# Questions Asked onDecember 8, 2010

1. ## College Chemistry

Which solution would have the lowest freezing point, 0.500 M NaCl or 0.500 M CaCl2?

asked by Sa ndra
2. ## College Chemistry

A 50.0 mL sample of 6.0 M HCL is dulited to 200.0 mL. What is the new concentration of the acid?

asked by Sa ndra
3. ## Math

Losing your bags during airline travel is not all that uncommon. Recently, an airline was sited for losing customers' baggage 8% of the time. A test is conducted by randomly selecting 14 customers for that airline and observing whether they had lost their

4. ## Physics

A 10N meterstick is suspended by two sping scales, one at the .08 m mark and the other at the .9 m mark. If a weight of 5N is hung at the .2 m mark and a weight of 17N is hung at the .55 m mark, what will be the reading on each scale? I have:

5. ## Physics

Two straight and parallel wires of length 1.0 m carry a current - the first carries a currecnt of 9.0 A while the other wire carries a current of 4.0 A. What distance must separate the two straight and parallel copper wires if the force between them is to

6. ## math214

x/2+y/3=1 4y-3x=2

7. ## MATH

What is the index of a radical? When working with radicals, can the radicand be negative when the index is odd? Can it be negative when the index is even? Why is it important to simplify radical expressions before adding or subtracting? How is adding

8. ## MATH/FINANCE

If DOL is defined as DOL=Percentage change in OCF/Percentage Change in Q please derive equation: DOL=1+FC/OCF? I need this by tomorrow...please help.

9. ## FINANCE/MATH

Please use both M&M proposition II with taxes equation and WACC equation to derive the following equation:? WACC = Ru X [1- Tc(D/V)]? I need this by tomorrow please help.

10. ## Physics

A ladder of mass M and length 2 m rests against a frictionless wall at an angle of 47 degrees to the horizontal. The coefficient of static friction between the ladder and the floor is 0.5. What is the maximum distance along the ladder a person of mass 13M

11. ## Physics

A uniform meter stick of mass 40 g is used to suspend three objects as follows: 20 g at 0.13 m, 25 g at 0.41 m and 40 g at 0.64 m. Where could you place your finger to balance the stick in the horizontal position?

12. ## Math Finite

How many years will it take for \$12,000 to grow to \$15,000 at 5.75% compounded monthly?

13. ## Chemistry (URGENT)

What property of paradichlorobenzene may convince you that it is an ingredient in mothballs? Please help. I have no idea. I did search up mothballs and (PDB) is an ingredient but I don't know what property of PDB convinces that it's an ingredient. Any help

14. ## childhood obesity

what are some question you can ask to a child that is overweight?

15. ## Basic Electronics

discuss your thoughts on the use of thevenin equivalent circuit.

16. ## chemistry........help!! =)

One brand of laundry bleach is an aqueous solution containing 4.00% sodium hypochlorite (NaOCl) by mass What is the molarity of this solution? (Assume a density of 1.02 g/mL .)

asked by Lisa, Help needed!
17. ## Algebra

I am stuck... find the real solutions of the equation x to the 4th power minus 20x squared plus 64 equals 0

If the corressponding angles of 2 polygons are congruent and the lengths of the corresponding sides of the polygons are proportional the polygons are.. a. Regular b. Congruent c. Symmetrix d. Similar

19. ## Find the maximum value of this function

f(x) = 9 sqrt(x)e*(-x)

20. ## italian

A )Completare le farsi con il pronome personale opportune e con le desinenze del participio passato. 1-ALESSIA HA VINTO IL PRIMO PREMIO? ____GLI________ TELEFONO SUBITO E ____GLI _____DICO , SARA FELICISSIMA. 2- DEI COMPAGNI DI CLASSE HO RIVIST_O__SOLTANTO

21. ## italian language

A )Completare le farsi con il pronome personale opportune e con le desinenze del participio passato. 1-ALESSIA HA VINTO IL PRIMO PREMIO? ____GLI________ TELEFONO SUBITO E ____GLI _____DICO , SARA FELICISSIMA. 2- DEI COMPAGNI DI CLASSE HO RIVIST_O__SOLTANTO

22. ## geometry

________________________________________ ( 4.) Given u= i+3j-2k and v=4i-2j-4k Find u.v

23. ## social studies

In what ways did Europeans' desire for trade with Asia affect the western hemisphere?

24. ## chem

1. Explain the effects of the following factors on the relative reactivities of Sn1 and Sn2 reaction a.Nature of the carbon skeleton(primary, secondary, tertiary) b.Steric hindrance (primary vs hindered primary) c)Nature of the leaving groups d)Primary and

25. ## Statistic

The number of customers who enter a supermarket each hour is normally distributed with a mean of 600 and a standard deviation of 200. The supermarket is open 16 hours per day. what is the probability that the total number of customers who enter the

26. ## math

To figure out the cost to ship a package, George has a chart with pounds and ounces. Kai wanted to ship a 90 ounce package. For how many pounds must George charge Kai?

27. ## math,probability

Find the generating functions of a)p{x

28. ## physics

A stock room worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 4.50 m/s. The coefficient of kinetic friction between the box and the surface is 0.25. a) What horizontal force must be applied by the worker to maintain

29. ## Math

A projectile is fired straight up from a cliff which is 200 feet above ground with an initial velocity of 220 ft/sec. Assume that the only force affecting the projectile during flight is from gravity which produces a downward acceleration 32 ft/sec^2. Find

30. ## Physics

A projectile is fired straight up from a cliff which is 200 feet above ground with an initial velocity of 220 ft/sec. Assume that the only force affecting the projectile during flight is from gravity which produces a downward acceleration 32 ft/sec^2. Find

31. ## math

what is the divisible of 215 and 48

asked by alexis joan
32. ## chemistry-URGENT!!

A sample of ammonina gas at 65.5 degrees celsius and 524 torr has avolume of 15.31 L. What is it's volume at -15.8 degrees celsius and its pressure is 524 torr?

What is the density of CO2 gas at -25.2 degrees celsius and 98.0kPa?

34. ## Honors Biology - URGENT!!!

Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?

35. ## Honors Biology - URGENT!!!

ATP is used to power the movement of your muscles as you turn the pages of a book. Where did the energy in the ATP come from? Trace the energy in the ATP molecule back to the sun.

36. ## Honors Biology - URGENT!!!

After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria

37. ## Honors Biology - URGENT!!!

Without oxygen, cellular respiration grinds to a standstill, although glycolysis can continue to make some ATP anaerobically for a short time. When oxygen runs out, why does electron transport stop? Why do you thing the Krebs cycle stops?

38. ## Honors Biology - URGENT!!!

In an experiment, plants were grown under colored filters that allowed equal amounts of light of different colors to strike different plants. Under which filter do you think plants grew the slowest? Why?

39. ## geometry

If the bases of an isosceles trapezoid have lengths of 16 and 28, what is the length of the median? If necessary, round your answer to two decimal places.

40. ## biology

What regulary hit the earth for the first 600 million years of existence? What do scientists call this period of time? - Aseroids, and meteors hit the earth.What do scientists called this period of time ? I need help answer this question please. If the

41. ## Math

Find all the vectors that are perpendicular to (1,4,4,1) and (2,9,8,2).

42. ## Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product

43. ## Math

How do we know the ith of an invertible matrix B is orthogonal to the jth column of B^-1 , if i is not equal/unequal to j?

44. ## college chemistry

Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.

45. ## college chemistry

At a prominent state hospital, a 45-year-old woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this treatment. State the methods by which a radiation oncologist can administer

46. ## math

what is 4 times 3

47. ## math

if bill has 11 fiends for pizza each person gets 1/4 a pizza how many pizzas should he order

48. ## Bio

As a scientist, you are assigned the task of finding out if the disappearance of a particular fish species from a lake in the Northwestern United States is due to acid rain resulting from industrial air pollution. Identify alternative hypotheses that could

49. ## math

a right 90 degrees triangle/ label L,J and K. JK is 7 and angle L is 31.6.solve the given right triangle

50. ## math

Find the volume of the solid enclosed by the paraboloids z = 4*( x^{2} + y^{2} ) and z = 8 - 4*( x^{2} + y^{2} ).

51. ## plato

A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop whay

52. ## Physics

What is the volume of 3.25 moles of a gas at a temperature of 115 K and a pressure of 275 kPa?

53. ## Chemistry

If all of the energy from a 60-watt bulb was put into 1 gram of water at room temperature for 2 seconds, how much would the temperature of the water increase?

54. ## Earth's Heat Resources

list 3 examples of natural activities or events that carry thermal energy from within Earth directly to Earth's surface. I don't get what kinds of activities its referring to.

55. ## Earth's Heat Resources

How is the energy that reaches earth's surface returned to space? is is by radiation?

56. ## Earth's Heat Resources

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really don't get this question.

57. ## HEAT

A container holds a quantity of liquid nitrogen at a temperature of -200 degrees C. Explain how each of the following could be used to warm up the nitrogen. a)ice cubes b)hot water bath c)bubbling room air through the liquid All these substances contain a

58. ## using the geometric-programing method of constrain

the seasonal operating cost in dollars per square meter of grain bed for such a dryer consists of the cost of heating the air. heating cost=0,002Q(delta T) and blower operating cost Blower cost=2.6^(10^-9)Q^3 where Q= air quantity deliverd through the bed

59. ## 7th grade

a rectangular block measures 2cm * 1.5cm *1cm .the mass of the object is 31.5 grams .what is its density ?

60. ## criminal justice

what hiring standards are affected for different departments inmerged cell?

61. ## science

a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?

62. ## science

a shopper walks west 35m west, another 17m west and then 67m east. what is the resultant displacement?

63. ## Math

a ladder reaches 18 feet up the side of a building with its base 5 feet from the building. Find the slope of the ladder.

64. ## Math

If S is the subspace of R^3 containing only the zero vector, what is S perp ? If S is spanned by ( 1 , 1, 1), what is S perp? If S is spanned by ( 2, 0, 0) and ( 0, 0, 3), what is S perp?

65. ## College Chemistry..Urgent!

THE EQUILIBRIUM CONSTANT FOR A REACTION IS 2.48 AT 25 DEGREES CELSIUS. WHAT IS THE VALUE OF ΔG°(KJ)AT THIS TEMPERATURE? (R=8.314 J/K mol)

66. ## statistics

The lengths of pregnancies are normally distributed with a mean of 268 days and a standard deviation of 15 days. Out of 50 pregnancies, how many would you expect to last less than 250 days?

67. ## Chemistry

What is the pH of a solution if two aspirin each containing 500mg of acetylsalicyclic acid were dissolved in 325 ml of water?

68. ## physics

ladder of mass m and length l leans against a frictionless wall at an angle of 60 degrees. The coefficient of static friction between the ladder and ground is 0.45. A man whose mass is 4 times the ladder climbs up. How far up the ladder can he go before he

69. ## physics

Battery supplies a potential difference of 6v At a certain temperature the current in the 45ohms resistor is 0.08A How would you calculate the potential difference across the thermistor? thanks :)

70. ## Chemistry

Co-precipitation is the process by which undesirable materials are "carried down" and trapped on the suface or within the desired precitate. The precipitate is washed with distilled water to remove the co-precipitates which are more soluble that the

71. ## Chemistry

Gravimetric analysis does not always involve a precipitate. Consider the following problem. A mixture of calcium carbonate and calium oxide has a mass of 8.35 grams. When heated strongly, the CaCO3 in the sample decomposes into solid CaO and carbon dioxide

72. ## IPC

Suppose all of the apples have a mass of 0.10 kg. If apple (A) is sitting on the ground, what is its potential energy? A) 0.10 J B) 9.8 J C) 0.0 J D) 1.0 J Would it be A?

73. ## Math

show that the length of Ax equals the length of A^T x if AA^T=A^T A

74. ## Physics

a jetliner traveling northward is landing with a speed of 80 m/s. Once the jet touches down, it has 800 m of runway in which to reduce its speed to 10 m/s. (a) Compute the average acceleration (magnitude and direction) of the plane during landing (take the

75. ## English

I really need someone to have a look at these sentences. Thank you very, very much. 1)Up to the late eighteenth century the Church had been in charge of most (of) the educational facilities existing in England. 2) In the nineteenth century it contributed

76. ## physics

31. (II) a shotputter throws the shot with an initial speed of 15.5m/s at a 34.0* angle to the horizontal. Calculate the horizontal distance traveled by the shots if it leaves the athlete’s hand at a height of 2.20m above the ground.

77. ## Math

A basketball team has a season record of five wins and two losses. If the team continues this kind of performance, how many wins can it expect if it ends the season with six losses?

78. ## English

I forgot to include the following sentences. Thank you. 1)I need to rephrase this: “These schools incorporated the new-found ideals of manliness; of physical, sporting endeavour, of valuing team above self, of learning to play the game and without

79. ## Chemistry

Hi,can I have your help? I'm just trying to solve a few Dilution Solution problems. I'm stuck on these two,and I wish you could help. Here's one: A 500 mL bottle of concentrated acetic acid is diluted to make a 5.0% solution. Find the volume of diluted

80. ## POETRY, PART 2

Hopkins's use of "seared," "bleared," and "smeared" is an example of

81. ## Chemistry

Hydrochloric acid reacts with Magnesium to form Magnesium Chloride and Hydrogen gas. deltaH= -442kJ If 15mL of 1.0M HCl reacts with .3g of Mg, how many L of H2 are produced? How much heat is produced?

82. ## Spanish

16. ¿Pagaste sólo cinco dólares por la sudadera? a. !Qué caro! b. !Qué verde! c. !Qué ganga! d. !Qué grande! C 17. Prefiero esta blusa y ______ camisas. a. esa b. esas c. esto d. esta A? 18. "____, ¿cuánto cuestan estos tenis?" "Treinta pesos." a.

83. ## calculus

Find the area of the region under the graph of the function f on the interval [-1, 2]. f(x) = 6x + 1

84. ## MATH

CAN SOMEONE HELP ME FIND THE GCF OF THIS POLYNOMIAL? 6x^4+18x^2=

85. ## Math

If one apple and two pears cost \$1.55 and two apples and two pears cost \$2.30, how much does one apple cost?

86. ## physics

A ship approaches saturn at 10.4km/s and saturns speed is 9.6km/s (relative to the sun). Take the interaction as elastic collision. Saturns mass is greater than the space ship. Find the speed of the ship after it goes around Saturn.

87. ## health

Which is a condition of the male sex gland surrounding the urethra just under the urinary bladder? A. Cryptorchidism B. Hypogonadism C. benign prostatic hyperplasia D. Bulbourethristis I think it is B but not 100% sure or it may be D Help please need

88. ## chemestry

given 43 moles of KCl how much HNO3 is needed to complet the reaction

89. ## integration

Find the area of the region under the graph of the function f on the interval [-1, 2]. f(x) = 6x + 1 bound by the x axis

90. ## algebra

A. 3x + y = 8 x-y =6 B. x- 1/2y =2 y=2x-4 C. x + 2y = 9 2y = -x + 13 I am not grasping the substitution method! Please help me.

asked by Julie Jam
91. ## physics

why is the current the same in the resistor and the thermistor in a series circuit? thanks :)

92. ## Math

The price of admission for a concert was \$9 for adults and \$4 for children. Altogether, 1770 tickets were sold, and the resulting revenue was \$14,680. How many adults and how many children attended the concert?

asked by Julie Jam
93. ## physics

why does the voltage across the thermistor and resistor add up to the voltage of the battery? thanks :)

94. ## Chemistry

My teacher uses the online homework ARIS and the question is write the balanced equation of Mn3(PO4)2: i have enter the answer Mn3(PO4)2 (s) =3Mn^2+(aq) + 2(PO4)^3-(aq)

95. ## geometyr

determine the perimeter of triangle KLM, if triangle KLM-triangle FGH, FG=30, GH=38, FH=38 and KL=24

96. ## algebra

College Algebra Directions: Solve graphically: x^(2/3)+x^(1/3)-2=0 I just don't know how to approach this?!

97. ## Chemistry

Solid Nal is slowly added to a solution that is .0040 M in Cu^+. Calculate the [I-] when CuI just begins to precipitate from the solution.

98. ## CHemistry

What is the [OH-] of a saturated solution of Zn(OH)2? Ksp=1.8 x 10^-14. i'm just confused on how to start this problem i don't want the answer just the steps how to get there please

99. ## geomety

solve for x 5 + x 10 ----- = ---- x 8

100. ## social studies

what is a veteran?

101. ## Chem

Please tell me if these are right! What are the [H3O+] and [OH-] for a solution with the following pH values? a. 10.0 I got 1.0*10^-10 for [H3O+] and 1.0*10^-4 for [OH-] b. 5.0 I got 1.0*10^-5 for [H3O+] and 1.0*10^-9 for [OH-] c. 7.00 I got 1.0*10^-7 for

102. ## Chemistry

Identify an inert element that is used in electrical discharge tubes.

103. ## social studies

show me a pie chart with the population and land ownership of france in 1789

104. ## English

Rewrite the following fragments to make a complete sentence. 1. Have you seen the new movie about the Titanic? 2. If the powder turns red 3. before the sun rises

105. ## Physics

Ball, with a weight of 200 grams, tied to a string rotates around in a horizontal plane. Period of rotation is 2 seconds. What is the force (in N) which acts on the string? The length of the string is 0.5 meters.

106. ## English

Discuss your understanding of the term ‘Tense’ used in grammar

107. ## College Algebra

Directions: Find the REAL solutions of the equation x^3-2.6x^2=3.93 Please help, its for my final!

108. ## Physics

If given the ratio of temperatures in Celsius to Kelvin for Gold to silver as 1.10614 to 1.08265. How can I find the temperatures of each individual element form just this information?

109. ## spanish help

I need help translating this sentence into spanish I also experience a shortness of breath when I am taking long walks or walking up the steps.

110. ## 9th grade

a object has a mass of 30 grams and a volume of10 cm^3. what is the density of the material?

111. ## math

toy rubber balls are packaged in a circular cylinder that holds 3 balds. the diameter of each ball is 3.7 cm find the volume of the circular cylender use 3.14 to represent

112. ## physical science

how would you classify a solution that contains 1.5g of lithium carbonate in 100g of water at 20 degrees

113. ## English

Use semicolons or commas to revise each comma splice or fused sentence into a correct compound sentence.? 1. The group released a new CD today; however it will not be available for a month. The group released a new CD today; however it will not be

114. ## English

Express views on the given topic in paragraph form. It should comprise of 100-130 words.? "Giving is better than receiving." Comment.

115. ## bio

Artificial sweeteners, colorants, oils, and medications are manufactured after they are accepted by the U.S. FDA. In order to have such acceptance for public use, companies have to complete exhaustive testing to demonstrate the safety of their products.

116. ## 7th grade

2(2.5b-9) + 6b= -7 what is b

117. ## Chemistry

A 22.5 gram sample of ammonium carbonate contains ? mol of ammonium ions?

118. ## College Physics II

What is the longest wavelength light capable of ionizing a hydrogen atom in the n = 4 state? i know that Solve h c/L = (Rydberg)/6^2 for L something along those lines... but what am i solving for and what is c and h?

119. ## College Algebra

Solve for C 2a=(5b-c)/(3c+1)

120. ## Chem

What is the empirical formula of a compound that contains 27.0%S, 13.4%O,and 59.6%Cl by mass?

121. ## chemisty

how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?

122. ## chemistry

Write the 12 mole ratios that can be derived from the equation for the combustion of isopropyl alcohol?

123. ## Math

At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also failed check B? b. If a product

124. ## Chemistry

Which compound would be ionic? H2O, CO2, SrCl2,SO2, H2S

125. ## English

Can you help me check these sentences, too? Thank you very much. 1) Though many people don’t care what they wear, most people don’t like wearing old-fashioned (unfashionable) clothes. 2) In other words, they follow the latest fashion and are easily

126. ## Keyboarding and word processing

You're Creating A Table With Borders All Around The Cells Showing. Another Word For This Type Of Table Is A. Open. C. Boxed. B. Closed. D. Celled?

127. ## physics...

A satellite moves in a circular orbit around the Earth at a speed of 5661 m/s. (a) Determine the satellite's altitude above the surface of the Earth. i'm using the equation Gm/(r+h)=9.8 where h=altitude and i keep coming up with the wrong answer.

128. ## Bio

As a scientist, you are assigned the task of finding out if the disappearance of a particular fish species from a lake in the Northwestern United States is due to acid rain resulting from industrial air pollution. Identify alternative hypotheses that could

129. ## physics

The coefficient of kinetic friction for a 22 kg bobsled on a track is 0.20. What force is required to push it down a 6.0° incline and achieve a speed of 70 km/h at the end of 75 m?

130. ## chemical

how i can streched the stoichemtric chart for air at 20.40.60.80 c(Temperature)

131. ## physics

meerany A flat (unbanked) curve on a highway has a radius of 220.0 Ill. A car rounds the curve at a speed of 25.0 m/s. (a) What is the minimum coefficient of friction that will prevent sliding? (b) Suppose the highway is icy and the coefficient of friction

132. ## physics

The magnitude of the scalar product of vectors A and B is three times as large as the magnitude of the vector product of the same two vectors. If they were placed tail-to-tail in space, A and B would form an angle of approximately how much?

133. ## English

o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of sentence variety and the rhythm of the author’s writing. o Focus on the writing rather than the opinions presented. o Underline your topic sentence. Did I

134. ## Spanish

22. ¿Te gustan _______ pantalones ___? a. estos/marrones b. rojos/esos c. negros/estos d. el/grises A? 26. Llueve y hace frío hoy. _________ a. Menos mal que tengo una maleta b. Regreso a las tres c. No puedo tomar el sol d. ¿Dónde están mis anteojos

135. ## Art History

7. Compare the naturalism of Chinese art of the 10th to 12th centuries with the Western Romanesque art of the same time period. Use the Guanyin Bodhisattva, the handscroll, Ladies Preparing Newly Woven Silk, and the landscape paintings for specific

136. ## math

y= -x+1 using the numbers -2,-1,0,1,2 as x

137. ## Chemistry

using the gas laws, What is V in the table below? initial: 1420 torr 75 mL 200 K Final: 760 torr V 360 K What is T using the gas laws? Initial: 91.8 mL 365 K Final: 45.8 mL T

138. ## Chemistry

Calculate the energy of a photon of light with a wavelength of 360 nm?

139. ## math

a wagon train had ninety-six wagons each carrying the same number of people. when twelve broke down, each of the other wagons had to carry one more person. How many people were in each wagon originally.

140. ## Chemistry

A sample of unknown ore was analyzed and fgound to contain 12.7% Al, 19.7% N,and 67.6% O. What is the empirical formula of this ore?

141. ## science project

I need help writing my abstract for my science project and it's the only thing I have left to do. It's very fustrating, so is there anyone who can help me plz?!!!!!!!

142. ## Chemistry

What is the theoretical yield of PI3 from the reaction of 27.0 g of P and 68.0 g I2? 2P(s)+3I2(s) 2PI3(s)

143. ## math

The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball.

144. ## college

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced. 1. What are the upper and lower control limits for a sample size of 100? 2. Recompute the upper and

145. ## Cal

Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6

146. ## Math

The mass of the solid inside the sphere: x^2+y^2+z^2=1, above the xy plane and below the cone z=SqRT(x^2 + y^2. It's mass density is equal to the square of a distance from the origin, setup in both spherical and cylindrical coordinates. I don't have to

147. ## health

What is the role of administrative agencies in the current health care environment?

148. ## Physics

As you know, a cube with each side 4 m in length has a volume of 64 m3. Each side of the cube is now doubled in length. What is the ratio of the new volume to the old volume? Why is this ratio not simply 2? Include a sketch with dimensions.

149. ## math

A diameter of a circle is perpendicular to a chord whose length is 12 inches. If the length of the shorter segment of the diameter is 4 inches, what is the length of the longer segment of the diameter?

150. ## math

Two secant segments are drawn to a circle from a point outside the circle. The external segment of the first secant segment is 8 centimeters and its internal segment is 6 centimeters. If the entire length of the second secant segment is 28 scentimeters,

151. ## math

What is the mode of these numbers-19,20,32,26.Show me how you got your answer.

152. ## Chemistry

Calculate the pH of an aqueous solution at 25 degress C that is .41 M in phenol (C6H5OH). Ka for phenol=1.3 x 10^-10.

153. ## Chemistry

What is the original molarity of a solution of a weak acid whose Ka=3.5 x 10^-5 and whose pH is 5.28 at 25 degrees C?

154. ## 5th grade

What is the mode of these # 19,20,32,26

155. ## Chemistry

An aqueous solution of an unknown, monobasic weak base has an initial molarity of .176 M and a final[OH-] of .0000158 M. What is the Kb of the unknown base?

156. ## chemistry

What is the original molarity of an aqueous solution of ammonia (NH3) whose pH is 11.10 at 25 degrees C? (Kb for NH3=1.8 x 10^-5)

157. ## CHemistry

Calculate the pH of a .25 M ammonium acetate (CH3COONH4) soluton. I thought u just did -log(.25) but it keeps saying that i have the wrong answer.

158. ## H NMR

C4 H10 O2 ppm = 3.25 singlet 6H ppm = 3.45 singlet 4H

159. ## spanish

___(1)___ (ser) una noche suave de primavera. Tumbados en el césped (lying on the grass) María y Jose ___(2)___ (observar, observed) al cielo (sky) A veces, un viento suave ___(3)___ (turbar, moved) las blancas cortinas (curtains) y María y Jose

160. ## Chemistry

CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/mol-rxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?

161. ## chemistry

To what volume should you dilute 131 mL of an 8.20 M CuCl2 solution so that 49.0 mL of the diluted solution contains 4.53g CuCl2 ? Chemistry...Help!! - Dr Russ, Wednesday, December 8, 2010 at 4:43am Molar mass of CuCl2 is 134.5 g mol^-1 so solution needs

asked by Lisa, Help needed!
162. ## algebra

reduce the fraction 6x/12x to lowest terms.

163. ## Math

An Antique dealer visited three shops. she spend \$25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had \$60 left. How much money did the dealer have orginally?

164. ## GenChemistry

Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK

165. ## Geometry

An Antique dealer visited three shops. she spend \$25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had \$60 left. How much money did the dealer have orginally?

166. ## ALgebra word problem

one number is 6 more than another. their product is 91. what is the number?

167. ## Physics

A violin has an open string length (bridge to nut) of L=32.7 cm. At what distance x from the bridge does a violinist have to place his finger on the fingerboard to play a C (523.3 Hz) on the A string (fundamental frequency 440 Hz)?

168. ## Physics

Initially, you hear the siren at 90 dB. When the distance between you and the ambulance is a quarter of what it was initially, at what intensity level do you hear the siren? Assume that the siren is emitting sound equally in all directions.

169. ## math

mr smith wants to increase the size of his circles radius by 2 feet write a formula that can be used to find the circumference of the large circle

170. ## preschool

hello i need help with a lesson plan i need to find one regarding diversity, and whats the concept?

171. ## pre-algebra

k im not sure how im supposed to do this 3(x+2)= 5-2(x-3) i need to know x

172. ## chem 21

whatvolume will 1.00g h2O occupy if it is converted to steam at 100degree Cand 1.00 atm

173. ## geometry

What equation will express the relationship between the number of side, s, and the number of lines of symmetry, l, in a regular polygon

174. ## algebra

reduce the fraction 6x/12x to lowest terms

175. ## geometry

do the lenghts 11, 15, and 40 make a triangle?

176. ## social studies

What is the significance of immediate news media delivery on culture?

177. ## MATH

solve (x-3)(x+3)

178. ## calculus

let K=1/(1/4) if x=K/(K-x), find x

179. ## algebra

What is the check of 40/5=8

180. ## chemisty

when looking at a chemical equation what are the evidences that a chemical reaction has occured. Or what is the evidence that it has not occured thanks:):)

181. ## Trig

How do I do this? I punch the numbers into my calculator, and they don't work. B=sin^-1 (12/7 sin42\[Degree])

182. ## Chemistry

Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?

183. ## Chemistry

Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?

184. ## arithmetic

justins father says that he will not plant less than a square meter of any vegetable.design a garden with the largest possible amount of land planted in potatoes that fits the condition of the problem and hat least one square meter allotted for each

185. ## 6th grade

justins father says that he will not plant less than a square meter of any vegetable.design a garden with the largest possible amount of land planted in potatoes that fits the condition of the problem and hat least one square meter allotted for each

186. ## physics

While throwing a football, you exert a forward force of 50.0N on it and push it forward a distance of 1.2m. How much work do you do on the football?

3x^2-243=

188. ## englsh

need help in comparing Mercutio in romeo and juliet with riff in westside story

189. ## algebra

The sides of a square sheet of metal are of length 30 cm. A quadrant radius 15 cm is cut from each of the four corners. What is the perimeter of the shape which is left?

190. ## cemistry

what information is provided by the atomic mass?

191. ## algebra 1

can some one please help me with this equation using the addition principle -9/5 + x = -2/9 Please explain how you got your answer in all phases. Thanks

192. ## History

what are some good examples of Debate & Diplomacy: Successes, Failures, Consequences. in the past?

193. ## english

Im in third grade and i don't understand colons.i have to proofread a paragraph and combine them using colons.

194. ## decimals

what is the value of the 1 in 93.01?

195. ## Physics

An electron in a cathode-ray tube is traveling horizontally at 2.10 x 109 cm/s when deflection plates give it an upward acceleration of 6.39 x 1017 cm/s2 How long does it take for the electron to travel 6.20 m? What is the vertical displacement? I got the

196. ## Algebra

3x-2y=-5 and 4x+3y=-18 i need to graph and find the intersection

197. ## Com 155

I following is a paragraph regarding my experience with credit cards. I had to use least five adverbs and five adjectives in my paragraph. I have to bold the adverbs and underline the adjectives, the only problem is I am having a hard time figuring out

198. ## English

1. Don't touch the food with your hand. I think it's so _______. (Wound you name some suitable expressions for the blank?) 2. How many hours do you surf the Internet? 3. How many hours do you surf on the Internet? (Which one is correct, #2 or #3?)

199. ## chem- plz check my work

2. Given the following equation, C2H5OH(l) + 3 O2(g)---> 2 CO2(g) + 3 H2O(l) How many liter of CO2 are expected in the combustion of 12.0 grams of ethanol? My work: 12.0g C2H5OH X 1 mol C2H5OH/46.08g C2H5OH X 2 mol CO2/1 molC2H5OH X 22.4L CO2/1 mol CO2 =

200. ## 7th grade

WHATS 111,111 IN PRIME FACTORED FORM AND IN TREE FORM?

asked by Aileen Jiminian
201. ## chemistry

Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks!

i need to find 5 books that support development of gender identity by portraying males and females in diverse roles. but it has to be from 2005 till 2010 I found 1 but i cant seem to find more?

203. ## English

1. Seeing the policeman, he ran away. 2. When he saw the policeman, he ran away. 3. As soon as he saw the policeman, he ran away. (Which one is similar to #1, #2 or #3?)

204. ## math

sin^-1 (12/7 sin42\[Degree]) b = sin -1 (12/7 sin 42 degrees) How do I do this?

205. ## Chemistry

You react ammonia and oxygen, and at the end of the experiment you find that you produced 20.7 g of water and have 8.52 g of ammonia left over. Determine the mass of oxygen reacted.

206. ## physics

A plane designed for vertical takeoff has a mass of 51 kg. Find the net work Wnet as it accelerates upward at 1 m/s2 through a distance of 34 m after starting from rest.

207. ## Chemistry

You react 25.0 g hydrogen gas with 30.2 g oxygen gas. Determine the mass of water that can be produced from these reactants.

208. ## chemistry

magnesium has 3 isotopes. Magnesium-24 has a percent abundance of 78.99%. Magnesium-26 has a percent of 11.01%. what is the percent abundance of magnesium-25? assume that there are no other magnesium isotopes. how do i do this please help

asked by monique n
209. ## Algebra

express log (3x^5y^3/z^3) as the sum and difference of logs with no exponents.

210. ## 5th grade

if a line is measured as 1 and 4/8 inches long explain how you could simplify the measurement

211. ## english

Hi need help with need thesis. My thesis before was "Justice is not being severed in the case of the Somali pirates. Truth is being hindered from others about the Somali pirates and how the Somali pirates emerged in the beginning. How can I come up with

212. ## chemistry

Calculate the atomic mass of iridium. Iridium has two isotopes. Iridium-191 has a mass of 191.0 amu and a percent abundance of 37.58%. Iridium-191 has a mass of 193.0 amu and a percent abundance of 62.42%. how do i do this

asked by monique n
213. ## Chemistry

Calculate the weight percent of water in NiSO4 6H2O, how to calculate it?

214. ## college

Communication channels - physical presence, written-printed, electronic/computer what are the advantages and disadvantages of each?

215. ## trig

solving radical equations... help! 5+¡în+1= n+4

216. ## Chemistry

How many moles of carbon monoxide gas are produced when 2.88 moles of SnO2(s) react with excess carbon according to the equation below? SnO2(s) + 2C(s) --> Sn(s) + 2CO(g) How do you figure all of this out?

asked by Lauren K.
217. ## chemistry

Iodine-131 is used to destroy thyroid tissue in the treatment of an overactive thyroid. the half-life of iodine-131 is 8.02 days. if a hospital receives a shipment of 200.0g of iodine-131, how much iodine-131 would remain after 32 days?

asked by monique n
218. ## algebra 1

Solve the equation 7z+30=-5

219. ## chemistry

Mercury-197 is used for kidney scans and has a half-life of 3 days. if the amount of mercury-197 needed for a study is 1.0 grams and the time allowed for shipment is 15 days, how much mercury-197 will need to be ordered.

asked by monique n
220. ## social stuudies

why did the colonists draft the olive branch petetion?

221. ## chemistry

How much heat energy in KJ is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water increases from 20.91 degrees C to 26.45 degrees C? The bomb has a heat capacity of 469 J/degrees . The Calorimeter contaains 792

222. ## Help

How are oxygen and ozones alike? How are xyggen and ozone different?

223. ## comm 155 continued

I following is a paragraph regarding my experience with credit cards. I now need to bold the nouns and pronouns and underline the verbs. I do not know why, but I am having a hard time with this. Any help please. When I was 18, I received my first credit

224. ## algebra

A flagpole at a right angle to the horizontal is located on a slope that makes an angle of 12 degrees with the horizontal. The pole's shadow is 16 meters long and points directly up to the slope. The angle of elevation of the sun is 20 degrees. Draw the

225. ## science

What are the cell walls of fungi made of?

226. ## physics

the separation of the foci of an ellipse that describes a planet's orbit derermines A eccentricity of the orbit B period of the orbit C size of the orbit D all of the above. I think it is A because the closer the foci, the more circular versus elliptical

227. ## Physics

When railroad tracks are installed, gaps are left between the rails. Each steel rail is 8.0m long and has a cross-sectional area of 0.0020m^2. On a hot day, each rail thermally expands as much as 4.0mm. If there were no gaps between the rails, what would

228. ## Science 6th

how can you tell if an ear of purple corn was bred for it's purplr trait?

229. ## calculus

The moment of inertia about the pole(origin) of the plane region which is inside the cardiod: r = 1 + cosO and outside the circle r =1. It's mass density is equal to it's distance from the pole..... I need someone who is way smarter than me to help with

230. ## geometry

arc AB is 55 degrees. the radius of the circle is 4 inches. what is the length of arc AB?

231. ## math

A plane traveling at 600 mph leaves 3/4 hr earlier than a plane traveling at 800 mph. when will the second plane surpass the first?

232. ## statistics

Given the following data: 18,12,18,20,16,20,18,36,16,18, 14,20,24,20,5,18,10,15,24. Determine the mean, median and mode of this data

233. ## math

Look for a pattern in the table. Then write an equation that represents the table. x 0 1 2 3 y 1.5 4 6.5 9

234. ## 10th grade Chemistry

What is the hydroxide ion concentration in a solution with [H3O+] = 7.67*10^-9 M?

235. ## algebra

what is a distibutive property equation equaling 36

236. ## Math Correction

Explain how you can tell(without graphing) that the function has no x intercept and no asymptotes. What is the end behaviour? r(x)= x^6+10 / x^4+8x^2+15 How would I solve this? I know it has something to do with factoring but im not sure what else to do.

237. ## math

The bands sell all but 500 tickets for an 800 p.m concert at Badger Arena. At 730 p.m ,18,777 people have arrived. How many people are not at the arena yet?

238. ## business law

Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas

239. ## 4th grade

what is one way in which the state government and the federal government are different from each other?

240. ## math

monthly payments on a \$100000 loan at 5.5% annual interest amortized over 100 years will be close to?

asked by evan chen
241. ## 4th grade

The federal government affects the whole _______ _________ and the state government affects only the __________.

242. ## 11th grade

how can i write a acrostic poem on beowulf?

243. ## science

How much work does it take to hold a 150 N weight above your head for 3 seconds?

244. ## Physics

What is the difference in blood pressure (mm-Hg) between the top of the head and bottom of the feet of a 1.008 m-tall person standing vertically?

245. ## math

The volume of a ball is 288 pi cm^3. Find the dimensions of a rectangular box that is just large enough to hold the ball. Use 3.14 for pie

246. ## college

Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas

247. ## algebra

whta is the rule? m 2 4 6 8 n 18 16 14 12

248. ## English

I still have a few doubts. I hope you can have a look at them, too. Thank you. 1) The population of New York is 8,391,881 (people?). 2) How big/large is the population of New York? 3)The event takes place twice a year, once for spring-summer and once for

249. ## AP Physics B

An object of mass 3.2 kg is allowed to fall from rest under the force of gravity for 3.5 s. What is the change in its momentum? Ignore air resistance.

250. ## 5th grade

I need help! I am supposed to complete the table and write an equation to show the relationship. The table has input of x, 0,1,2,3,4,5 and output of y,4,10,16,22,and the last two outputs are blank. I think they are 28 and 34--but what is the relationship?

251. ## Poem Contset!!

There is a poem "contest" at my school and If I write a poem that's good it may go in a book! The only problem is I can't really write a GOOD poem. Can anyone post a site that may help Me? THanks, ErIn

252. ## Algebra

Describe two laws of exponents and provide an example illustrating each law. Explain how to simplify your expression. How do the laws work with rational exponents?

253. ## Math/Statistic

If I'm doing a pearson's and need to know the percentage of predicitability... all I have to do is work out the pearon's, right?

254. ## high school physics

Annie rides her snowboard down a hill sloped at 25 degrees. The coefficient of kinetic friction between her and her skies is .15. If her mass is 55 kg, hw fast is she excelerating? Assuming she starts from rest and the equation is v=v+a*t, what is her

255. ## Math- help finishing

A right triangle has an area of 84 ftand a hypotenuse 25 ft long. What are the lengths of its two sides? Ive gotten this far: 25^2= a^2+b^2 a=25-b 84= ab/2 168= 25b-b^2 b^2-25b+168=0 I then use the quad. formlua to solve for b... but I get an error. Can

256. ## Calculus

Find the horizontal asymptote of f(x)=e^x - x lim x->infinity (e^x)-x= infinity when it's going towards infinity, shouldn't it equal to negative infinity, since 0-infinity = - infinity lim x-> -infinity (e^x)-x= infinity

257. ## science

why is it important to know your family medical history

258. ## Precalculus

2sin^2x+3cosx=3

259. ## 6th grade

how do you do rate of change?

260. ## science

the separation of the foci of an ellipse that describes a planet's orbit derermines A eccentricity of the orbit B period of the orbit C size of the orbit D all of the above. I think it is A because the closer the foci, the more circular versus elliptical

261. ## Teachers aide

5 pamplets or copies that help parents understand how children grow and learn.

262. ## Chemistry

The specific heat capacity of Lead is 0.127J/degrees C*g. What is the molar heat capacity of Lead? What is the heat capacity of a lead cylinder that has a mass of 235000g?

263. ## physics

Bob is riding his bike along at 2m/s and drops his 2kg backpack from a height of 1.5 meters. What is the backpacks resulting velocity when it strikes the ground?

264. ## Teachers aide

music or words for four children's songs 2 must be from other cultures.must write song title, the name of the person who wrote it, the publisher's name and city and the copyright date. title: words by: music by: publisher,city,country: copyright date:

265. ## Precalculus

2sin^2x+3cosx=3 find all solutions in the interval [0,2pi]

266. ## 5th grade math

A set of books fills a shelf that is 24in long each book is 3/4 inch thick. How many books are in the classroom shelf? Would it be 18 ???

267. ## math

A circular piece of sheet metal has a diameter of 20 in. The edges are to be cut off to form a rectangle of area 160in^2. What are the dimensions of the rectangle?

268. ## math

in a class of 50 students, 29 are democrats, 11 are business majors, and 5 of the business majors are democrats. If one student is randomly selected, find the probability of A. choosing a democrat who is not a business major B. choosing a student who's

269. ## geometry

100.0 g of copper(II) carbonate (molar mass = 123.56 g/mol) was heated until it decomposed completely. The gas was collected and cooled to room temperature and normal pressure (25¨¬C and 1.00 atm). What volume of carbon dioxide was produced? The reaction

270. ## interval in math

what is the interval for the following set of numbers 3,4,6,7,8,3,2,1

asked by Tim S
271. ## com155

use five adverbs and five adjectives to write about a movie. Compare an event to similar events using three comparatives and three superlatives.

272. ## uop

Choose some numbers and work in a small group to figure out how to apply the tests for divisibility by 4, 6, 7, 8, 9, and 11 given on pp. 211–214. a. Use a calculator to select some numbers that are and some that aren’t divisible by these numbers. Give

273. ## Economics

Explain how the reluctance of oil and gas producers to drill for shallow gas was consistent with the law of supply?

274. ## Math

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also

275. ## Science

Describe the tools and materials that are provided by soil to play football

276. ## Logarithm law question

Hello, i was wondering if e^(2t) is equivalent to e^(t^2). I cant seem to find if this is true or not. Thanks

A 0.12 g sample of unknown was placed in a flask and dissolved in 125 mL of deionized water. A solution of HCl (0.10 M) was used to titrate the sample, and 18 mL was required to reach the endpoint. What is the formula weight of the unknown?

278. ## Chemistry

Given 175 liters of SO3 at 800 torr and 100 degrees C, find the volume at STP, give the mass of the sample and give the number of molecules in the sample. Can somebody please explain how I figure this out? I'm so lost. :{

279. ## 11th grade

I NEED URGENT HELP!! Bob is riding his bike along at 2m/s and drops his 2kg backpack from a height of 1.5 meters. What is the backpacks resulting velocity when it strikes the ground?

280. ## math

saving bond currently worth \$7600 collects 5.5% annual simple interest each year. if the bond was purchased seven yeara ago, how much was it bought for?

asked by evan chen
281. ## Spanish

36. Prefiero el té helado ______. a. la semana pasada b. cuando hace calor c. cuando hace frío d. cuando saco fotos B? 37. Estoy enfermo; no ______ ir de vacaciones. a. salgo b. voy c. pienso d. estoy Not sure :/ 38. ¿Qué ______ hacer tú y yo para su

282. ## physics

Joshua throws a stone horizontally from a cliff at a speed of 20m/s, which strikes the ground 2.0 seconds later a. use your knowledge of vectors and show that the stone strikes the ground at a speed of about 28m/s. b. At what angles does the ball strike

283. ## Calculus

If f(x)= sqrt(4sin(x)+2), then f'(0)=

284. ## science

How much force will a tennis racket need to exert on a tennis ball, with a mass of .67 kg, to make it accelerateat a rate of 5,600m/s^2?

285. ## physics

A tank of water 3 meters deep sits on a table 1 meter tall. A hole is located 2 meters from the bottom of the tank. Water flows out of the hole and strikes the ground. Where does it strike the ground? Assume incompressible, non viscous flow.

286. ## algebra

-56+y>113 solve the inequality

287. ## math

1/2 + 2/5 in simplest form?

288. ## College Algebra

Carbon-14 Dating. Only 10% of the carbon-14 in a samll wooden bowl remains. How old is the bowl? Half life of carbon is 5700 years.

289. ## science physics

A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2

290. ## English

1.Everyone in the club (has, have) read this book. 2.Most of the field (needs, need) mowing. Tell if the indefinite pronoun is singular or plural. Then choose correct word in () 1.singular=has 2.singular=needs

291. ## Chemistry

How would I go about doing this problem? 146 mL of wet H2 gas is collected over water at 29.0 degrees C and room pressure of 750 torr. Give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry

292. ## high school physics static friction

The system shown below is in equilibrium. Using the fact that block A is placed on a table, has a normal force of 40.2 N and it is not moving, what is the coefficient of static friction on block A? I know you can't answer this but if you have any

293. ## physics

In a time of 10s, a 70 kg student runs up 2 flights of stairs whose combined vertical height is 8.0m. compute the student's power output in doing work against gravity in (a)watts and (b)horsepower

294. ## math

b/4 >-5 solve inequality

295. ## Scince

How do you think you could increase the purity of the nitrogen gas?

296. ## chemistry

Determine the number of bromide ions in solution when 4.23 g of magnesium bromide and 1.21 g of potassium bromide are dissolved in 120mL of water. Please explain not sure how to even start this problem, thanks! chemistry - DrBob222, Wednesday, December 8,

297. ## chemistry - chromatography

Hello, can you tell me why different colors have different rf values

298. ## college

use the five steps for problem solving. the average of two test scores is 79. if one test score is eleven less than the other, what are the two test scores?

299. ## chemistry

how much energy would it take to completely melt 200kg of lead if the lead is currently at 25 degrees celcius

300. ## Calculus I

A square-bottomed box with no top has a fixed volume, V. What dimensions minimize the surface area?

301. ## Calculus

To construct a tincan, V=32pi m^3, The cost per square meter of the side is half of the top and bottom of can. What are the dimensions and the cost? V=πr²h=32pi SA=2πr²+2πrh h=32/r² Domain={r>o} Let x be the cost, I subbed 32/r² for h

302. ## 7th grade

i need help with social stuides describe islam in the 600's

303. ## Maths

How to work out the comparison 13 out of 39 as a percent

304. ## chemistry

If a volume of nitric oxide gas at 25.0°C increases from 2.00 L to 3.00 L, what is the final Celsius temperature? Assume pressure remains constant

305. ## chemistry

146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room conditions and the

306. ## Math 157

Can someone please help me. At a quality control checkpoint on a manafacturing assembly line, 10% of the items failed check A, 12% failed check B, and 3% failed both checks A and B. a. If a product failed check A, what is the probability that it also

307. ## english

unscramble the country sdettaietnsu

308. ## General Chemistry

An unknown compound has a formula of CxHyOz. You burn 0.1523 g of the compound and isolate 0.3718 g of CO2, and 0.1522 g of H2O. What is the empirical formula of the compound? If the molar mass is 72.1 g/mol what is the molecular formula?

309. ## physics

Consider a level flight turn of a propeller-driven airplane in which the airplane makes a complete circular turn in 1.6 min. If the plane's speed is 180 m/s, what is the radius of the circle? 1 m What is the centripetal acceleration of the plane? 2 m/s2

310. ## World History

What Iberian institutions were transplanted to the Americas?

311. ## English

1. None of the guests (has, have) left. 2. Each of these apples (is, are) ripe. 3.One of my favorite songwriters (is, are) Billy Joel. 4.Some of my cousins (has, have) come to my party. 5.All of the bread (was, were) eaten. Tell if the indefinite pronoun

312. ## PHYSICS

Search: a 1.0 kg mass weighs 9.8 n on earths surface and the radius of the earth is roughly 6.4x10 to the 6 m. what is the mass of the earth and the average density of Earth

313. ## General Chemistry

CaO + 2NH4Cl > 2NH3 + H2O + CaCl2 If 112 g of CaO and 224 g of NH4CL are mixed the theoretical yield of NH2 is 68.0 g. If only 16.3 g of NH3 is actually obtained, what is the percent yield?

314. ## cal 1

Find the dimensions of the rectangle of largest area that has its base on the x-axis and its other two vertices above the x-axis and lying on the parabola. (Round your answers to the nearest hundredth.) y = 7 - x^2

315. ## Cal 1

The top and bottom margins of a poster are each 12 cm and the side margins are each 8 cm. If the area of printed material on the poster is fixed at 1536 cm^2, find the dimensions of the poster with the smallest area.

316. ## World History

how did the caribbean serve as a model for the spanish empire?

317. ## Cal 1

Find the most general antiderivative of the function. Use C for any needed constant. f(x) = x - 6

318. ## Cal 1

Find the most general antiderivative of the function. Use C for any needed constant. g(θ) = cos(θ) - 5sin(θ)

319. ## Chemistry

If you have Hydrochloric acid, how many grams of aluminum must you use to produce 57.0 L of hydrogen at STP? 2Al(s)+6HCl(aq) --> 3H2(g)+2AlCl3(aq)

320. ## World History

How did the Portuguese experience in Brazil differ from the Spanish experience in Latin America? ... I don't really have any idea HELP please.

321. ## 6th grade

0.4/2.4=f/6 Dont know how to solve please explain so i can know thank u

322. ## General Chemistry

2Fe2O3 + 3C > 4Fe + 3CO2 If 6.2 mol of Fe2O3 is used, what amount of C is needed, and what amounts of Fe and Co2 are produced?

323. ## Calculus

If y=xln(x)^2 , then dy/dx=

324. ## Math Finite

College students were polled about favorite types of food. 50% liked pizza, 40% liked hamburgers, and 20% liked both. What percent liked pizza OR hamburgers?

325. ## english

can someone help me need ideas for science fiction story and the rationale behind it, The Martian Chronicles 1950

326. ## Calculus

A line through the origin, rotates around the origin in such a way that the angle, ¦È, between the line and the positive x-axis changes at the rate of d¦È/dt for time t¡Ý0. Which expression gives the rate at which the slope of the line is changing?

327. ## chem

AgNO3 + NaCl produces AgCl + NaNo3 how much AgCl is produced when 3.10g of AgNO3 and .600g of NaCl react?

328. ## chemistry

how would you solve this??? in short and long form? 238 12 (4) 1 92 U + 6 C ---> 0 N + _____

asked by monique n
329. ## English

Can anyone see any rhetorical device in this sentence? His father’s voice: You gonna let ’em push you around like that, boy? “No sir, Daddy,” Perry whispered. “I sure as hell ain’t.”( Sigler 227)

330. ## economics

Give an example of how confidence intervals could be used in your workplace.

331. ## organic chwmistry

When bromobenzene reacts with propene in a Heck reaction, two constitutional isomers are obtained as a product. Give the structures of the two

332. ## Algebra

How can you determine if two lines are perpendicular?

333. ## science physics

A giant crane in Washington DC was tested by lifting a 2.232x10^6 kg load. Find the magnitude of the force needed to lift the load with a net acceleration of 0m/s^2

334. ## chemistry

Determine the mass of NaCl in 1.0 L of 3.0 % by mass aqueous solution of sodium chloride. The density of the solutions is 1.10 gmL-1 please explain all the steps, thanks!

335. ## Pre-Calc

Can anyone help with the following problem please...Thank u so much Let f(x) =|9x|. For the area above the x-axis and between the lines x= -9 and x=18 a. draw and label a sketch with the area shaded b. find the area of the region in the xy-plane under the

336. ## Science

I need to have an essay written about a book and the scientific relation behind it. I would do it myself but I'm not sure I know what to do and it's a large portion of my grade and it's not due until June but I need it soon as possible so I can get the

337. ## Physics

Imagine that a small bug is trapped between two blocks ( 10kg and 5kg) In each case a person applies a force of 150 N to the right, but the order of the blocks is reversed. In which case will the bug have a better chance of surviving? Calculate the force

338. ## Chemistry

"A 25.0% solution of Al2(SO4)3 has a density of 1.75 g/ml. What is the mass of dissolved solute in 40.0 ml of solution?" How would one set this problem up?

339. ## statistics

Which statistical test woul you use to assess whether or not there is a relationship between the variables SEX and HOURLY WAGES?

340. ## math

A fence post is to be along side of a lot measuring 114 feet. 19 fence posts are to be used, 1 at each end and 17 equally spaced between the ends.What is the distance between centers of 2 consecutive fence post?