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

46,086 questions, page 277
1. chemistry

What is the molar mass of an acid if 0.422 g of the acid are neutralized by 17.5 mL of 0.268 M NaOH?

asked by sha on November 23, 2017
2. general chem

How much heat is released whena mass of 125 g with a specific heat of 4.11 J/g C increases from 23.2 C to 34.9 C?

asked by Anonymous on March 13, 2011
3. Chem 130

What mass of CO2 could be absorbed by 1.37 g of CaO? What volume would this CO2 occupy at STP?

asked by michelle on May 6, 2014
4. Chemistry

Acetone is a common solvent and has a density of 0.7899 g/mL. What volume of acetone has a mass of 28.7g

asked by Jackie on January 20, 2017

Caculate the mass of zinc chloride produced from 19.2tones of zinc oxide

asked by edna on June 19, 2015
6. Math,Word problems(algebra)

Kai Ling has 4m kg of flour.She bought 2 more packets of flour, each of mass m kg.How much does she has now in terms of m? Please help me

asked by kimi on September 23, 2011
7. 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 Annie on April 10, 2011
8. Physical Science

Find the density in g/cm3 of a 800 cm3 piece of metal having a mass of 4 kg.

asked by Alex on September 5, 2012
9. Science

The density of pure silver is 10.5 g/cm3. What is the mass of a sample with the volume of 10.0 cm3?

asked by Jewel on November 2, 2015
10. Physics check

In a nuclear reaction where energy is released, which has more mass, the products or the reactants? The reactants?

asked by Emily on April 25, 2008
11. Physics

A boy has a mass of 45 kg and is running with a velocity of 8 m/s. Find the boy's kinetic energy.

asked by angela on October 17, 2011
12. science

a chunk of lead has a volume of 45cm^3 and a mass of 510g. What is the density of lead.

asked by zane on November 19, 2015
13. chemistry

A saturated solution of kno3 at 70°c is cooled to 10°c. What mass of a solid of precipitate out of solution.

asked by Riana on December 19, 2012
14. Physic

If the specific gravity of ice is 0.92, what is the mass of one cubic meter of ice in grams?

asked by Ty on March 15, 2012
15. physics

At a temperature of 0° C, the mass and volume of a fluid are 742 kg and 1.10 m3. The coefficient of volume expansion is 1.36 10-3(° C)−1

asked by Anonymous on November 24, 2010
16. Science

What is the density of a cylinder if the cylinder is 3.5 cm long and 4cm in diameter and has a mass of 120 g

asked by Alex on January 22, 2011
17. physics

a copper cylinder 1.50 m long and 40.0 cm in diameter stands on one end.what is the mass of the cylinder?

asked by ---- on January 10, 2012
18. physics

an object accelerates at 0.8m/s2 when a resultant force of 200n is acting on it what is the mass of the object

asked by james on November 13, 2012
19. science

when brought to the surface of the moon will a mass have more or less weight than it did on the surface of earth or stay the same ?

asked by Blaire on October 8, 2010
20. Science

28cm3 of a gas weighs 0.4g at STP.Calculate the molecular mass of the gas.

asked by David on January 17, 2017
21. chemistry

The vapour density of a gas is 22.4 and mass is. 22.4grams.what is the volume occupied the gas at N .T .P ?

asked by nayan das on May 9, 2014
22. Chemistry

A lead fishing weight cotains 0.12 mol of lead atoms. What is its mass?

asked by Denise on October 10, 2016
23. physics

The car has a mass of 1200kg Calculate the kinetic of the car when it travels at a speed of 12 m/s.

asked by Dan on February 16, 2012
24. chemistry

What mass of iodine would react with 48 grams of magnesium to make magnesium iodide?

asked by juliana on October 8, 2016
25. Physics

A plane with a mass of 4.50 x 10^3 kg accelerates on takeoff at 10.0 m/s2. What is the net force acting on the plane?

asked by Sarah on May 9, 2017
26. Physics

An elastic cord vibrates with a frequency of 2.7 Hz when a mass of 0.56 kg is hung from it. What will its frequency be if only 0.43 kg hangs from it?

asked by Anonymous on January 27, 2010
27. Chemistry

A serving of Doritos has 17 g of carbohydrates. What is this mass in units of ounces? (16 ounces = 453.6 g)

asked by Ryane on September 19, 2017
28. chemistry

Water has a density of 0.997 g/mL at room temperature (25 C). If you have exactly 500 mL of water, what is its mass in kg?

asked by bobby on May 4, 2015
29. Chemistry

What is the mole fraction of ethanol, C2H5OH, in an aqueous solution that is 50.0% ethanol by mass?

asked by Devon on August 22, 2016
30. Science

By what factor would your weight change if the earth's diameter were doubled and its mass were also doubled? Thanks :)

asked by Catherine on May 14, 2011
31. Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

asked by Anonymous on January 16, 2014
32. 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
33. Chemistry

How do I find the volume in L, of aluminum if the mass is 25.25g and the density of aluminum is 2.70g/Ml?

asked by Patty on February 6, 2011
34. Physics

a soccer ball kicked with a force of 14.1 N accelerates at 6.8 m/s^2 to the right. What is the mass of the ball? in units of Kg.

asked by Nancy on November 19, 2010
35. Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

asked by Anonymous on January 16, 2014
36. Chemistry

the density of Fe2O3 is 5.343g cc. What is the mass volume concentration of iron in Fe2O3

asked by jay on October 16, 2013
37. Physics

A car that slows down uniformly from 20 m/s to 5 m/s has an impulse of 30,000 kg m/s. Determine the mass of the car

asked by Jut on March 6, 2015
38. 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
39. Intro to Chemistry

How do you determine the mass of NACL needed to prepare 25.00 ml of a 1.585M NaCl Solution?

asked by Jenny on November 19, 2012
40. chem

density of 20% by mass C2H6O2 solution in water is 1.03 g/mL. find the molarity of the solution.

asked by lily on July 21, 2011
41. Chemistry

what's the density of a cube of an unknown substance if mass is 45.2g and the side of a cube is 3.2cm?

asked by Nick on October 24, 2013
42. math

the mas of a boulder is 48,567 kilograms . what is the mass of the boulder in metric tons?

asked by on February 5, 2019
43. chemistry

what will be the mass of angydrous Alum left over if one starts with 100.00 g of hydrated Alum?

asked by Jay on October 21, 2010
44. physics

How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.

asked by Anonymous on March 10, 2013
45. physics

if a person is pushing a cart with a force of 40 Newtons and it accelerates at 0.5 m/s2 , what is the mass of the cart ?

asked by ariel on April 13, 2012
46. physics

How far from the center of the Earth must a 90 kg astronaut be in order for them to weigh 90 N? The mass of the Earth is 6 x 1024 kg.

asked by Anonymous on March 10, 2013
47. Physics

A spring vibrates at 8Hz,when a mass of 0.82kg is hung from it.What is the spring constant?

asked by Pius on April 25, 2012
48. physical science

If the mass of a plane is 2,500 kg and the net force on it is 14,000 N, what is the plane's acceleration?

asked by Annabeth on May 14, 2013
49. Physics

1) what does the y intercept on a force vs acceleration graph represent? 2)what is the relationship of mass and acceleration?

asked by Aly on October 30, 2013
50. Physics 20

A plane with a mass of 4.50 x 10^3 kg accelerates on takeoff at 10.0 m/s2. What is the net force acting on the plane?

asked by Cassandra on May 5, 2017
51. chemistry

What is the molality of 67.1g of Nano3 in 2.5l of water i get the molar mass of nano3 and divide it by the 67.1g and multipy it by 2.5l

asked by dd on December 12, 2014
52. chemistry 2 college

explain how to find the mass of solute in the solution: 50.0g of solvent in a 10.0% NaCl solution?

asked by deedee on March 24, 2013
53. Chem 1510

A urine sample has a mass of 157 g and a density of 1.030 g/mL. What is the volume of this sample?

asked by Anonymous on January 16, 2014
54. Phystcs

How does the force between two objects change when the mass of one object and distance between the two object are doubled.

asked by Anupam khatiwara on August 1, 2012
55. chemistry

what is the percent by mass of NaHCO3, in a solution containing 20 g NaHCO3 dissolved in 600 mL H20

asked by rocky on July 14, 2011
56. urgent (physics)

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

57. chemistry.

The molecular of aspartame, the generic name of Nutrasweet, is C14H18O5. The molar mass of aspartame is?

asked by Jimmy on September 25, 2009
58. Physics 1

Two small particles of mass 16 kg and 27 kg are a distance 1.4 m apart. What is the gravitational force of one of these particles on the other?_____N

asked by John on October 3, 2012
59. Physics

A mass of .27 kg is attached to a spring and is set into vibration with a period of .39s.what is the spring?

asked by Emily on March 24, 2012
60. science

A force of 20 n gives a ball an acceleration of 4.0 m/s3 on a lever frictionless surface. what is the mass of the ball?

asked by Joey on June 17, 2014
61. physics

how much work (J) is done by friction when the mass is 150 kg and dragged for 10 m if the coefficient of sliding friction is .3?

asked by Jamie on February 4, 2013
62. Astronomy

What do you need to know in order to calculate the mass of a planet from observations of a satellite in orbit around that planet?

asked by Frances on October 2, 2011
63. chem

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

asked by Anonymous on February 27, 2011
64. Chemistry

Calculate the mole fraction of Benzene in a solution containing 30% by mass of Benzene in CCl4?

asked by Gash on March 2, 2019
65. Chemistry

An alloy contains 39.5 mass% silver (Ag) and has density og 7.86 g/ml What volume of alloy would be needed to contain 12.0g of pure Ag?

66. science

When determining the mass of an atom, the electrons are not considered. Why can scientists disregard the electrons?

asked by me on February 4, 2009
67. Physics that you probably know and i don't

The tension in the above string is 89.6 N. Calculate the mass of a 4 m long piece of the steel string.

asked by College student in need of help on March 31, 2011
68. chemistry

Calculate the mass of solute of hydrogen peroxide in a 35% solution if 450 ml of solution is being used

asked by Emmee on February 22, 2012
69. science

Gravitational force =mass x 9.8m/s2 what is the force of a polar bear weighing 1500kg?

asked by amanda on December 5, 2016
70. chamistry

how do you calculate the mole fraction of HCl in an acqueous solution that contains 33.6% HCl by mass?

asked by franco on February 23, 2011
71. science (physics)

A 980 N box has a mass of 100 kg. What is the acceleration of the box due to gravity?

asked by meme on January 24, 2013
72. Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

asked by stewart on April 24, 2014
73. Scienc

World poplation grow each year,does this mean the mass off earth increases each year? Why?

asked by Nazharia Zehr on October 25, 2007
74. Physics

the sun's mass is 1.99*10^30 kg and it has a radius of 6.96*10^8 m.What is the Sun's gravitational field strength at its surface.

asked by Anonymous on October 26, 2009
75. Chemistry

What mass of N2O5 will result from the reaction of 6.0 mol of NO2 if there is a 61.2% yield in the reaction?

asked by Brya on May 27, 2013
76. physics

Forces of 8.85 N and 2.21 N act at right angles on a stack. What is the mass of the stack if it accelerates at a rate of 4.4 m/s^2?

asked by i need help on October 8, 2013
77. chemistry

80.0 g of iodine (v) oxide reacts with 28.0 g of carbon monoxide determine the mass of iodine

asked by Anonymous on April 12, 2010
78. 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 tiffany on November 18, 2010
79. Chemistry

Hg + I2 -> HgI2 Whats the mass of HgI2 if you have 0.7236g mercury and 0.3264g iodine?

asked by Anonymous on February 6, 2013
80. chemistry

80.0 g of iodine (v) oxide reacts with 28.0 g of carbon monoxide determine the mass of iodine

asked by Anonymous on April 12, 2010
81. Physics

the sun's mass is 1.99*10^30 kg and it has a radius of 6.96*10^8 m.What is the Sun's gravitational field strength at its surface.

asked by Anonymous on October 26, 2009
82. chemistry

A 2.3g sample of MgX is reacted with NaOH. The Mg(OH)2 precipitate had a mass of 1.8g. What is the % of Mg in the original sample?

asked by corey on October 15, 2007
83. Physics

The acceleration due to gravity on Earth is 9.80 m/s2. If the mass of a dog is 40.0 kg, what is the weight of the dog?

asked by Jane on April 18, 2014
84. physics

A spring extends 10 cm whena mass of 100g is attached to it, when is the spring constant

asked by boikobo on July 7, 2016
85. science

what must be the density of an object with a mass of 5000 grams if the object is to float in water?

asked by John on January 25, 2010
86. Physics

Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons.

asked by Anonymous on January 31, 2013
87. Physics

A certain planet is located 3.54 x 10^11 m from its sun. If its orbital period is 4.9 x 10^7 s, find the mass of its sun.

asked by Anonymous on April 24, 2014
88. Physics

Two planets of mass 7 x 10^25 kg are release from rest 2.5 x 10^12 m apart. What is the speed of the planets when they are half this distance apart?

asked by Anonymous on August 4, 2015
89. chemistry

air has an average molar mass of 29.o g/mol. The density of air at 0.97 atm and 30. C is

asked by lnkin on December 12, 2011
90. science

an unknown metal has a volume of 20cm^3 and a mass of 54g. Identify the metal

asked by Matthew on April 11, 2010
91. science

Which has more mass and volume, a cup of popped popcorn or a cup of cooked rice?

asked by Darion on May 5, 2009
92. Chemistry

2 NO + 2 SO2 → 1 N2 + 2 SO3 Determine the mass (in g) of N2 that would be produced when 5.28×10-3 g of SO2 reacts with an excess of NO.

asked by Mackenzie on October 25, 2015
93. physic

The acceleration due to gravity on the moon is 1.6/se. What does a 10kg mass weigh on the moon?

asked by monquie on February 2, 2016
94. science

A cube has each edge equal to 2cm.Mass of cube is 20.8 g.what is its volume and density

asked by manminder on May 31, 2017
95. physics

a 0.20 kg mass is attached to the end of a spring causes it to stretch 3cm. what is the spring constant?

asked by Anonymous on June 5, 2012
96. Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

asked by Margaret on October 8, 2013
97. Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

asked by Margaret on October 8, 2013
98. Chemistry

10.7L of a gas at 1.75 atm are expanded to 20.0L at a mass constant temperature.what the new gas pressure?

asked by Margaret on October 8, 2013
99. Chemistry conversions check

I'm sooooooo not sure if I'm doing this right, but can someone check it please? Thanks :)) 5) Determine the mass in grams of 3.01 x 10^23 atoms of Cl (element) I got 17.5 grams...is this right?

asked by Emily on September 10, 2009
100. science

how do i calculate the mols of sulfuric acid ? mols = grams/molar mass

asked by Deon on February 7, 2007