posted by Kitty .
An elemental gas has a mass of 10.3 g. If the volume is 58.4 L and the pressure is 758 torre at a temperature of 2.5 degrees C, what is the gas?
Use PV = nRT to solve for n = mols, then
n = mols = grams/molar mass
You know n and grams, solve for molar mass, then identify from that. I think you can use the periodic chart for that.
use this formula N=PV/RT, then substitute the given quantities. Where, N=m(mass)/M(Molecular Mass).
Solution and Answer
n= 2.575 mol.
Given: 10.3 g
10.3g÷2.575mol= 4 g/mol. Then look at your periodic table, where you can find the value of 4 g/mol in the element of He(Helium)