# Chemistry

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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?

• Chemistry -

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.

• Chemistry -

He(Helium)

• Chemistry -

use this formula N=PV/RT, then substitute the given quantities. Where, N=m(mass)/M(Molecular Mass).

n= 0.9973684211atm(58.4L)/0.0821(275.5K)

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)

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