# Chemistry

posted by .

What mass of CH4 is contained in a 443 mL sample of CH4 at −32◦C and 282 torr?
I tried so many times and I don't get it!

• Chemistry -

Use PV = nRT and solve for n.
P = (282/760) atm
V = 0.443 L
R = 0.08206 L*atm/mol*K
T = -32+273 = ?K
Solve for n = number of mols. Then
mols = grams/molar mass You know mols and molar mass, solve for grams.

## Similar Questions

1. ### Chemistry

It takes bromine vapor 4.73 min to effuse through a pinhole of a container. How long will it take CH4 gas to effuse under the same temperature and pressure?
2. ### CHEMISTRY

How many grams of CH4 are required to produce 43 g of Cu according to the following equation: 4CuO + CH4 --> CO2 + 2H20 + 4Cu?
3. ### Chemistry

What ratio is used to carry out each conversion?
4. ### chemistry

A 10.00g sample of a mixture of CH4 and C2H4react with O2 at 25C and 1 atm to produce CO2 and water. If the reaction produces 520kJ of heat what is the mass percent of CH4 in the mixture?
5. ### chemistry

CH4 + 2O2 = CO2 + 2H2O Starting with 13.6 g of CH4, calculate the mass in grams of CO2 produced if there is enough O2 gas to react with all of the CH4
6. ### Chemistry

Given PV=nRT and the following equation: CH4+2O2=CO2+2H2O Calculate the maximum number of ML of CO2 at 750 torr and 295.15 degrees K that can be formed from above conbution of methane ( CH4 ) if 450 mL of methane at 705 torr and 283.15 …
7. ### Chemistry

A sample of oxygen is collected in a 387 mL container over water at 15◦C, and the barom- eter reads 738 torr. What volume would the dry gas occupy at 781 torr and 15◦C?
8. ### Physical Science

How many CH4 molecules are contained in a 50gram sample of CH4 gas?
9. ### chemistry

A typical bathtub can hold 106 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 56 ◦F to 87 ◦F. Assume that the natural gas is pure methane (CH4) …
10. ### Chemistry

1. A typical bathtub can hold 102 gallons of water. Calculate the mass of natural gas that would need to be burned to heat the water for a tub of this size from 63 ◦F to 98 ◦F. Assume that the natural gas is pure methane …

More Similar Questions