# If the relative atomic mass of CH2O is calculated it's empirical formula (C=12,H=1,O=16)

46,086 questions, page 263
1. ## Science

Which of the following does not change when a car keeps a constant speed, but changes direction? a.Acceleration b.Velocity c.Momentum d.Mass*** Can someone review my answer and make sure that I'm right?

asked by Dude on February 21, 2018
2. ## Dilsuknagar public school chemistry

Calculate the mass ,volume and number of molecules of hydrogen liberated when 198grams of zinc reacts with hydrochloric acid?

asked by meghansh on June 20, 2015
3. ## Science

You weigh yourself at the top of a high mountain and the scale reads 720N. If your mass is 75K, what is the acceleration of gravity at your location?

asked by Jennifer on March 24, 2008
4. ## math

when water freezes it its density drops from 1.00 g - 0.92 G find the mass in grams of an ice cube 1 meter on each Edge 1 m = 100 cm

asked by nanaw on March 15, 2016
5. ## Physical Science

According to the well known equation, energy equals mass times the speed of light squared..... ? You question is unclear. Please repost with more specifics.

asked by Gina on March 29, 2007
6. ## Physic

A ball of mass(M) falls from a height through a distance of 20m. Calculate its velocity if air friction is negligible.(take g=10m/s^2)

asked by Tony Tonero on October 27, 2015
7. ## ASAP CHEMISTRY

Determine the molar mass of the following: 0.94g of a gas that occupies 500L at 0 degrees celcius and 1.00 (STP). I keep getting 32g/mol

asked by Steph on December 13, 2012
8. ## chemistry

Can u show the solution to this problem? What is the mass of silver that can be prepared for 1.00g of copper metal Cu (s)+2AgNO3(ag)= Cu(NO3)2(ag)+2Ag(s)

asked by vee on March 13, 2014
9. ## Physics

In the following diagram there is a coefficient of friction, μ, of 0.15 between the 5.0 kg mass and the surface. Calculate the tension in the cable connecting the two masses and the resulting acceleration.

asked by Corey Brown on June 10, 2014
10. ## physics

Two masses of 8 kg and 12 kg are tied to each end f a string passing over a massless and frictionless pulley. find the resulting accelration of each mass.

asked by markcampo on March 20, 2013
11. ## Physical Science

A boy with a mass of 30 kg jumps off a 3 m diving board. How much kinetic energy does he have just before he hits the water? Answer none. 90 N. 900 J. 1800 J.

asked by Allison on September 11, 2011
12. ## Chemistry

The combustion of hexane can be represented by the following equation: __C6H14 (g) + __O2(g) → __CO2(g) + __H2O(g) What is the mass of carbon dioxide produced?

asked by Jessica on October 1, 2014
13. ## science

Athlete of mass 70.0kg runs a 1000m race in 10 seconds calculate the kenetic energy possessed by the body

asked by donkor on July 10, 2016
14. ## physics

A ball of mass .3 kg is dropped from a height of 10m. Its momentum when it strikes the ground is? I know p=mv how would I find velocity for this problem? Thanks in advance for your help.

asked by Tammy on October 24, 2007
15. ## Physics

A brick of mass 2kg just begins to slide down an inclined plane at an angle of 45 degree with horizontal.what will be the force of friction

asked by Anonymous on November 27, 2016
16. ## chemistry

Determine the percent by mass of water in your sample of hydrated copper (II) sulfate - CuSO4. xH2O My work I got 10% is this correct?

asked by Kiki on December 1, 2014
17. ## Science

If a loaded truck that can accelerate at 1 m/s2 loses its load and has one-half of the original mass, what acceleration can it attain from the same driving force?

asked by Justin Wyms on May 20, 2014
18. ## value

ACAR OF MASS 1200KG TRAVEL OF SPEED OF 20M PERSECOND IF ITS ENGINE DEVELOPS INTO 3KW,FIND THE FORCE USED

asked by Anonymous on February 13, 2017
19. ## science

a tennis ball of mass m strikes the massive wall with velocity v and traces the same path.calculate the change in momentum

asked by ayesha khan on September 16, 2015
20. ## Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.

asked by Jeconiah on June 6, 2012
21. ## SCIENCE

I have 2 questions that I need help with please. 1.What are the three parts of the law of conservation of mass/matter? Do not need the definition but the 3 laws please. 2. How are velocity, speed, and acceleration related? I know how they are different

22. ## chemistry

What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?

asked by Kris on August 1, 2013
23. ## chemistry

what mass of zinc dissolved in dilute HCL will produce 0.15g of hydrogen ? can you explain the steps to sloving this question please

asked by precious on April 15, 2015
24. ## cHEMISTRY

What mass of AgCl(143.32g/mol) is formed from the reaction of a 0.109 M MgCl2 solution with excess AgC2H3O2?

asked by lIZ on February 29, 2016
25. ## Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.

asked by Jeconiah on June 6, 2012
26. ## chemistry

What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?

asked by Kris on August 1, 2013
27. ## physics homework

0.2kg mass hangs at the end of the wire. what is the tension if the ball is then whirled around in a horizontal circle with tangential velocity of 5m/s

asked by ama bankye on November 13, 2010
28. ## physics

A stone of mass 2.8kg is projected upward with a speed of 5m/s. calculate the maximum height reached. use g=10m/s square.

asked by Mawatta on March 16, 2017
29. ## Geology

Why isn't the land surface of Earth flat after millions of years of erosion by mass wasting as well as by other erosional agents?

asked by Angel on April 20, 2011
30. ## physics

Find the pottential energy of a boy of mass 10kg standing on a building floor 10 meters above the ground level p.e?

asked by Salisu on February 3, 2014
31. ## physics

solve this physics problem for me a vehicle has a mass of 1200kg and four wheels of area 0.06m2 calculate pressure on one wheel

asked by patrick on May 29, 2017
32. ## Physics

A racing car has a mass of 1540 kg. What is its kinetic energy if it has a speed of 110 km/h? Assume that air resistance is negligible.

asked by Lisa on December 6, 2011
33. ## physics

what will be the centipetal acceleration on a man whose mass is 80 kg,when resting on a ground at the equator if the radius of the earth'R' is 6.4x10 power 6 meter.

asked by komal on December 31, 2014
34. ## physics

mass = 46 kg, angle 20 degrees, tension 240 newton , coefficient of kinetic friction = 0.5 find acceleration of the object

asked by Anonymous on May 24, 2010
35. ## Chemistry

A 1.00-L gas sample at 100.°C and 611 torr contains 50.0% helium and 50.0% xenon by mass. What are the partial pressures of the individual gases?

asked by Anonymous on November 6, 2010
36. ## Chemistry!!!

Calculate the density of a certain gas if its pressure is 0.725 atm, its molar mass is 48.22 g/mol, and the temperature of the has is 24.0 degrees Celsius

asked by Amanda on May 3, 2011
37. ## chemistry

calculate the mass of solid NaCl that must be added to 1.5L of 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl?

asked by NONO on November 18, 2011
38. ## Physics

Abby went skiing and was sliding down a 10 degrees hill. Ignore friction and air resistance. What is the x-component of the weight? The mass is 76-kh

asked by Anonymous on May 5, 2016
39. ## Chemistry

Using the equation 4Fe + 3O2 -> 2Fe2O3, calculae the total mass of oxgen needed to react wih all of 0.55 g of iron.

asked by Chelsey on September 21, 2012
40. ## CHEM 120

What mass of ammonium nitrate must be added to 350 mL OF 0.150 M solution of ammonia to give a buffer having pH of 9.00? (Kb(NH3)= 1.8X10-5

asked by Mxolisi on November 10, 2016
41. ## Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.

asked by Jeconiah on June 5, 2012
42. ## physics

an object weighs 10N on earth .what is the objects weight on a planet one tenth the earths mass and one half its radius?

asked by Kat on July 12, 2013
43. ## Chemistry

I have a solution that contains 30 lbs of sugar in 2.5 gallosn of water. Calculate the mass percent, molarity, molality and mole fraction

asked by Pam on October 27, 2011
44. ## Physics

A dense plastic toy of mass 2.8 kg is floating just beneath the surface of a pond. What is the buoyant force on it? Answer in units of N.

asked by Kitty on April 28, 2016
45. ## Physics

An object of mass 20kg slides down an inclined plane at an angle of 30 degree to the horizontal. The coefficient of static friction is?

asked by Sbjjayo on April 25, 2013
46. ## Physics

Calculate the energy released when 235 U fissions resulting in two lighter stable nuclei with mass numbers 140 and 93.Please help!

asked by William on March 4, 2015
47. ## Chemistry

After 1.78 years, 1.990 g of a radioisotope remains from a sample that had an original mass of 2.000 g. Calculate the half-life of the isotope.

asked by Rachel on September 16, 2012
48. ## Math #3

Which is likely to have a mass close to 3 kilograms? A: a 5-year-old child B: a bowling ball*** C: a lemon D: an adult lion Can someone check this plz

asked by Kaitlyn on April 13, 2017
49. ## chemistry

calculate the mass given element of each of the following compounds a) brimine in 50.0 potassium bromide, KBr b) Chromium in 1.00 kg sodium dichromate Na2Cr2O7

asked by joanna on March 13, 2008
50. ## physics

Two stars, a binary star system, with a mass of m1 = 5.88E29 and m2 = 2.27E30 kg are separated by a distance of 2.55E11 m. What is the gravitational force between them?

asked by Anonymous on February 11, 2011
51. ## CHEM 1411

What mass of Gallium chloride is formed by the reaction of 2.6 L of a 1.44 M solution of HCl according to the following equation: 2Ga+ 6HCl= 2GaCl3+3H2

asked by JACI WINLOW on October 18, 2016
52. ## statistic

Which of the following behave according to a power model? Select all the apply. 1.Finance 2. Population 3. area 4. Pricing 5. volume 6. bacteria 7. mass

asked by helen on December 13, 2013
53. ## Chemistry

A sample of gas weighs 2.832g and has a volume of 1010.0 ML at 775.0 torr and 31.0 degrees Celsius what is its molar mass?

asked by Anonymous on March 11, 2013
54. ## chemistry

2C6H5CL + C2HOCL3 / C14H9CL5 + H2O 114G CHLOROBENZENE IS REACTED WITH 485G CHLORAL. WHAT MASS OF DDT IS FORMED?

asked by anderson on September 14, 2010
55. ## math

how much mass is converted to energy per day ina nuclear power plant operated at a level of 100 megawatts?

asked by flint zaki on June 21, 2017
56. ## chemistry

0.361g of an unknown liquid occupied a volume of 250.0 ml Hg pressure and 100 degrees celcius. what is the molar mass?

asked by khela on November 8, 2010
57. ## Chemistry

If you place 1.26 g of solid silicon in a 6.54 L flask that contains CH3Cl with a pressure of 634 mm Hg at 25°C, what mass of dimethyldichlorosilane, (CH3)2SiCl2(g), can be formed?

asked by Julian on December 1, 2015
58. ## biochemistry

calculate the mass of sodium benzoate that must be added to 1 litre of 0.4M benzoic acid with Ka=6.4 multiplied by 0.00004 solution to a buffer at pH 4.5

asked by sammyt on September 15, 2010
59. ## Physics

A motorcycle with a mass of 350 kg is accelerated from rest to a velocity of 30 m/s by a force of 4000 N. calculate the distance over which this acceleration occurred.

asked by helpp on April 19, 2011
60. ## physics

A 20kg mass moving at a speed of 3m/s is stopped by a constant force of 15N. Show that the stopping time required is 4s.

asked by sherri on April 5, 2010
61. ## chem 1411

what mass of H2 is produced by the reaction of 118.5 mL of a 0.8775M solution of H3PO4 according to the following equation: 2Cr+2H3PO4= 3H2+2CrPO4

asked by JACI WINLOW on October 18, 2016
62. ## Chemistry

What is the mass of water that can be heated from 39 C to 80 C by the combustion of 150 g of methane. CH4 + 2O2 => CO2 + 2H2O Delta H= -890kJ

asked by Lisa on January 11, 2013
63. ## Energy of satellite PHYSICS

An m = 43 kg mass instrument package is put into orbit at an altitude above the Earth of A = 23000 km. What is the kinetic energy of this satellite in Joules?

asked by Stephanie on April 10, 2016
64. ## science

How might the formation of Pangaea have led to mass extinctions at the end of the Permian period, about 250 million years ago?

asked by Lindsey on January 21, 2014
65. ## physics

Mass mA rests on a smooth horizontal surface, mB hangs vertically.If m_{\rm{A}}=13.0 kg and m_{\rm{B}}=3.0 kg in the figure , determine the magnitude of the acceleration of each block.

asked by Anonymous on October 23, 2010
66. ## science

Jai-Anna, who has a mass of 45 kilograms, climbed 3 meters up a ladder to rescue her cat from a tree. How much work against gravity did she do?

asked by cristopher on November 15, 2012
67. ## Chemistry

A student analyzing 2.000g of Epsom Salt found that it contained 39.0% by mass water. What is the hydration number for this sample?

asked by Caroline on December 7, 2014
68. ## chemistry

2SO2(g) + O2(g) >2SO3(g). If 96g SO2 is added to 2 moles of oxygen at STP, calculate the mass of SO3 that is formed

asked by Minah on August 4, 2013
69. ## science

a boy whose mass is 69kg climbs a tree 10m high in 12s .calculate the work done and power developed

asked by latela on April 17, 2016
70. ## Chemistry

What weight of glycerol C3H5(OH)3 molar mass is 92 would have been add to 1000g of water in order to lower the freezing point

asked by Anonymous on June 16, 2011
71. ## Physics

Forces of 11.5 N north, 20.4 N east, and 15.7 N south are simultaneously applied to a 3.74 kg mass as it rests on an air table. What is the magnitude of its acceleration?

asked by Bala on October 31, 2010
72. ## Physics

A pendulum has a mass of 3-kg, a length of 3 meters and swings through a (half)arc of .47 radians. To the tenth of a Joule, what is its Total Energy?

asked by Skyler on August 15, 2010
73. ## Math

If the markup is %50 and the selling price is $300, what is the initial price? Given answers: A$150 B $200 C$350 D $400 I asked help from my mother and she said the answer was A,$150, although from the formula R = C / ( 1 - G) (to calculate revenue R

asked by anon on January 7, 2016
74. ## physics

The earth orbits the sun once every 365.24 days. The distance between the earth and sun is 1.49x 10^8 Km. The mass of the earth is 5.96 x 10 ^24 kg. A) Find the magnitude in newtons of the centripetal force acting on the earth. The mass of mars is 6.56 x

asked by ED on October 12, 2011
75. ## statistics

According to U.S. News & World Report data, in 1995 tuition costs at Indiana University, a public university, were $2,984 per year, while the tuition costs at the University of Evansville, a private university in Indiana, were$11,800 per year. In that

asked by mike on September 27, 2014
76. ## Physics

Can someone help me find Delta Time for the first 150 meters of this question. Everytime I try and get it by using the quadratic formula I get two negative numbers which I don't think is right. A model rocket is launched straight upward with an initial

asked by Dustin on September 28, 2007
77. ## Trig Help!

Question: Trying to find cos π/12, if cos π/6 = square root 3 over 2, how to find cos π/12 using DOUBLE angle formula? This is what I got so far.. cos 2(π/6) = cos (π/6 + π/6) = (cos π/6)(cos π/6) - (sin π/6)(sin π/6) = cos^2 π/6 - sin^2 π/6 Is

asked by Anonymous on April 27, 2012
78. ## precalculus

A town has population 700 people at year t=0 . Write a formula for the population, P, in year t if the town: (A) Grows by 45 people per year: P= (D) Shrinks by 12 people per year: P=

asked by barney on March 13, 2019
79. ## algebra 1

The formula for the volume, V, of a prism is V = Bh, where B equals the base area, and h is the height of the prism. What is the height of a prism with base area 21 cm2 and volume 84 cm3?

asked by lily on February 15, 2013
80. ## math

The sum of the first 5 natural numbers is 15 or (5)(6)/2. The sum of the first 21 natural numbers is 231=(21)(22)/2, and the sum of the first 30 numbers is 465. Use inductive reasoning to derive the formula for the sum of the first n natural numbers.

asked by Gloria on June 11, 2012
81. ## Math

5/8 of the students in my class were boys. When 6 girls joined the class, the number of boys equaled the number of girls. How many students were in my class then? "What's the formula for this problem?"

asked by Kevin on July 3, 2016
82. ## math

on a game board, landing on blue means to move ahead 1 space , landing on red means to move ahead 2 spaces, and landing on orange means to move back 1 space. if you took 30 spins about where would you expect to be on the game board, relative to where you

asked by ciera on January 23, 2007
83. ## math

Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

asked by john on January 9, 2010
84. ## Math story problem

Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

asked by John on January 9, 2010
85. ## math/story problem

Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

86. ## chem

how is the oxide of arsenic worked out when its in its gas state please help im flumuxed Please clarify your question? What do you mean by "worked out? the question states determine the molecular formular of the oxide of arsenic when it is in its gaseous

asked by donald on January 30, 2007
87. ## science

2) A roller coaster is at the top of a 98.2 m hill and has a mass of 1831.0 kg. It is traveling at a velocity of 23.7 m/s. What is the coaster car's TOTAL energy? I used the eg=m*g*h equation and got a value of 1762081.16 .. i then used the ek=1/2mv^2 and

asked by Mary on December 7, 2009
88. ## Chemistry

I am to use this formula to find ΔH°f,methane: ΔH°comb=2ΔH°f,water+ΔH°f, carbon dioxide-ΔH°f,methane-2ΔH°f,oxygen For ΔH°comb, the value is 884 KJ/mol For ΔH°f,water, the value is -285.8 For ΔH°f,carbon dioxide, the value is -393.5 I was

asked by Liz on July 20, 2014
89. ## English

Thank you very much for helping me. Here are some more sentences on the same theme (a continuation) I need you to check. Thank you. 1) In Shakespeare’s day the second course was the main part of the meal. 2) Waking life is imagined (was imagined?) as the

asked by Henry2 on October 1, 2011
90. ## astronomy

You are a pulsar astronomer, and you have been measuring the pulses from a particular milli-second pulsar for several hundred days. You find that they do not arrive at regular intervals - sometimes they arrive a little early and sometimes a little late.

asked by juanpro on June 29, 2014
91. ## Economics

Given the following data, use present worth analysis to ﬁnd the best alternative, A,B, or C. A B C Initial cost $10,000 15,000$12,000 Annual beneﬁt 6,000 10,000 5,000 Salvage value 1,000 −2,000 3,000 Useful life 2 years 3 years 4 years Use an

asked by Anonymous on September 30, 2014
92. ## physics

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of

asked by Jack on September 6, 2010
93. ## chemistry

A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is filled with concentrated sulfuric acid, H2SO4, its mass is 1026.57 g. What is the density of concentrated sulfuric acid? (Assume water has a density of

asked by Jack on September 6, 2010
94. ## algerba

How to figure out the temperature of a lake using x for the feet or the Depth and for the degrees Celsius, use (3900x+1000) /(3x^2+100) with the answer of the degrees Celsius being 6.74 looking like 6.74=(3900x+1000)/(3x^2+100) i need the depth i have

asked by beckylynn on May 18, 2014

If x dollars is deposited every four weeks (13 times a year) into an account paying an annual interest rate r, expressed in decimal form, then the amount An in the account after n years can be approximated by the formula .If $45 is deposited every four asked by Anonymous on May 21, 2013 96. ## MAT/116 I was just wandering if this was correct? 1. Your company is planning to spend no less than$80,000 and no more than $100,000 on a landscaping project, which will be used as a promotional park that promotes your toaster manufacturing company. Write an asked by Vic on May 30, 2011 97. ## MAT/116 I was just wandering if this was correct? 1. Your company is planning to spend no less than$80,000 and no more than \$100,000 on a landscaping project, which will be used as a promotional park that promotes your toaster manufacturing company. Write an

asked by Vic on May 29, 2011
98. ## chem

Calculate the pH of 0.20 M NaCN solution. NaCN ---> Na+ + CN- CN- + H20+ ---> HCN+ + OH- Initial conc. of CN- = 0.20 mol/L change = -x equillibrium = 0.20-x HCN equill. = +x OH equill. = 1x10^-7+x Ka= 6.2 x 10^-10 Kb = KW/Ka = 1x10^-14/6n2 x 10^-10 = 1.6 x

asked by Lena on July 24, 2009
99. ## Physics

5 moles of ideal gas cloud has an initial pressure of 1.00 bar, initial volume of 100.0L and temperature of 25.0ºC. The cloud expands adiabatically to a final volume of 900.0L. Cp,m= 15.79 J mol-1 K-1 . What is the final pressure and final temperature of

asked by Orbit on February 28, 2017
100. ## math

I am lost, and I bet it is simple, but I have been working with many problems and I keep coming back to this and I grow increasingly confused. How do I begin to solve this problem? In 1993 the life expectancy of males in a certain country was 71.7 years.

asked by H on January 7, 2010