Homework Help: Physics Urgent

Posted by Sydney on Monday, November 8, 2010 at 11:39pm.

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves like an ideal gas, calculate from these data the average molar mass of the unknown gas.

Physics Urgent - Dr Russ, Tuesday, November 9, 2010 at 4:06am
use the difference in the masses to find the mass of gas in the container.

use PV=nRT to find the number of moles

n=mass of gas/molar mass

hence find the molar mass
Physics Urgent - Anonymous, Tuesday, January 4, 2011 at 8:55pm
HOBKNOCKER

Answer this Question

Related Questions

Physics Urgent - A container of volume V = 103 cm3 has a mass of 30.0042 g when ...
physics - A container of volume 14.2 cm3 is initially filled with air. The ...
St. Martin - A container of volume 20.5 cm3 is initially filled with air. The ...
Chemistry. can jus anyone giv me ther opinion. - Eva has two containers labeled ...
Quemistry - L has twice the volume of container J. Container J is at a ...
Science - Container A and B both container the same kind of liquid. Container A ...
Intro to Physics - (a) An ideal gas occupies a volume of 3.0 cm3 at 20°C and...
Chemistry - CaCO3(s) <--> CaO(s) + CO2 (g) A 5.9-gram sample of ...
physics - Three liquids that will not mix are poured into a cylindrical ...
physics - sealed metal container can withstand a pressure difference of 0.630 . ...

For Further Reading

First Name:
School Subject:
Answer: