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

46,086 questions, page 276
1. ## maths-urgently needed

the diameter of a metallic ball is 14 cm. what is the mass of the ball, if the density of the metal is 6gm per cm^3.(cm cube)?

asked by Anonymous on January 23, 2013
2. ## chemistry

What mass of MgSO4 · 7 H2O is required to prepare 300 mL of a 0.511 M MgSO4 solution?

asked by Anonymous on August 22, 2011
3. ## Chemistry

What mass of MgSO4 · 7 H2O is required to prepare 300 mL of a 0.511 M MgSO4 solution?

asked by Bob Miller on August 22, 2011
4. ## chemistry

What is the molarity of a solution that contains 31.0 HCl in 5.00kg water? (molar mass of HCl=36.46 g/mol)

asked by jim on January 22, 2012
5. ## physics

An acrobat hangs from a trapeze with the tension in both ropes is 315 Newtons.What is the mass of the acrobat?

asked by Anthony on October 2, 2017
6. ## PHYSICAL GEOGRAPHY

WHICH KIND OF MASS WASTING MOST LIKELY LEFT THIS DEPOSIT, A TYPE OF FLOW OR A TYPE OF SLIDE?

asked by LISA on June 20, 2014
7. ## chemistry

if an organic liquid has a density of 1.11 g/mL and has a measured volume of 500. mL, what mass of liquid is present?

asked by lindsey on February 1, 2012
8. ## Chemistry

Calculate the uncertainty in the position (in A) of an electron moving at a speed of (6.5 +/- 0.1)* 10^5m/s. The mass of an electron is 9.109x10^-31 kg. Thanks!

asked by Brittney on May 7, 2012
9. ## chemistry

What mass of NaHCO3 must be added to 100ml H2O to produce a solution with a pH of 10? K1(H2CO3)=4,6*10^-7 K2(H2CO3)=4,4*10^-11 -------- Help! Thank you

asked by Sonia on January 7, 2016
10. ## Chemistry

seawater contains approximately 3.5% NaCl by mass and has a density of 1.02g/mL. What volume of seawater contains 1.0 g of sodium? Please Help!

asked by Anonymous on October 5, 2010
11. ## physics

Your car is broken, so you’re pushing it. If your car has a mass of 868 kg, how much momentum does it have when it’s moving forward at 4.74 m/s (17.1 km/h)?

asked by olga on March 3, 2011
12. ## Chemistry

The temperature of a sample of water increases from 20.1°C to 45.7°C as it absorbs 5675 J of heat. What is the mass of the sample?

asked by Cassie on November 4, 2012
13. ## chemistry

Calculate the mass of zinc oxide when 0.1mole of zinc trioxocarbonate (iv)is heated strongly.

asked by Isaacs' on May 21, 2018
14. ## Chemistry

What is the mass, in grams, of NaCl formed from the reaction of 2.75 mL of a 6.00 M Na2SO4 solution and 8.30 mL of 2.5 M solution of HCl?

asked by Jane on November 23, 2011
15. ## Chemistry

What mass of LiSO4 (110 g/mol) is required to prepare 30mL of 0.20M LiSO4?

asked by Yazmin on October 21, 2012
16. ## earth

if a person's mass is 50 kilograms approximately how much force is exerted on the person at earth surface

asked by force on May 31, 2011
17. ## Science

A block of wood has a mass of 120 g and volume of 200 cm3. What is the density of the wood?

asked by MeMeBigBoy on January 11, 2018
18. ## chemistry

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.6 cm . Its mass is 1.5 kg . Calculate the density of the metal.

asked by sara on August 26, 2015
19. ## physics

Two boxes are seen to accelerate at the same rate when a force F is applied to the first and 5 F is applied the second. What is the mass ratio of the first box to the second?

asked by jane on December 15, 2010
20. ## Chemistry

A gas diffuses 3.98 times slower than H2 at the same temperature and pressure. What is the molar mass of the gas?

asked by Dalaney on April 11, 2017
21. ## Chemistry

In chemistry, for a given substance what information links mass to moles? number of particles to moles?

asked by Ana on March 4, 2010
22. ## physics

A mass of 1000kg is released from a height of 10m.with what energy will it strike the floor?(g=10m/s/s)

asked by Kenoba on February 27, 2012
23. ## Chemistry

The mass of spectrum of 2,4-dimethylpentane shows peaks at m/z 43, 57, and 85. Show the fragments which produce these peaks.

asked by Ryan on March 5, 2015
24. ## AP Chemistry

What is the molality of the solution when you have 48.2 % by mass KBr aqueous solution ? Show each conversion step.

asked by Alex on January 23, 2011
25. ## Chemistry

Calculate the mass of CaCl2 formed when 5 moles of chlorine reacts with chlorine metal?

asked by Bilal mengistie on March 21, 2019
26. ## Chemistry

What mass of sodium oxide is produced from 4.23 grams of sodium and 20 liters of oxygen gas?

asked by Amanda on April 3, 2013
27. ## chemistry

A solution was prepared by dissolving 43.0 of in 225 of water. Calculate the mass percent of in the solution.

asked by help on October 1, 2010
28. ## chemistry

what mass of ethanol could form from fermentation of 90.0g of glucose? what is the percentage yield if 6.0g of ethanol forms?

asked by maliwam on July 11, 2014
29. ## physics

How do you find the total mass of two objects that weigh 111 newtons and 218 newtons?

asked by Jen on May 24, 2012
30. ## chemistry

What mass of silver chloride can be produced from 1.36L of a 0.130M solution of silver nitrate?

asked by samantha on September 30, 2013
31. ## Physics

Venus has a mass of 4.86 1024 kg and a radius of 6.05 106 m. (a) What is the acceleration due to gravity on Venus?

asked by vanessa on February 22, 2018
32. ## physics

A meterstick (L = 1 m) has a mass of m = 0.174 kg. Initially it hangs from two short strings: one at the 25 cm mark and one at the 75 cm mark.

asked by ali on November 18, 2012
33. ## chemistry

If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.54 cm in length be?

asked by kristi on April 10, 2010
34. ## maths --plse help me..

the mass of three bodies is 16000x kg, 250 kg and 3200 kg. find the total weight of three bodies

asked by Anonymous on December 22, 2012
35. ## chemistry to @DrBob222

What is the reason for considering N2 has a boiling point lower than O2,because of its low molecular mass. Just curious about that old reason...

asked by Aanya on July 10, 2017
36. ## chemistry

A generic salt, AB, has a molar mass of 293 g/mol and a solubility of 2.20 g/L at 25 °C. What is the Ksp of this salt at 25 °C?

asked by charles on March 26, 2013
37. ## science

a loaf of bread has a mass of 2000g and a volume of 500 cm3. what is the density of the bread

asked by jazmyn on July 5, 2017
38. ## Chemistry

Calculate the mass percent (m/m) for the solute in 2 grams of KOH in 20.0 grams of H2O? How do I set this up?

asked by Curlyqty on May 5, 2011

5. What is the mass of the water? a. that fills a 1m^3 tank b. that fills a 2L bottle c. that would fill you empty classroom Thanks for your help!

asked by Colin on January 5, 2010
40. ## 7th science

acceleration=force divide by mass . How do you solve 20m/s2 =unknown divide by 0.15kg

asked by marie on January 21, 2012
41. ## physics

What total mass must be converted into energy to produce a gamma photon with an energy of 1.03 × 10^–13 joule

42. ## physics

How do I calculate density of a string with what I have? The string mass is 12g and length is305.4cm

asked by joy on April 20, 2018
43. ## chemistry

If a cube with edges of 1.000 cm weighs 25.68 g, what would the mass of a cube of the same material with sides 2.54 cm in length be?

asked by kristi on April 10, 2010
44. ## ZagaZig University

A coil spring stretches 4 cm when a mass of 500 g is suspended from it . what is the force constant of the spring.

asked by Ahmed Shokry on October 16, 2017
45. ## chemistry

what is the mass of aluminum phosphate needed to create a .25M solution with 650 mL solution?

asked by Shaunice on April 24, 2012
46. ## chemistry

A generic salt, AB, has a molar mass of 293 g/mol and a solubility of 2.20 g/L at 25 °C. What is the Ksp of this salt at 25 °C?

asked by charles on March 26, 2013
47. ## chem

You're asked to prepare 125mL of .0321 M AgNO3. How many grams would you need of a smaple known to be 99.81% AgNO3 by mass?

asked by Anonymous on February 7, 2009
48. ## physics

A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?

asked by Beth on March 19, 2011
49. ## Science

An object of mass 50 kg moves with a speed of 10m/s. Calculate the kinetic energy of the object?

asked by ChaynikA on November 9, 2016
50. ## Physics

You have a mass of 84 kg. How fast (in mph) would you have to run to have the same momentum as an 18-wheeler (m = 28,000 kg) rolling along at 1 mph

asked by Beth on October 18, 2016
51. ## Chemistry

Consider an alloy that is 14.1% copper by mass in tin. Copper makes up what percentage of the atoms in this sample?

asked by Seth on February 12, 2017
52. ## physics

A mass of 6•5 kg has a weight of 20N on a certain planet calculate the acceleration due to gravity on this planet?

asked by boniface on April 7, 2016
53. ## chem

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak acid, but because of security concerns, the actual chemical

asked by help! on February 16, 2009
54. ## Chemistry

A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed with 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many

asked by annie on October 23, 2012
55. ## Chemistry

Aluminum cookware is reffered ti as "anodized aluminum". The anodizing process puts a layer of aluminum oxide on the aluminum, protecting it from corrosion. Consider the reaction of 10.00 grams of aluminum with 10.00 grams of oxygen to form aluminum oxide.

asked by Stacey on February 15, 2009
56. ## Chemistry

According to the following equation if 3 mol of Fe2(CO3)3 are mixed with 20 mol of H+1: Fe2(CO3)3 +6H+1 ==>2Fe+3 + 3CO2 +3H2O A. all the Fe2(CO3)3 will react. B. all of the H+1 will react. C. 3.3 mol ofFe2(CO3)3 will react. D. 1.6 mol of H+1 will remain

asked by Anonymous on October 18, 2006
57. ## Chmistry

For the following reaction, 4.35 grams of hydrogen gas are allowed to react with with 10.3 grams of ethylene (C2H4). hydrogen (g) + ethylene (C2H4) (g) ethane (C2H6) (g) What is the maximum amount of ethane (C2H6) that can be formed? grams What is the

asked by Austin Jekins on December 4, 2010
58. ## Physics

A garden hose takes 14.0 hours to fill a 3500 gallon swimming pool. What is the flow rate of the water in gallons per minute? At this rate, how long would it take the hose to fill an 11,000 gallon pool? I was going to use the formula for flow rate but I

asked by Anonymous on December 6, 2017
59. ## Physics

1) A jetliner, traveling northward, is landing with a speed of 69.3 m/s. Once the jet touches down, it has 787 m of runway in which to reduce its speed to 13.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing

asked by Hannah on May 27, 2012
60. ## physics

At the instant the displacement of a 2.00 kg object relative to the origin is d = (2.00 m) ihat + (4.00 m) jhat - (3.00 m) khat, its velocity is v = - (6.20 m/s) ihat + (2.70 m/s) jhat + (2.60 m/s) khat, and it is subject to a force F = (6.00 N) ihat -

asked by tae on April 23, 2013
61. ## algebra

In a northern European country, the formula y=0.036x 2 −2.8x+62.56 models the number of deaths per year per thousand people, y , for people who are x years old, 40¡Üx¡Ü60 . Approximately how many people per thousand who are 57 years old die each

asked by Anonymous on October 24, 2015
62. ## Chemistry

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if

asked by Mike on February 6, 2015
63. ## Physics

An 103 Newtons box of oranges is being pushed across a horizontal floor. As it moves, it is slowing at an acceleration of -0.9m/s2. The push force has a horizontal component of 20N and a vertical component of 25N downward. Calculate the coefficient of the

asked by job on March 5, 2017
64. ## Chemistry

A tetrahedral site in a close-packed lattice is formed by four spheres at the corners of a regular tetrahedron. This is equivalent to placing the spheres at alternate corners of a cube. In such a close-packed arrangement the spheres are in contact and if

asked by Mike on February 6, 2015
65. ## Science

If James pushed a box with the acceleration of 25 m/s2 with a force of 50N, what is the mass of the box?

asked by klk on November 15, 2010
66. ## Science

A car travelling at 27 m/s2 hits a wall with 48,600 N of force. What was the car's mass?

asked by Nora on November 4, 2011
67. ## gen chem

What mass of Fe3O4 would be needed to react with 1.38 x 103 mol H2? Fe3O4 + 4 H2 -> 3 Fe + 4 H2O

asked by Anonymous on December 14, 2014
68. ## chemistry

what is the mass of 1 mole of carbon dioxide (CO2), and silicon dioxide (SIO2)?

asked by Katie on September 20, 2010
69. ## physics

Suppose I have a spring. I add a mass (m = 1.0 kg) and it is displaced by 15 cm. What is the spring constant k in units of (N/m)?

asked by lisa on November 19, 2010
70. ## Physics

A boy pushes a box of mass 20kg with a for every of 50N.What is the acceleration of the box

asked by Arna on October 15, 2016
71. ## chemistry

What is the mass of water obtained when mix 100.0 mL of 2.5 M. HNO3 with 100.0 mL of 2.55 M. KOH?

asked by charles on July 8, 2014
72. ## chemistry

Estimate the wavelength (in nm) of such a proton moving at 2.81x10^8 m/s (mass of a proton = 1.673x10^-27 kg).

asked by tiny on February 3, 2012
73. ## science

find the force exerted by z rope on a 10kg mass that is hanging from the rope

asked by joe on October 19, 2009
74. ## chemistry

100 mL of water is already in the calorimeter. Use the density of water at 25°C (0.998 g/mL) to determine the mass

asked by marty on June 27, 2011
75. ## chemistry

the number of moles is 0.11 moles and the difference in the mass is 3.1 grams.....identify the gas

asked by Srm on December 6, 2014
76. ## Physical Science

a net force if 7 N acts on a 7 kg mass over a distance of 5m. How much work did this force accomplish?

asked by Sheana on December 11, 2010
77. ## physics

A new planet has been discovered which has a mass of 4.56 x 10^24 kg, and a radius of 7.09 x 10^6 m. What is the gravitational acceleration near the surface of this planet?

asked by Jabari on May 22, 2014
78. ## Chemistry

A sphere of metal has a radius of 5.7 cm and a density of 8.33 g/cm^3. What is the mass of the sphere? Answer in units of g.

asked by G on October 9, 2015
79. ## chemistry

Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone, in mL, has a mass of 29.4 g?

asked by khris on September 16, 2012
80. ## Physics

How do I find Period T(s) and Period^2 T^2 (s^2), given mass(kg) = 0.1 and Average time for ten vibrations (s) = 5.05?

asked by Anne on April 12, 2011
81. ## algebra

A cube measuring 6.7 cm along each edge has a mass of 78g. Find the density of the cube.

asked by Matt on October 14, 2010
82. ## Science

Find the density in g/cm3 of a 1573 cm3 piece of metal having a mass of 46 kg.

asked by Angela on May 14, 2015
83. ## chemistry

I need help Calculating the mass of HCL neede to react with 20.0 grams Zn. Zn+HCL -> ZnCl2+H2

asked by Natalie on February 9, 2009
84. ## physics 1

Q4= The unit of mass in S.I. unit is? a. kilogram b. gram c. tonne d. quintal e. newton

asked by hi bro it's me ( ^_^) himel@,Damon ,Steve,Henry. ,Ms.Sue & all respect sir on November 10, 2016
85. ## Physics

A Styrofoam ball of radius 60 cm falls with a terminal velocity of 8.65 m/s. What is the mass of the ball?

asked by HELP on September 12, 2011
86. ## chemistry121

What mass of silver chloride can be produced from 1.25 L of a 0.264 M solution of silver nitrate?

asked by graciela on October 19, 2011
87. ## Physics

Find tha schwarzschild radius of tha earth ,whose mass 5.98×10^24kg

asked by M salman on October 16, 2018
88. ## Physics

Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

asked by Me on September 13, 2011
89. ## science

if you cut the marble into two equal pieces, what will be the density , mass and volume of one of those pieces.

asked by Ashlee on September 21, 2008
90. ## physics

When your car is moving at 3.33 m/s and car has a mass of 860 kg, how much translational kinetic energy does it have?

asked by olga on February 21, 2011
91. ## Physics

How would the sun's gravitational force on earth change if Earth had twice its present mass?

asked by Allan Berger on October 8, 2009
92. ## Chemistry

the de broglie wavelength of an electron with a velocity of 6.00 x 10^6 m/s is ____m. the mass of the electron is 9.11 x 10^-28g.

asked by Hector on November 2, 2011
93. ## Chemistry

what mass of AgBr is formed when a solution containing 3.45 g of KBr is mixed with a solution containing 7.28 g AgNO3?

asked by David on April 14, 2012
94. ## Science

What is the percentage by mass of glucose in a solution which contains 18gm of glucose and 250 gm of water

asked by Hitesh on July 10, 2017
95. ## chemistry

What mass of KNO3 in grams would be required to prepare 0.6 liters of a 1.8 M KNO3 solution?

asked by Megan on November 29, 2011
96. ## physics

Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

asked by kelly on September 12, 2011
97. ## physics

A ball moving at a velocity of 10 meters/second has a momentum of 8.0 kilogram meters/second. What is its mass?

asked by Anonymous on February 23, 2017
98. ## Physics!!! :)

The escape speed of a particular planet with a radius of 7.500e+6 m is 14,500 m/s. What is the mass of the planet?

asked by Molly on June 24, 2012
99. ## Physics

What acceleration is imparted to a football when the player kicked it with a force of 25 N? Mass of a football = 0.40 kg.

asked by Jenny on September 9, 2016
100. ## Chemistry

Obtain the radius of a sphere of zinc if its mass is 0.23 mg. The density of zinc is 7.14 g/mL. The given formulas are: d=m/v v=(4/3)pi r^3

asked by Jacob on November 3, 2011