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

46,086 questions, page 242
1. ## College Algebra

A ball is thrown up from a twelve foot platform with an initial velocity of 112 feet/second. The formula that describes the height of the ball in terms of time is: f(t) = -16t^2+112t+12. Determine the time at which the ball reaches its maximum height.

asked by Lauren Marie on August 11, 2011
2. ## chemistry

Zn + 2HCl ---> ZnCl2 + H2(g) What mass of zinc is needed to produce 115 mL of hydrogen? t's given 115 mL of hydrogen, so can convert to 115/1000/22,4 = 0.0051 moles H2 - the ratio between HCl and H2 is 2 : 1, so the moles of HCl needed for this reaction is

asked by Shine bright shine far on January 29, 2019
3. ## Physics Electrical help thanks

Thank you ! At some instant the velocity components of an electron moving between two charged parallel plates are vx = 1.3 105 m/s and vy = 3.6 103 m/s. Suppose that the electric field between the plates is given by E = (120 N/C) j. (a) What is the

asked by Jennifer on February 15, 2007
4. ## chemistry

How is ambient energy relative to whether a reaction is spontaneous?? Does Exothermic reaction that is self-sustaining not have any ambient energy? I don't know but if there is a higher amount of ambient energy is the reaction spontaneous? I don't think a

asked by Anonymous on April 5, 2018
5. ## algebra 2

The amount of money in an account with continuously compounded interest is given by the formula A=Pe^rt , where P is the principal, r is the annual interest rate, and t is the time in years. Calculate to the nearest hundredth of a year how long it takes

asked by David on May 27, 2011

I'm sorry the computer jammed on an earlier post and I couldn't do anything-so here is the problem I need asistance with Please check and offer advice-I'm NOT SURE IF I USED CORRECT FORMULAS-thank you the problem is List the center, vertices, and foci of

asked by Josh on January 13, 2012
7. ## Algebra

Tire pressure is directly proportional to temp on a temp scale where zero degrees is absolute zero. given that temp in degrees celcius and degrees Fahrenheit are related by the formula F=9/5C +32 and absolute zero is -273.15C, by what % does tire pressure

asked by Grace on October 18, 2016
8. ## algebra

The amount of money in an account with continuously compounded interest is given by the formula A=Pe^rt , where P is the principal, r is the annual interest rate, and t is the time in years. Calculate to the nearest hundredth of a year how long it takes

asked by david on May 27, 2011
9. ## Chemistry

Help writing complete ionic and net ionic equations.? Hg2(NO3)2 (aq) + CuSO4 ---> Cu(NO3)2 (aq) + Hg2SO4 (s) K2CO3 (aq) + MgI2 --> MgCO3 (s) + 2KI 3 NaCrO4 (aq) +2 AlBr3 ---> Al2(CrO4)3 (s) + 6NaBr i got down writing the formula equation but i would like

asked by Drake on October 16, 2012
10. ## ctu

Stuart’s car loan reached a maturity value of \$14001.00 after 3 years. Find the rate on Stuart’s loan if the principal he borrowed was \$12474.00 Use the formula to find the interest; then use to find the rate in decimal form. Leave your answer in

asked by mary on September 28, 2015
11. ## Math - Please check!

1. Find the circumference of a circle with a diameter of 11 cm to the nearest hundredth. Measurement formula C = pi x diameter a. 34.54 cm *** b. 17.27 cm c. 5.5 cm d. 33 cm 2. Which of the following is an irrational number? a. square root 144 b. 0.25 c.

asked by Carlos on April 14, 2016
12. ## math trig

A Ferris wheel with a diameter of 37 meters rotates at a rate of 4 minutes per revolution. Riders board the Ferris wheel 4 meters above the ground at the bottom of the wheel. A couple boards the Ferris wheel and the ride starts. Write a formula for the

asked by help on September 28, 2016
13. ## math

The formula for the surface area of a cylinder is A=2πr^2+2πrh. (A)Solve for r and simplify the result, if possible. (B) If the surface area of a cylinder is 100 square feet and the height is 40 inches, what is the radius of the cylinder in units of

asked by Andrea on April 23, 2018
14. ## Chemistry

Suppose a 500mL flask is filled with 1.6 mol of I2 and 0.40 mol of HI. The following reaction becomes possible: H2(g)+I2(g) -----> 2HI(g) The equilibrium constant K for this reaction is 0.923 at the temperature of the flask. Calculate the equilibrium

asked by Tony on May 13, 2019
15. ## Com170

Analyze why one paragraph was more effective than the other. In my analysis, compare the sentence structure, word choice, punctuation, variety, and the rhythm of both paragraphs. Most consumers understand that a good credit score is vital to one's

asked by Wanda on November 15, 2010
16. ## Physics

At bat a baseball player hits a ball at a height of .889 m. The ball leaves the bat at 51 m/s at an angle of 81 degrees from the vertical. The ball skims the top of a 2.74 m wall as it leaves the field. a.) Draw position, velocity and acceleration graphs

17. ## Physics/Math

Ok...I figured out part a but I am having trouble with b. part a was: Zero, a hypothetical planet, has a mass of 1.0x10^23 kg, a radius of 3.0x10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is

asked by Technoboi11 on March 14, 2007
18. ## science

Chapter 1 & 2 Review Questions 1. Compare and Contrast the two main branches of physical science. 2. Distinguish between scientific laws and scientific theories. 3. Describe the steps of the scientific method. 4. Explain the objective of a consistent

asked by jack on December 13, 2010
19. ## Precalculus

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when

asked by Anonymous on May 24, 2014
20. ## Precalculus...repost.. The tutor didn't quite answ

Calculate the solution set. x^2+y^2+8x=-15 9x^2+25y^2=225 My work: I did elimination...multiplied -25 to the top equation and got..... -16x^2-200x-600...I then used quadratic formula ... And got -7.5 and -5..... Is -7.5 an EXTRANEOUS SOLUTION because when

asked by Anonymous on May 24, 2014
21. ## Chemistry

i need to write to chemical formula for sulphur(II)iodide but both are non metals what do i do and i get confused sometimes cause i don't know when the metal/non metal gets a one charge (for the valences) ex. NiO =Ni1O2 =Ni2O =Nickel(I)Oxide ex. NiF2

asked by Sam on February 16, 2014
22. ## math

Could someone please help me with this problem I don't know how to solve it and I am terrible at word problems. The amount of background noise is important to television news reporters. One station developed the formula N = -t^2 + 12t + 54 showing the

asked by Punkie on January 8, 2010
23. ## Math

A sandwich shop gives a free sandwich after 8 sandwiches are bought in the formula t=s/8+s,t represents the total number of sandwiches received if s sandwiches where bought. Last year julie bought 48 sandwiches. How many sandwiches did she receive last

asked by Jenny on January 20, 2017
24. ## Finance

Veggie Burgers, Inc., would like to maintain its cash account at a minimum level of \$246,400; but expect the standard deviation in net daily cash flows to be \$13,600; the effective annual rate on marketable securities to be 4.8 percent per year; and the

asked by Hans on May 15, 2010
25. ## Chemistry

1. Ammonia gas can be prepared by the following unbalanced equation: _____ CaO(s) + _____ NH4Cl (s) --> _____ NH3(g) + _____ H2O(g) + _____ CaCl2(s) a. Balance the equation. CaO + 2NH4Cl = 2NH3 + H2O + CaCl2 b. Suppose you begin this reaction with 112.

asked by Chelsea on October 18, 2015
26. ## Physics

A stationary block explodes into two pieces L and R that slide across a frictionless floor and then into regions with friction, where they stop. Piece L, with a mass of 2.0 kg, encounters a coefficient of kinetic friction µL = 0.40 and slides to a stop in

asked by COFFEE on February 25, 2007

Thanks Damon for your help yesterday. I see now there are close similarities between the 2 formulas I sighted yesterday. I worked my problem with both formulas and received identical answers of 958.27 NM. This distance is a mile or so more than your

asked by mike on January 18, 2008
28. ## math

Hello! I would be really grateful if you could help me with this word problem. Here is the problem: In a cartoon, a malfunctioning cannon fires a hungry coyote towards the bottom of a cliff with an initial rate of 100 feet per second. If the cliff is 1250

asked by Beth on March 6, 2013
29. ## Math

The Political Noise Problem. The amount of background noise is important to television news reporters. One station developed the formula showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). Use

asked by Confused on November 3, 2009
30. ## FLUID MECHANICS

Air under standard conditions flows through a 5.0 mm-diameter drawn tubing with an average velocity of V = 55 m/s. Assume that the tube is smooth, the air is incompressible and no shear stress occur in the tube. Determine i. the pressure drop in 0.1 m

asked by ANNA on May 3, 2014
31. ## maths

Show that log(1+2+3)=log 1 + log 2 + log 3( with the formula)?

asked by pooja on March 16, 2016
32. ## Chem

Review example 5.10 and exercise 5.10. Suppose 1.58 moles of N2 and 0.420 moles of O2 occupy 22.41 L at a total pressure of 2.00 atm. Use XA = to determine the (decimal) mole fractions of both components. Then, use XA = to determine the partial pressures

asked by Feather on October 11, 2014
33. ## Math

Radiation from the Sunkeeps us all alive, but with the thinning of the ozone layer, it is important to limitexposure. The intensity of radiation is inverselyproportional to the square of the distance thatthe Sun’s rays travel.The formula I=k/d^2 models

asked by Han on October 13, 2014
34. ## physics

A 2000 kg space probe is moving rightward in empty space along the x axis at 12 m/s. One of the probe’s rockets is fired providing a thrust of 1800j N along the y axis. The rocket fires for 1.5 s. How can I derive the equation for the trajectory of the

asked by jon on November 22, 2009
35. ## physics

A 2000 kg space probe is moving rightward in empty space along the x axis at 12 m/s. One of the probe’s rockets is fired providing a thrust of 1800j N along the y axis. The rocket fires for 1.5 s. How can I derive the equation for the trajectory of the

asked by Jon on November 22, 2009
36. ## Please Check My Work: College Physics

Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20 m/s can safely negotiate the curve if the radius of the curve is 200m. * Data: v=20 m/s r=200m *Formula TAN(theta)=v^2/rg *Solution TAN(theta)=(20

asked by Jose Luis on December 3, 2015
37. ## Physics Check My Work Please

Determine the minimum angle at which a roadbed should be banked so that a car traveling at 20 m/s can safely negotiate the curve if the radius of the curve is 200m. * Data: v=20 m/s r=200m *Formula TAN(theta)=v^2/rg *Solution TAN(theta)=(20

asked by Jose Luis on December 3, 2015
38. ## math,help

I have forgotton how to change a decimal into a fraction can you please give me the formula. for example for: -2.75 You just have to move the decimal two places to the right and put it over 100. If you multiply a number by some factor and divide it by the

asked by jasmine20 on January 29, 2007
39. ## Chemistry

Acetylene (C2H2) and hydrogen fluoride (HF) react to give difluoroethane: C2H2+2HF->C2H4F2 When 2.3 mol of C2H2 and 12 mol HF are reacted in a 15.4 L flask, what will be the pressure in the flask at 13°C when the reaction is complete? I know I'm supposed

asked by Dewey on April 16, 2011
40. ## Physics

A circuit has R = 16.6 Ω and the battery emf is 6.50 V . With switch S2 open, switch S1 is closed. After several minutes, S1 is opened and S2 is closed. 1) At 2.14 ms after S1 is opened, the current has decayed to 0.235 A . Calculate the inductance of the

asked by Stesson on March 13, 2018
41. ## physics

An airplane is flying above the Earth's surface at a height of 10.9 km. The centripetal acceleration of the plane is 16.7 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km. Please

asked by Uoit student on November 29, 2016
42. ## Chemistry

Please write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3, reacts with 3,3,4,4,5,5-hexanmethyl-1-hexyne, H-C≡C-C(CH3)2-C(CH3)2-C(CH3)2-CH3 to produce carbon dioxide gas, CO2 , and water gas, H2O When balancing

asked by Amanda on November 8, 2012
43. ## TRIGONOMETRY ASAP!

fountains are designed so that the height and distance the water travels is dependent on θ, the angle at which the water is aimed. for any given angle θ, the ratio of maximum height H of the water to the horizontal distance D it travels is given by the

asked by ceci on April 3, 2012
44. ## Physics

For launching a satellite into orbit around earth, would the proper conservation of energy formula be: Epi + Eki + O work = Epf + Ekf? Would work = 0 for launching a satellite? And, would Epi = -Gm1m2/radius of earth or would it just equal 0 (because we

asked by Anna on February 28, 2013
45. ## physics

In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is 48.2 times the original pressure. What is the temperature of the air after the compression? Ok I know I have the temputure of

asked by Tim on April 27, 2008
46. ## math

The Murphy family just drove 300 miles to visit their grandparents. Mr. Murphy drove 70 mph for 65% of the trip and 35 mph or less for 20% of the trip that was left. Assuming that Mr. Murphy never went over 70 mph, how many miles did he travel at a speed

asked by Katie on October 22, 2014
47. ## MATH

DURING A THUNDER STORM AND LIGHTNING STORM, TO ESTIMATE HOW FAR AWAY THE STORM IS, COUNT THE NUMBER OS SECONDS BETWEEN THE TIME YOU SEELIGHTINING AND HEAR THUNDER. DIVIDE THAT NUMBER BY 5 TO FIND THE DISTANCE IN MILES TO THE STORM. WRITE A SENTENCE TO

asked by MELISSA on August 21, 2008

1. what would you expect the pH value for grapefruit juice to be? (>7, 7,

asked by Anonymous on March 19, 2014
49. ## Chemistry

Hydrogen iodine is a strong acid that is used in chemical synthesis to produce some common drugs as well as a source for iodine, I2. Data for the formation of hydrogen iodine was obtained as shown. The reaction was found to be first order with respect to

asked by Christian on May 20, 2007
50. ## Physics

The magnitude of the momentum of a cat is p. What would be the magnitude of the momentum (in terms of p ) of a dog having two times the mass of the cat if it had the same speed as the cat? What would be the magnitude of the momentum (in terms of p ) of a

asked by BigJoe on June 7, 2012
51. ## Science

What is the mass of saturated solvent of Potassium nitrate at 80degress in 100g of water

asked by Unknown on February 8, 2011
52. ## physics

If motion of a particle of mass (m) is given by y=ut+1/2gt^2 (square).find force acting on it

asked by an on October 5, 2012
53. ## SCIENCE CHECK!

1. One of the products of photosynthesis is carbon dioxide.*** fire. oxygen gas. mass. Am I right?

54. ## Gas Stoichiometry

What mass of ammonia is produced when 3.08 L of nitrogen (at STP) react completely in the following equation?

asked by Jenny on May 6, 2013
55. ## chemistry

Calculate the percent by mass of the solute in each of the following aqueous solutions. (a) 5.10 g of NaBr in 78.2 g of solution

asked by katiy on April 26, 2012
56. ## Physics

How does mass affect the motion of objects falling freely under the influence of gravity?

asked by Lena on April 5, 2009
57. ## Physics

What is the force necessary to accelerate an object with a mass of 115 kg and and an acceleration of 6 m/s2 (squared) east?

asked by George on November 2, 2010
58. ## physics

a bomb of mass 5 kg explodes in to two equel fragments. At what angle these fragment fly apart ?

asked by an on October 5, 2012
59. ## science

a girl on a motorbike passes by at a speed of 15 m/sec.her mass is 40 kg. what is the kinetic energy

asked by sergio on September 19, 2010
60. ## Chemistry

What mass of glucose (C6H12O6) must dissolve in 400.0 g of ethanol to make a 1.60 m solution?

asked by ELissa on March 9, 2017
61. ## Science

A silver picture frame has a volume of 5.97 cubic centimeters and a mass of 59.7 grams

asked by Gabby on February 17, 2017
62. ## chemstry

What mass of sucrose must be taken for solution weight of 200 g, which is equal to molality 0.05 mol / kg?

asked by michelle on November 15, 2012
63. ## chemistry

caculate the mass of agcl precipitated when 0.1g of nacl and 0.1g of agno3 are mixed in solution

asked by anu on July 16, 2011
64. ## Physics

Find the mass of an object with the acceleration 15m/s^2 when an unbalanced force of 90.0N acts on it

65. ## MATH HELP

which of the following is likely to have a mass of 2 kilograms 1.a grown elephant 2. a pineapple 3. a 3 year old child 4. or an acorn

asked by A.J on April 14, 2014
66. ## Physics

A rubber ball of mass 0.12kg is held at a height of 2.5m above the ground, and then released.

asked by Onofiok on February 6, 2016
67. ## Science

The same force acts on two objects with different masses. Why does the object with less mass have a larger acceleration?

asked by Stacy on September 10, 2008
68. ## chemistry

What mass of sucrose must be taken for solution weight of 200 g, which is equal to molality 0.05 mol / kg?

asked by michelle on November 15, 2012
69. ## chemistry

what mass of sodium chloride can dissolve in 14.8g water at 100 degrees Celsius?

asked by michelle on January 3, 2012
70. ## physics

The density of a solid ball with a mass of 231 g and a volume of 110 cm^3 is ____ g/cm^3.

asked by aaron on March 27, 2011
71. ## physics

if a teacher wanted to demonstrate mass in the classroom, which of the following objects should she use? a ruler or an eraser

asked by luckybee on November 26, 2013
72. ## Chemistry

What mass of sucrose, C12H22O11, is needed to make 500mL of a 0.20M solution? Help please... Thanks.

asked by Lucy on November 18, 2007
73. ## Physical science

List the charge, mass, and location of each of the three subatomic particles found within atoms

asked by Anonymous on February 1, 2011
74. ## chemistry

calculate the relativistic mass of 1.81x10^24 photons (3.00 mol) with wavelength of 450 nm.

asked by matt on October 15, 2012
75. ## Physics

Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg

asked by Alexandra on December 13, 2015
76. ## physics

what is the force of gravity on a mass of o.5kg hanging by a string in a beaker of water

asked by kendra on November 30, 2011
77. ## physics

the speed of a bullet of mass is 40gram is 216km/h what is the kinetic energy in joule

asked by dayo on May 29, 2011
78. ## science

Which rider on the triple-beam balance should always be moved first when finding the mass of an object? Why??

asked by chici on September 16, 2007
79. ## Math

Ethan is making 12 dozen cookies.The dough has a mass of 2.2kg.How many grams is that?

asked by Joshua Holt on December 11, 2013
80. ## physics

find the apparent weight of a 18 cm by 12 cm by 6 cm block of concrete with a mass of 1.82 kg that is submerged under water.

asked by james on January 18, 2012
81. ## Chemistry

Calculate the mass of water produced when 9.53 g of butane reacts with excess oxygen

asked by Anonymous on October 24, 2016
82. ## science

a body having a mass of 10kg is moving with velocity of 15m/s.calculate its momentum

asked by raph on November 27, 2015
83. ## physics

Find the density of a substance whose mass is 28 grams and whose volume is 4 cubic centimeters

asked by calis on March 10, 2011
84. ## physics

a 125 cm long string has a mass 2.0g and it is stretched with a tension of 7.0 IN between fixed support

asked by pooja on March 28, 2013
85. ## physics

Calculate the net force needed to give an acceleration of 0,5m/s to a trolley with a mass of 1,5 kg

asked by Ephrime on February 8, 2011
86. ## physics

Three balls A, B, and C, with masses of 3 kg, 1 kg, and 1 kg, respectively, are connected by massless rods. What are the coordinates of the center of mass?

asked by Samuel on October 13, 2008
87. ## chemistry

The density of a gas is 2.0 grams per liter at STP. Its molar mass is approximately?

asked by Crystal on March 5, 2009
88. ## Physics

Find the velocity of a car of mass 1300kg and has kinetic energy of 3800 J.

asked by Selena Uter on March 26, 2012
89. ## chem

What is the mass in grams in Br in 7.20 moles of FeBr2?7.20 mol FeBr2x215.65=1552.68=1553 g/m

asked by Claudett2 on September 30, 2014
90. ## Social Studies

What was Josef Stalin's scapegoat? Im assuming it is the Bolshevik's and he took care of them through mass purging.

asked by Jay on March 21, 2010
91. ## 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?

asked by Jon on December 8, 2010
92. ## marketing

mass marketing is not a viable opttion to build a pfitable brand comment on the following

asked by asmat jahan on September 11, 2011
93. ## science

A piece of metal has a mass of 120 grams.if its volume is 8 cm3.what is its density?

asked by maxine on February 25, 2016
94. ## Chemistry

Calculate the mass of CO2 emitted (in lbs) when 1 gallon of octane is burned

asked by Sara on November 4, 2012
95. ## Science

What mass of water is needed to react completely with the Na2O2? Answer in units of g.

asked by Farrell on March 11, 2015
96. ## Bytco College

Calculate the volume of O2 evolved &mass of KCl formed by decomposition of 30.8 gm KClO3

asked by shweta on August 25, 2015
97. ## Chemistry

What is the binding energy of 1 mole of 239/94 Pu if the mass defect is 0.001896 kg/mol?

asked by Abbie on September 20, 2013
98. ## Chemistry;HELP

How would you do this problem? /: 1. Calculate the density of a material that has a mass of 52.497grams and a volume of 18.5cm^3?

asked by Unknown on March 22, 2013
99. ## physics

Forces of 3 N and 4 N act the right angles on a block of mass 5 kg. Show that the resulting acceleration is 1 m/s².

asked by Anonymous on April 11, 2011
100. ## science

ANSWER to the qestion what is the density of a baseball be if the volume is400mL and the mass is 350g.

asked by peter on March 3, 2013