109 Answered Questions for the topic mass


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

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


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


(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

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

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

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.


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

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


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


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


What is the mass in grams

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


Chem: when mass changes

Explain what it means for mass to change.
Mass Chemistry


Chem: change in mass

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


Chem: change in mass

Explain what it means to have a change in mass.


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


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
Mass Prealgebra


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.


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

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.


Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.