109 Answered Questions for the topic mass

12/05/21

Three point masses- finding center of mass

Three point masses lie in a plane and are connected by masses rods so that they cannot move relative to each other. The masses and their positions are:m1 = 2.1 kg at (-9 m, -3 m)m2 = 2.6 kg at... more
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11/25/21

C8H18+O2=O2+H2O Stoichiometry
C8H18+O2=O2+H2O a. A liter of gasoline has a mass of about 702 g. What mass of carbon dioxide is produced when 2 liters of gasoline burns? b. How many moles of water will be produced from 1 mole... more
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10/07/21

the mass of butane gas in the gas cylinder
Universal Gas Constant (R) : 0.08206 atm-L/mol-K or 8.314 J/mol-KConsider a gas cylinder with volume of 31200dm3 for storing and shipping pure butane gas (C4H10), it is known that the pressure in... more
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09/19/21

(Physics) Picture suspended on wall by two strings
A picture on a wall is hung up by two strings. String 1 exerted a force T1 with a magnitude of 2.4 N at an angle of 73 degrees above the horizontal. String 2 exerts a force T2 at angle of 47... more
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Mass Chemistry

02/26/21

The mass of glucose that contains a million oxygen atoms and round it to 2 significant digits

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02/05/21

Calculate the densities of both the water and the isopropyl alcohol and the percent error...
The accepted value for the density of water is 1.00 g/mL and the accepted density for isopropyl alcohol is 0.786 g/mL.percent error = experimental density minus accepted density divided by accepted... more
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02/05/21

Calculate the density of the magnet and bolt...
Magnet:Mass (g) = 7.93 gInitial volume of graduated cylinder = 7.00 mLFinal volume of graduated cylinder = 9.00 mLObject volume = 2.00 mLDensity (g/mL) ?Bolt:Mass (g) = 6.61 gInitial volume of... more
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02/02/21

A certain oxide of vanadium is 32.02% oxygen by mass. Determine the empirical formula of this compound.
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02/01/21

Allyl sulfide gives garlic its characteristic odor. Give the mass and number of carbon atoms.
a) The mass in grams of 2.62 mol of allyl sulfide. Answer in scientific notation.b) The number of carbon atoms in 72.8 g of allyl sulfide. Answer in scientific notation.
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01/31/21

Calculate the mass in milligrams of 3.16 × 10 ^ 20 formula units of Bi(NO3)3 · 5H2O. Enter your answer in scientific notation.
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11/21/20

Help me work out density please!!
If you dissolve 52.5 g of salt in 3.45 l of water, what is the density of that solution of salty water? In this particular example, assume that the total volume doesn’t change when salt is added to... more
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09/11/20

Stuck on a density = mass / volume equation
A chemist encounters an unknown metal. They drop the metal into a graduated cylinder containing water, and find the volume change is 3.2 mL. If the metal weighs 2.3 g, what is the density in g/mL... more
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04/20/20

calculating mass/volume at STP
1) What is the mass of 75.0 L of methane gas (CH₄) measured at STP?2) What volume, in liters, will be occupied by 48.8 g of helium gas at STP?3) What volume, in liters, at STP, is occupied by 3.30... more
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11/21/19

Physics Question- Momentum and Impulse
A 52 kg girl rides on a 2.6 kg skateboard. The girl on the skateboard moves at 1.3 m/s. If the girl jumps off the skateboard backwards with a velocity of 1.6 m/s, how fast does the skateboard roll... more
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11/07/19

A 10-lb bag of oats cost $11.00. How much do the oats cost per kilogram
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11/07/19

Lobster is being sold for $20.91/lb. what would be the price of a 0.73kg lobster

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Mass

10/04/19

What is the mass in grams
What is the mass in grams of 4.2 moles of water ?
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Mass Chemistry

09/14/19

Chem: when mass changes
Explain what it means for mass to change.
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Mass Chemistry

09/11/19

Chem: change in mass
Explain what it means to have a change in mass.
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Mass Chemistry

09/11/19

Chem: change in mass
Explain what it means to have a change in mass.
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09/09/19

Chemistry Indiana Jones HMWK
A quantity of sand has a mass of 1200g and a volume of 750cm^3. What is the density of sand?Correct Answer: 1.6 g/cm^3 (which I got) the part I’m confused on is as follows......The volumes of sand... more
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09/09/19

A Density Question for Chemistry
A gold statue has a volume of about 1.5L. How many cm^3 is thismy answer: 1,500cm^3 = rounded to 1 significant figure is (2,000cm^3)apparently its wrong but I don’t know how^^^This then leads to... more
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08/19/19

Can you express 0.000000000000000001994 g in scientific notation form ?

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Mass Prealgebra

05/12/19

Mass Of 3 pineapples and 2 apples is 11.4 kg. Total mass of 2 pineapples and 4 apples is 8.4 kg. Find the mass of 1 pineapple and 1 apple.

Help needed as this is creating problem for my kid.
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04/13/19

Are Newton's "laws" of motion laws or definitions of force and mass?
If you consider [them](http://en.wikipedia.org/wiki/Newton%27s_laws_of_motion) as laws, then there must be independent definitions of [force](http://en.wikipedia.org/wiki/Force) and... more
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