally is ahead of Kevin. Marcus is behind Kevin. Sally is behind Jenny. Who is first in line Jenny

205. ## Math

Coach Hank has two children. Her daughter is twice as old as her son. The sum of their ages is 15. How old is her son? 5

206. ## Math

The basketball team scored 38,48,42, and 38 points in four games. What was the average points scored 41 Find the median of the data set 59 64 42 51 55 55 The noon temperature for last four days were 62 58 70 and 66. What was the range and mean range is 12

207. ## English comp

I am trying to turn a poem into prose and I am totally lost. Can some help me if I send them the poem?

208. ## chemistry

If a 1.59 mole sample of argon occupies 3.07 L at constant temperature and pressure then what volume will 4.35 moles of argon occupy at the same conditions?

209. ## Physics

A spring with a spring constant of 35.0 N/m is attached to diﬀerent masses, and the system is set in motion. What is the period for a mass of 34 g? Answer in units of s

210. ## math

find mean median and mode of 10 1 10 15 1 7 10 10 1 6 13

211. ## chem

the volume of 0.220 mol of an ideal gas at 34°C is increased isothermally from an initial volume of 12.0 L. If the final volume is 21.5 L, calculate the entropy change for the process.

212. ## math

in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?

213. ## Chemistry 111

Write the conjugate acid for each of the following: a. HCO3^1- ____________________ b. H2O ____________________

214. ## BIO

If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified? I am pretty sure I cannot use 2^n (n equals the number of amplification cycles)because I don't have a single molecule of starting DNA template.

215. ## Physics

The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = -15.9 µC.

216. ## Chemistry 111

Write the conjugate base for each of the following: a. HPO4^-2 ____________________ b. H2O ____________________

217. ## Physics

A force of 2000N is used to push a box up am inclined plane that is 15m long. If the 100 kg box is raised to a height of 8m,how much work is done against friction ?let g=10m/s^2.

218. ## Chemisty!

How many milliliters of concentrated ammonia, 15 M NH3, would you dilute to 250 mL to produce 0.162 M NH3?

219. ## Chemistry 111

a) Write Bronsted acid-base equilibrium equations for the following: b) Show the acid-base conjugated species, labeling all species (1) HSO4- + C2O4-2 (2) HPO4-2 + NH4+

220. ## Math

Find the mode of the data set 48 52 29 38 29 36 42 29 Charlotte read five books with the following number of pages 185,212,146,165,and 197. What was the mean number of pages in the books 181 Enochs scores on seven tests were 85 68 91 75 82 79 and 93 What

221. ## Math

Point A represents what fraction 0 1/8 2/8 3/8 4/8 A 6/8 7/8 1 5/8? Write a symbol > < or = to compare the fractions 3/4___17/20 < Add. Simplify 3 5/8+2 2/3 1 7/24

222. ## Math

Paula invested into two accounts; one pays 5% simple interest and the other 6% simple interest. She invested \$3000 more in the account paying 6% than in the other account 5%. At the the end of the first year, Paula total return was 730. How much did she

223. ## math

Please help 1. 3 x (8 + 5) + 2 2. 9 x (8 / 4 x 5) By the way / means dividing

224. ## Math 112

Can you use the numbers 1 - 9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?

225. ## math

in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?

226. ## chemistry

How many milliliters of commercial hydrochloric acid, which is 11.6 M, should be used to prepare 6.94 L of 0.52 M HCl?

41/2+21/2

228. ## Chemistry

What is the effect of aqeour ammonia on (NH4)2SO4.FeSO4.6H2O?

229. ## Math

Paul baby sat for 4 1/5 hours on Friday and 2 1/4 hours on Saturday how many more hours did he baby sit on Friday 1 19/20

230. ## Public Speaking

1. When your speech adds to your listeners’ knowledge, it is meant to: A. inform. B. persuade. C. entertain. D. celebrate. is it A 2. In choosing a topic for your first speech, it is wise to: A. ask advice from others. B. start with what you know. C.

231. ## chemistry

Calculate the new molarity when 150 mL of water is added to 125 mL of 8.55 M HBr.

232. ## math

find the ratio of the circumference 44ft to the diameter 14ft of a circle. write answer as a fraction in simplest form

233. ## help making equations

Superbats, Inc., manufactures two different quality of wood baseball bats, the Wallbanger and the Dingbat. The Wallbanger takes 8 hours to trim and turn on a lathe and 2 hours to finish it. It has a profit of \$17. The Dingbat takes 5 hours to trim and turn

234. ## Public Speaking

1. Effective public speaking is: A. audience-centered. B. message-centered. C. speaker-centered. D. channel-centered. is it A 2. When a speech attempts to influence the audience s beliefs, attitudes, and opinions about something, it is generally meant to:

235. ## Philosophy

True or false 1.Friedrich Schleiermacher argued that to understand the meaning of the Bible or any other text, it is necessary to consider the time and place of its author(s), and to ascertain the intention of the author(s) in producing the text. True

236. ## Pre calc

Given the (x,y) coordinates of a point are (-1,-2) find 2 different (r, feta) coordinates? one with r > 0 and one with r< 0. a. Feta between zero and 2pie b. Feta between negative pie and pie c. Feta between 2pie and 4pie

237. ## Math

What is a attribute?

238. ## Chemistry

Urgent... Someone please help!! Can someone please check to see if I am doing these correctly, I have a test tomorrow... Thank you :) Q) Calculate the new molarity of a 35mL sample of 0.450 M CaCl2 solution that is diluted with enough water to make 250 mL

239. ## physics

7. No work is done by gravity on a bowling ball resting or moving on a bowling alley because the force of gravity on the ball acts perpendicular to the surface. But on an incline, the force of gravity has a vector component parallel to the alley. Discuss

240. ## public Speaking

1. Which of the following is a demographic characteristic of an audience? A. Size B. Lifestyle C. Gender D. Values is it C 2. When speaking about the awareness of breast cancer, the most important thing to consider when analyzing your audience is: A.

241. ## Math

The sunglasses that Ramon wants to buy are 50% off the original price of 85\$ .How much did he have to pay?

242. ## Vocabulary

Researchers who study this have come up with some [convincing] exanples. In this sentence, the word convincing means: A) interesting B) persuasive C) expected D) humorous Check: B. persuasive

243. ## Public speaking

Attitudes, beliefs, values, and motivation are characteristics of: A. psychographics. B. demographics. C. the speaker’s profile. D. the audience’s response to the speech. is it B 2. Nicole was asked to speak to the French Club about her trip to

244. ## hodges

which has the largest radius K, Ca, K+ or Na?

245. ## Algebra

A rock is dropped from a riverbank that is 4 feet above the surface of the river. After how many seconds does the rock hit the surface of the water? At highest?

246. ## public speaking

1. A speaker talking about the benefits of cosmetic surgery to an audience primarily of women is appealing to which level of needs in Maslow’s Hierarchy of Needs? A. Physiological needs B. Esteem needs C. Belongingness and love D. Safety needs.. is it B

247. ## chemistry

ch4(g)+nh3(g) translate into words help!

248. ## Math

One half of 9.76

249. ## stats

Question Part Points Submissions Used The number of ships to arrive at a harbor on any given day is a random variable represented by x. The probability distribution of x is as follows. (Give your answers correct to two decimal places.) x 10 11 12 13 14

250. ## Math

What property is this? 4(7+9)=(4x7)+(4x9)

251. ## Physics

The earth's Field is Roughly equivalent to an axial centered dipole. Find the vertical rate of change of the vertical component of the earth's field in gammas/foot here at flagstaff. Given" vertical component of earth's magnetic field at flagstaff is equal

252. ## Math

Need help on the question below. Which of the following questions is best suited for an experiment? a. what conditions do peppers need to grow? b. do peppers grow taller with 10ml of daily watering or with 15ml of daily watering c. what conditions do

253. ## Physics

You are standing on a beach and 5 wave crests land on shore in 50 seconds. Each wave is 32m apart. Find Frequency, period, wavelength and speed.

254. ## math

one gallon of paint will cover 200 squar feet of wall. the room has walls 7.5 feet high. what is the greatest lengh of wall that can be covered by one gallon of paint?

asked by dylan lopez
255. ## Physics

Three forces act on an object at the same time. F1 = 10.0 N 50.0degrees north of east, F2 = 15.0 N 25.0degrees south of west, and F3 = 15.0 N 38.0degrees east of south. What is the magnitude and direction of the net force?

256. ## Math

Need help with one more question. Which best describes a statistical question? a. a question that contains numbers b. a question about numbers c. a question about designing an experiment d. a question about a population or sample. I was thinking it might

257. ## Math

A stock opened at 62 1/4 points and closed at 57 5/8 points. Find the change in the stock price 4 10/16

258. ## Physics

Three forces act on an object at the same time. F1 = 100. N at 30.0degrees north of east, F2 = 200. N at 45.0degrees north of west, and F3 = 100. N at 30.0degrees east of south. What are the magnitudes and direction of both the resultant force and

259. ## English

American Life, stereotypes? Just like television, commercial, etc. When we are watching TV, it gives us a "snapshot" of American life. If you look at the commercials alone, what would this tell you about how we live? I ask you to pretend that you are from

260. ## math

random sample of 9600 students. Multistage design effect similar to an SRS (for those still in school) 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a

261. ## math

T and S share a digital music player that randomly selects songs to play. Together T and S have loaded 3476 songs. T and S want to know if each have loaded a different proportion of songs. When in random-selection mode, 22 of first 30 songs selected were

262. ## Math 1 question

solve for c : 5c/6 + 1/2 = c/4 Please help, thanks :)

263. ## math

10cm^3 of a normal specimen of human blood contains 1.2g of hemoglobin. How many grams does 47cm^3 of the same blood contain?

264. ## government

which of the following determines who holds the position of speaker of the house?

265. ## Algebra 2

4t^2-4/9(t+1)^2 * 3t+3/2t-2

266. ## math

A long distance trucker traveled 300 miles in one direction during a snow strm. The return trip in rainy weather was accomplished at double the speed and took 5 hours less time. What was the speed going?

267. ## algebra 1

The length of a rectangle is 4m more than the width. The area of the rectangle is 45 m squared. Find the length and width. Please help!

268. ## government

which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress

269. ## MATH

Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5 hours. How long would it take them to mow the lawn together?

270. ## government

congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers

271. ## Chemistry

How much 1.0 M NaOH would be required to completely neutralize 40.0 mL of 0.60 M HCl?

272. ## Chemistry

4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl

273. ## math

sonya spent 2/5 of her money and then had \$18 left. how much money did she originally have?

274. ## Chemistry

1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration.

275. ## Chemistry

Some antacid tablets actually contain a mixture of calcium carbonate and magnesium hydroxide (though they usually have the same “strength” as those that only contain CaCO3). If this had been the case for the antacid you tested, but you still assumed it

276. ## Chemistry

You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?

277. ## math

you are looking for a safe place to put 30,000.00 for one yr. Bank A offers 2.46% interest rate continuously. Bank B offers 2.48% quarterly and Bank C offers 2.47% monthly. Find the most effective rate of each to determine which would earn you the most

278. ## government

what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a

279. ## Chemistry

How do you calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25 degrees C? The complete ionic equation is: Ba2+(aq) + 2OH-(aq) + 2NH4+(aq) +

280. ## math

Identify the initial value and growth or decay factor in each of the following exponential functions: a) y= 350 x 5^x b) Q= 25000 x (1/2)^t c) P=(7 x 10^3) x 4^t d) N= 5000 x (9/10)^t

281. ## Math

Triangle Lmn is similar to triangle xyz. Triangle LMN has a side of 5 and 3. The scale factor of triangle Lmn to triangle xyz is 2:5. What is triangle xyz's length? Helppppp Meeeeeeeeeee!!!

282. ## math

When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the trains moves at 30.0 m/s, and the observer hears a beat frequency of 3.6 beats per second.

283. ## math

the length of a photograph is 1 cm less than twice the width. the area is 28 cm squared. find the dimensions of the photograph.

284. ## precalculus

Evaluate the following expressions. Your answer must be an angle in radians and in the interval [(-pi/2),(pi/2)] . (a) sin^(-1)(0) = (b) sin^(-1)((-sqrt3)/2) = (c) sin^(-1)(-1/2) =

285. ## geometry

Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?

286. ## finite math

What is the present value of an ordinary annuity which has payments of \$1100 per year for 19 years at 5% compounded annually.

287. ## math

a) A linear function f(t)=b + mt has a slope of -4 and vertical intercept of 20. Find its equation. b) An exponential function g(t)=Ca^t has a decay factor of 1/4 and an initial value of 20. Find its equation. Plot both functions

288. ## Chemistry 2

A titration is performed by adding 0.124 M KOH to 40 mL of 0.159 M HNO3. a) Calculate the pH before addition of any KOH. b) Calculate the pH after the addition of 10.26, 25.65 and 50.29 mL of the base.(Show your work in detail for one of the volumes.) c)

289. ## math

Subjects were asked to taste two wine samples in sequence. Both samples given were the same wine although subjects were expecting to taste two different samples. Of the 32 subjects in the study, 22 selected the wine presented first when presented with two

290. ## math

Jeremiah made a pitcher of iced tea. Which is most likely the capacity of the pitcher?

291. ## English/writinh

Im having a hard time starting my introduction for my essay. I already wrote my thesis statement which is: " In Nathaniel Hawthorne’s, The Scarlet Letter, it suggests that one must find their own internal strength and strive for individual redemption by

292. ## cal

a rancher has 4000 feet of fencing for constructing a rectangular corral. one side of the corral will be formed by a barn and requires no fence. three exterior fences and 2 interior fences partition the corral into 3 rectangular regions. what dimension of

293. ## Science

How many grams of CaCl2 are required to prepare 2.00 liters of 7.00 M CaCl2?

294. ## math

find the solution of the following system of equations x-y=0 x+y=4

295. ## math

George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?

asked by reyna German
296. ## math

George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?

asked by reyna German
297. ## math 141

Three machines turn out all the products in a factory, with the first machine producing 40% of the products, the second machine 35%, and the third machine 25%. The first machine produces defective products 12% of the time, the second machine 3% of the time

298. ## Physics 2

Light with λ = 530 nm passes through a single slit and then illuminates a screen 9.0 m away. If the distance on the screen from the first dark fringe to the center of the interference pattern is 3.20 mm, what is the width of the slit?

299. ## physics

c). at what speed does it hit the ground? d). what total length of time is the ball in the air

300. ## science

if a ball that has a density of 1.17 g cm3 placed in the beaker, where will the ball come to rest

301. ## chemistry

At 10°C below the melting point of aluminum, 0.08% of the atom sites are vacant. At 484°C only 0.01% are vacant. Given this information, determine the energy of vacancy formation (ΔHv) for aluminum. Energy of vacancy formation (in joules / vacancy):

302. ## chemistry

Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell - it helps.) Radius (in centimeters):

303. ## chemistry

An activationenergy of 2.0 eV is required to form a vacancy in a metal. At 800°C there is one vacancy for every 10-4 atoms. At what temperature will there be one vacancy for every 1000 atoms? Temperature (in degrees Kelvin): unanswered

304. ## Math

I need to verify this equation and I get stuck after trying everything I can think of. Help! cos(4x)=4[sin(x)cos(x)-sin^3(x)cos(x)]