# Questions Asked onJanuary 20, 2013

1. ## physics

A 5-kg crate is resting on a horizontal plank. The coeï¬ƒ- cient of static friction is 0.5 and the coeï¬ƒcient of kinetic friction is 0.4. After one end of the plank is raised so the plank makes an angle of 25 with the horizontal, the force of

2. ## chemistry

What mass of lead (ii) trioxonitrate(v) would be required to yield 9g of lead(ii)chloride on the addition of excess sodium chloride(pb=207,N=14,O=16,Na=23,cl=35.5)

3. ## Trig

Find the point on the terminal side of θ = three pi divided by four that has a y coordinate of 1. Show your work for full credit.

4. ## Math

A 5.0 m tree is leaning 5° from the vertical. To prevent it from leaning any farther, a stake needs to be fastened 2 m from the top of the tree at an angle of 60°with the ground. How far from the base of the tree, to the nearest metre, must the stake be?

5. ## physics

Two forces who's resultant is 10N,are perpendicular to each other if one of them make an angle 60 degree with their resultant. Calculate its magnitude.

6. ## math

a soccer ball is kicked from the ground. after travelling horizontal distance of 35m,it just pass over a 1.5m tall fence before hitting the ground 38m from where it was kicked. Determine the equationi of a quadratic function that can be used to model the

7. ## Math

A jet flew from Tokyo to Bangkok, a distance of 4800km. On the return trip the speed was decreased by 200km/h. If the difference times of the fights was 2 hours, what was the speed from Bangkok to Tokyo.

8. ## Earlychilodhood education

Kayla is 18 months old. She looked at Mrs. Crenshaw and said, "seblisboo." Mrs. Crenshaw did not understand any of what Kayla said, but her best response would be: A. "Say that again slowly." B. "Did you want to go outside?" C. "Speak clearly. I can't

9. ## math- plz help

The denominator of a fraction is greater than its numerator by 9. If 7 is subtracted from both its numerator and denominator, the new fraction equals 2/3. What is the original fraction?

10. ## Trig

The point P(3, 4) is on the terminal side of θ. Evaluate tan θ. 3/4 3/5 4/3 4/5

11. ## maths

A farmer has 100metres of wire fencing from which to build a rectangular chicken run.He intends using two adjacent walls for two sides of the rectangular enclosure. Detrmine a formula for the enclosed area in terms of x

12. ## Earlychilodhood education

If we put this ice cube out in the sun, what do you think will happen?" This is a/an __________ question. A. explanation B. divergent thinking C. observation D. convergent thinking

13. ## Math - logs

the log(10^ -1)of 3.66 = of 9.86 = of -2.8 = please help. (the 10^-1 is the subscript to log)

14. ## Chemistry

If the equilibrium concentrations are [PCl5] = 1.0M, [Cl2] = 0.10M, what is the equilibrium constant value? PCl5(g) PCl3(g) + Cl2(g) Would you mind showing the calculations Please. I've been working on this problem over an hour now. Not certain if I am

15. ## Physics

Two metallic wires of the same material have the same length but cross-sectinal area is in the ratio of 1:2.they are connected in 1)-series 2)-parallel. Compare the drift velocities of the electrons in the two wires in both the cases. Plzz help

16. ## Math

A hot air balloon is observed from two points A and B on the ground A and B are 800 feet apart the balloon is east of both points the angle of elevation from A to the balloon is 37 degrees and the angle of elevation from B is 65 degrees what is the

17. ## maths

A farmer has 100metres of wire fencing from which to build a rectangular chicken run.He intends using two adjacent walls for two sides of the rectangular enclosure. Detrmine a formula for the enclosed area in terms of x

18. ## physics

An equipotential surface that surrounds a point charge q has a potential of 516 V and an area of 1.01 m2. Determine q

19. ## chemistry help plz

benzene ring-N-H-CH3 H \ N-benzene ring / CH3 select the class of compound from the choice below. 1-acetal 2-alcohol 3-alkene 4-amide 5-amine 6-carboxylic acid 7-ester 8-haloalkane

20. ## Physics

The focal length of the objective of a telescope is 0.2 m and the eyepiece has a focal length of 1.6 m. What is the length of the telescope? A. 1.8 m B. 1.4 m C. 1.6 m D. .90 m E. 8.0 m

21. ## Statistics

3 balls are drawn successively from a box containing 6red,4 white and 5 blue balls.Find the probability that they are drawn in order red,white and blue if:(a)each ball is replaced.(b)balls are not replaced

22. ## Math help

Complete the table to determine the balance A for \$20,000 invested at rate r = 6% for t years, compounded continuously. chart looks like this: t 10 20 30 40 50 A ___ ___ ___ ___ ____ I need to answer A

23. ## Earlychilodhood education

Karen asked, "Where does rain come from?" The best response for her teacher is: A. "The clouds." B. "I don't really know, Karen." C. "How could we find out where rain comes from?" D. "That's really hard to understand, Karen."

24. ## structure and function of the human body

With your understanding of bone and muscle tissue (cells and the extracellular material) discuss two lifestyle factors (one for bone and one for muscle) that affect the growth, development, size and/or healing (positively or negatively) of the tissue. Also

25. ## PHI 103

Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed

26. ## math: standard deviation

Calculate the standard deviation for the following yields of corn: 142, 161, 132, 143, 147, 145, 146, and 152 bu/ac. Are all yields obtained within one standard deviation of the mean?

27. ## Math

A picture must be hung on a wall were the distance from the floor to ceiling is 8 feet. The center of the picture mist be 5 1/4 feet from the floor. Determine the distance from the ceiling to the top of the picture frame How do I do this solve this?

28. ## Gen Chem II

A gas-forming reaction produces 1.60 m3 of gas against a constant pressure of 127.0 kPa. Calculate the work done by the gas in joules. Please explain. Thanks!

29. ## Precalc

A tower is supported by a guy wire 610 ft long. If the wire makes an angle of 69 degrees with respect to the ground and the distance from the point where the wire is attached to the ground and the tower is 125 feet. a) State if the law of sines or cosines

30. ## Math

The CN Tower in Toronto, Canada, is the tallest free-standing structure in North America. A woman on the observation deck, 1150 ft above the ground, wants to determine the distance between two landmarks on the ground below. She observes that the angle

31. ## graphs in math

C varies inversely as J. If C = 7 when J = 0.7, determine C when J = 12

32. ## MMSS

the volume of 500g sealed packet is 350 cubic centimeters. Will the packet float or sink in the water if the density of water is 1 gm per cubic meter ? What will be the mass of water displaced by this packet

33. ## MAth help plz..

a rectangular prism has the 3 sides measuring x-1, x-1 and 2x+2 centimeters. Create a simplified equation to represent R, the ratio of the surface area to volume. State any logical restrictions on x.

35. ## Chemistry

Calculate the mass concentration of H2SO4 in a solution of 36%, with density 1.84g/cm3

What are objects that are between 5 centimeters to 8 centimeters long?

37. ## MATH

Find the solution/point of intersection of the following quadratic-linear system. Show steps appropriately: y+x^2=-6x-3 and x+y-1=0. Solve using both an algebraic and graphical method.

38. ## Earlychilodhood education

Which one of the following is probably NOT one of the reasons that circle times fail? A. The space was large and open. B. The songs were repeated daily. C. The time period lasted too long. D. The teacher read a chapter book, hoping to encourage the

39. ## math 11

Current price is \$100, current salesbare 5000 units. For every increase in price of \$1, sales decrease by 20 units. Find optimum revenue.

40. ## Tran

What will happen to the time of collision if you add weight to a cart but keeps its speed the same and send it rolling down a incline towards a force sensor?

41. ## functions

Given r, x, y, θ of a triangle, solve for the missing parts. a. r = 13, x =–5; b. x = 7, y = –11; c. θ = 133˚ and r = 44.

42. ## MATH HELP!!!

Given: A is 20˚, b = 50 cm, for what possible range of lengths of side “a” would ABC have two possible solutions (approximate to 2 decimal places)?

43. ## AMERICAN GOVERMENT

Please help The weaknesses of the Articles of Confederation were dramatized by all of the following except My ANSWER is (D) (A) the Newburgh Conspiracy. (B) Shays’ Rebellion. (C) the absence of a centralized authority. (D) the absence of a single

44. ## Physics

What will happen to the time of collision if you add weight to a cart but keeps its speed the same and send it rolling down a incline towards a force sensor?

45. ## Math

Given: sec θ = –6.4, 0˚  θ  360˚ , solve for θ.

46. ## Earlychilodhood education

Question 2 of 20 5.0 Points Hannah said, "I like blue the best. It is my favorite color. I am the only one who likes blue this much. That's why everything of mine is blue." This is typical of __________ speech. A. personal function B. heuristic function C.

47. ## Pol 201 American National Goverment

Please help The weaknesses of the Articles of Confederation were dramatized by all of the following except My ANSWER is (D) (A) the Newburgh Conspiracy. (B) Shays’ Rebellion. (C) the absence of a centralized authority. (D) the absence of a single

48. ## Math

Part 1: How are exponential growth and decay present in the real world? Give at least 2 examples for exponential growth and 2 examples of exponential decay. Thank You.

49. ## Earlychilodhood education

Kayla is 18 months old. She looked at Mrs. Crenshaw and said, "seblisboo." Mrs. Crenshaw did not understand any of what Kayla said, but her best response would be: A. "Say that again slowly." B. "Did you want to go outside?" C. "Speak clearly. I can't

50. ## math

The highest point on a trail, a pass with elevation of 1116 m, can be attained by climbing a 3.20 mile route from a waterfall, elevation of 60 m. The elevation gain from the waterfall to the pass is ___ feet. Do I just subtract 1116 - 60 = 1056 m and

51. ## math

from a point 50 m from the base of a cliff, a surveyor measures the angle of elevation to the top of the cliff as 73.2 degrees. how tall is the cliff to the nearest metre.

52. ## math

on a scale drawing 1/2 in.=1 ft. a room is pictured as 8in. by 6.5 inches. What are the actual dimensions in feet?

53. ## Earlychilodhood education

Question 4 of 20 5.0 Points Karen asked, "Where does rain come from?" The best response for her teacher is: A. "The clouds." B. "I don't really know, Karen." C. "How could we find out where rain comes from?" D. "That's really hard to understand, Karen."

54. ## College Algebra help please

I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each

55. ## Math

Translate and simplify "six less than twice the sum Of a number and three. I was not sure how to set it up Is it 2(x+3)-6 Or would it be set up 2x+3-6 I can solve it once I know how to set up the equation. Confused. Thanks for your help

56. ## Calculus

Which of the following is the Taylor series of ln(1−2x) about x=0 up to and including the terms of order three? What is order three?

57. ## Chemistry

What mass of glucose can be produced from a photosynthesis reaction that occurs using 21.2 mol CO2? Answer in units of g

58. ## math150

256x^8+30=31 how do i get rid of the x^8 (can someone show me the steps please)

60. ## Pre Algebra

In the given right triangle, find the missing length. The triangle has 24m on the right and on the left is c and at the bottom is 10m. a. 28m b. 26m c. 25m d. 27m

61. ## Math

A picture must be hung on a wall were the distance from the floor to ceiling is 8 feet. The center of the picture mist be 5 1/4 feet from the floor. Determine the distance from the ceiling to the top of the picture frame How do I do this problem? Thanks!!

62. ## Math

A bowling ball is dropped from a bridge, and it takes 7 seconds to hit the ground. How far did the bowling ball fall?

63. ## math

Simplify: (4x + 5)(4x2 + x - 4)

64. ## science

what volume of air is contained in an empty 250 mL aluminum can

65. ## Math

Under what circumstances is fog = gof always true? When is this statement true for f(x) = x2 + x – 2 and g(x) = x + 4? (4 marks)

66. ## geography

Importance of weather records

67. ## GTCC

If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 4 h, a swimmer makes exactly 93 laps in a swimming pool that is 50 m long. Determine the distance the swimmer traveled, the total displacement of

68. ## Physics

If instead, the swimmer makes 93.5 laps in the same pool in 4 h, determine the total distance the swimmer traveled, the swimmer's total displacement, the swimmer's average velocity, and the swimmer's average speed.

69. ## chemistry

23 grams of NaOH is dissolved in 1.5L of water, find; a)Concentration of the solution b)pOH c)pH

70. ## Physics

A pendulum and a mass spring system are both undergoing simple harmonic motion on Earth (use g = 10 N/kg). It is observed that every time the pendulum goes back and forth, the spring has gone up and down 12 times. If the pendulum has a length of 4 meters

71. ## Math

A rocket sled exerts 3.00(10^4) N of thrust and has a mass of 2.00(10^3) kg. What does it do "zero to sixty" in? How many g's does it achieve?

72. ## math

total of 17 heads and 42 feet with 3 times more ducks as pigs so how many duck do you have

73. ## Chemistry

A vessel containing 39.5 cm3 of helium gas at 25°C and 106 kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure of helium. If this required 17.8 cm3 of ethanol, what was the

74. ## physics

a 65 kg student, starting from rest , slides down an 8 meter high water slide. how fast is he going at the bottom of the slide ?

75. ## biology

Show that germinatingseeds produce heat energy.

76. ## physics

a 40 kg high jumper leaves the ground with a speed of 6m/s. how high can he jump ?

77. ## chemistry

a container has the dimensions of 2.5 m x50 cm x60 mm. It is filled with water at 0.0 degrees celsius,how many kilocalories will be necessary to heat the water to boiling point?

78. ## 5th grade Language Arts

I missed these questions on homework about adjectives. Can you double check my corrections? Directions: 1. tell what is the adjective 2. what noun or pronoun it's describing Sentences: 1. Rhode Island is a small state. My orig ans: 1. small, 2. Rhode

79. ## Anthropology

Which environment is least likely to be inhabited by pastoralists? (Points : 1) grasslands savannahs tropical forests deserts

80. ## Cultural Anthropology

A Big Man’s position differs from a chief’s position is not based on wealth. is based on personal skills and charisma. is an ascribed status. is reinforced through supernatural authority. My answer is a ascribed status is this correct?

Twelve college students were surveyed about the distance from their house to the college they attended. 12 18 54 13 15 24 8 5 14 27 1 20 1. Using the data set above, find the percentile ranking for the data point 24. (is this 75th percentile? 2. Using the

82. ## Chemistry

The distance between Miami and Key Largo is 70 miles. If a mile is 5280 ft and an inch is 2.54 cm, Calculate this distance in Kilometers

83. ## math

d=170 feet,t=34seconds r=ft/sec

Twelve college students were surveyed about the distance from their house to the college they attended. 12 18 54 13 15 24 8 5 14 27 1 20 1. Using the data set above, find the percentile ranking for the data point 24. (is this 75th percentile? 2. Using the

Joe an Idaho resident was driving in Tenn. and struck Jane, a Tenn. resident. Which is true? 1. Jane can sue Joe in Tenn. federal court if her damages are greater than \$75,000. 2. Jane can't see Joe in Tenn federal court because Joe isn't a resident. 3.

In basketball you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 3 points in every game this season, and have a season high score of 15 points in one game. How many field goals and free throws could you

87. ## Physics

Vector A has a magnitude of 5.00 units, vector has a magnitude of 5.00 units, and the dot product A·B has a value of 16. What is the angle between the directions of A and ?

88. ## Health Safety and Nutrition for young children

A plant in the classroom is wilting. The children are asked to come up with as many possible explanations for this as they can. They are engaged in the second stage of decision making, called

89. ## chemistry

how to convert 2.80cm into grams?

90. ## math

How can you tell 4/5 is in simplest form

91. ## math

suppose you invest \$500 in a savings account that pays 3.5% at an annual interest. When will the account contain \$650?

92. ## math

0= -4.9t^2+24t+3000 solve for t

How do you solve 41/2-1/4=?

94. ## geometry

I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(

95. ## math

Twelve college students were surveyed about the distance from their house to the college they attended. 12 18 54 13 15 24 8 5 14 27 1 20 1. Using the data set above, find the percentile ranking for the data point 24. (is this 75th percentile? 2. Using the

Given: angle A is 20˚, b = 50 cm, for what possible range of lengths of side “a” would triangle ABC have two possible solutions (approximate to 2 decimal places)?

97. ## Math

A local music store was selling a guitar for \$239. They then lowered the price to \$199. How much is the percent of discount?

98. ## Math

a mother wants to invest 5000 for her sons future education. She invests a portion of the money in a bank certificate of deposit which earns 4% and the remainder in a savings bond that earns 7%. If the total interest earned after one year is \$300.00,how

99. ## math

Chord BC is drawn in a circle with a radius of 3cm. Chord BS is 4cm long. Find the perpendicular distance from A to chord BC

100. ## Math

Many nations compare the value of their currency to the US dollar. On a day early in 2009, \$1 CDN (1 Canadian dollar) was worth \$0.8290 USD (US dollar). This is known as an exchange rate. On the same date \$1 USD could be used to buy 0.7579 Euros or 0.6709

101. ## Psychology

what were the implications of Babbage's calculating engine for the new psychology?

102. ## Math

What is the domain and range of f(x)=3^x-4

103. ## Math

Many nations compare the value of their currency to the US dollar. On a day early in 2009, \$1 CDN (1 Canadian dollar) was worth \$0.8290 USD (US dollar). This is known as an exchange rate. On the same date \$1 USD could be used to buy 0.7579 Euros or 0.6709

104. ## Math

Carrie runs 5 loops of mi each and Chris runs 2 loops of mi each. Who runs farther and by how much?

105. ## math

The sum of the distances two hikers walked is 53 mi, and the difference is 25 mi. What are the distances?

106. ## algebra 1

what steps someone would take to use your method (substitution) and a clear argument stating the reason why your method is better than the other ones. (in other words, come up with a few good sentences that explain why you choose your method and why others

107. ## Physics

A ball player hits a home run, and the baseball just clears a wall 20.6 m high located 132.0 m from home plate. The ball is hit an an angle of 35° to the horizontal, and air resistance is negligible. Assume the ball is hit at a height of 1.1 m above the

108. ## concepts to population health

Why should health care managers use available federal, state and local sources of population health data

109. ## Microsoft Excel

Is there a way to automatically fill the “DATE” when creating a new worksheet tab....Please help.. Thank you

110. ## Math

what is 1944 in roman numerals?

111. ## math

a roofer measured the side of a roof to be 4.8 m long . It rises a height of 3.2 m . at what angle does the roof rise to the nearest degree?

112. ## chemistry help plz

H / benzene ring-N \ CH3 select the class of compound from the choice below. 1-acetal 2-alcohol 3-alkene 4-amide 5-amine 6-carboxylic acid 7-ester 8-haloalkane

113. ## math150

[((5x^8)/(4y^7))^5]*[(4^4y^2)/(5^2x^-2)]

115. ## accounting

Maria Gonzalez opened a veterinary business in Nashville, Tennessee, on August 1. On August 31, the balance sheet showed Cash \$9,000, Accounts Receivable \$1,700, Supplies \$600, Office Equipment \$6,000, Accounts Payable \$3,600, and M. Gonzalez, Capital

116. ## Chem.

What is the mass (in kilograms) of a cube of silver that measures 0.68 on each side, when the density of the sample is 10.5g/cm3

117. ## 150 math

solve the equation for m 81m^4+54=70

118. ## Chem.

What is the mass (in kilograms) of a cube of silver that measures 0.68m on each side, when the density of the sample is 10.5g/cm3

At pressures greater than 60,000 kPa, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions? A.)It is much greater. B.)It is much less. C.)There is no difference. D.)It depends on the type of gas. I think it is

Answers for If I Live In Idaho And Have An Accident In Tennessee, Can The Person I Hit In Tennessee Sue Me In Tennessee If Damages Are Over \$75,000?

121. ## math

a scale distance of 3.5 cm on a certain maps represents an actual 17.5 km.what actual area does 7 square centimetres on the dame map represents?

I have a SUPER HUGE project due called National History day and need lots of help with it, plz plz plz help!!!!!

123. ## Math

What is the domain and range of y=3^x-4

124. ## physics

A uniforbm beam 6m long weighing 4kg rest on supports at p and q placed left and right 10m from each end of the beam weights of mass 10kg and 8kg are placed near p and q respectively on each end of the beam . calculate the reactions at p and q ?

125. ## maths-urgently

An arc of a circle is of length 5p cm and the sector is bounds has an area of 20p cm^2 find the radius of the circle.

126. ## math

solve and express the answer as an improper fraction in lowest terms 5/6-2/3(6-1/2)+3/4 I did 5/6-4+1/3+3/4 -31/6+1/3+3/4 -19/6+1/3+3/4 -38/12+4/12+9/12 -34/12+9/12 -25/12 is this correct? thanks

127. ## math

First estimate the answer. Then multiply to find the exact answer. Simplify all answers. 8 1/6 . 9 3/4

128. ## science

a cricket ball is thrown straight upward in the air at 14 m/s.determine the maximum height reached by the ball

129. ## maths

simple interest and compound interest on what sum will the compound interest at 10% per annum for 3 years compounded annually be Rs 331?

130. ## physics

Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k = 4.5). The empty capacitor is connected to a 15 -V battery. What must be the potential difference across the plates of the capacitor filled with a

131. ## physics

The resultant of two forces x and y will be greatest with the angle between x and y.

132. ## maths-urgently needed

A cube or a cuboid had the volume the measurement of the cubiod area in the ratio 1:2:3 if the difference between thee cost of painting the cuboid & cube (whole surface area) at the rate of 5m is rs80 find their volume

133. ## Religious Studies

When did the First Crusade start & end? Like as in the exact date? I can't seem to find it in any of my information books or online!

134. ## chemistry

Explain very briefly why the boiling point of H2O is higher than that of H2

135. ## math multiplying & divding mixed numbers

An estimate for 8 1/6 . 9 3/4 Simplify your answer. Type a whole number, proper fraction, or mixed number

137. ## math

Solve the following equations. 1. 3n = 6 2. 2s = 10 3. 6x = 24 4. 5y = 20 5. 10t = 30 6. 7n = 35

138. ## math

the axes are rectangular and a point P moves on the fixed plane lx+my+nz=p.the plane through P perpendicular to OP meets the axes in A,B,C parallel to YOZ,ZOX,XOY intersect in Q.show that the locus of Q is p{1/x2+1/y2+1/z2}=l/x+m/y+n/z

139. ## math multiplying & divding mixed numbers

An estimate for 8 1/6 . 9 3/4 Simplify your answer. Type a whole number, proper fraction, or mixed number

John was arrested under a New Jersey statute that made it a crime to wear green shorts. John argues that a similar stature was declared unconstitutional by the California state court, so the NJ state court is required to declare NJ statute

141. ## Physics

A sports car moving at constant speed travels 150 meters in 5.4 seconds , then brakes and comes to a stop in 3.9 seconds What is the magnitude of its acceleration in ? What is the magnitude of its acceleration in g's (g= 9.80 m/s^2 )?

142. ## math

The 6th term of an arithmetic sequence is x while the 11th is y find the 1st 2 terms

143. ## Physics

If a wave has a frequency of 24Hz and a wavelength of 15m, how do you calculate the speed of the wave ???? Please help

144. ## Physics

If a wave has a frequency of 24Hz and a wavelength of 15m, how do you calculate the speed of the wave ???? Please help

145. ## math

by how much would the number 4308 change if the digit 3 were replaced with the digit 1 ?

146. ## science

leila walks south for 20m and then west for 20m,determine resultant displacement

147. ## Calc

A car is moving at 40 mi/h along a straight line when the driver sees a light turn red. She hits the brakes when she is 100 ft from the light and decelerates at the rate of 16 ft per second squared. How far does she travel before stopping? Choose the whole

148. ## marketing

she purchase a lamp for Rs. 900 and sell it for Rs. 1500, determine the following a)rupee markup, b)markup percentage on cost, c)markup percentage of selling price

A neutral nitrogen atom has 7 electrons, 7 protons, and 7 neutrons. What is its total charge? If we remove 2 of the electrons, now what is its charge? what is its charge if we add 2 electrons to the neutrol atom instead? give charge in Coloumbs.

150. ## Chemistry

What would be the concentration of dinitrogen pentoxide after 6.00 X 10(2) seconds and how long would it take for the concentration of N2O2 to decrease to 10.0% of its initial value in the following equation... N2O5 to NO2 and O2 initial concentration is

Two nitrogen atoms are separated by 4 cm. Each atom has 2 extra electrons. What is the force between them? is it attractive or repulsive? Explain.

152. ## Chemistry

How many grams Al and how many grams Cr2O3 should be taken to gain 10g Cr.How many grams of Al2O3 will be spent? Reaction: Cr2O3 + 2Al -> 2Cr + Al2O3

153. ## Earlychilodhood education

Karen asked, "Where does rain come from?" The best response for her teacher is: A. "The clouds." B. "I don't really know, Karen." C. "How could we find out where rain comes from?" D. "That's really hard to understand, Karen."

154. ## CHEMISTRY

Whats the mass concentration of H2SO4 in a solution with percent mass 36% and density 1.84g/cm3 W(H2SO4)=36%? density(H2SO4)=1.84g/cm3 MassConcentration=?

155. ## english

1.How do decrease distance between subjects and verbs in this sentence. • Species of the genus Drosophila reproduce in a wide range of different resources, including fruits, sap, flowers, mushrooms and cacti. Drosophila species and their resources also