Answer:
mass of Helium = mole of Helium x Molarmass of Helium
Explanation:
Mole of Helium = volume of Helium/ 22.4dm^3/mol
= 7.00 x 10^2/22.4
= 31.25mol
Mass of Helium = mole of Helium x Molarmass of Helium
= 31.25mol x 4g/mol
= 125g
The expression that should be used is
[tex]mass\ of\ Helium = mole\ of\ Helium \times Molarmass\ of\ Helium[/tex]
Mole of Helium should be
[tex]= volume \of\ Helium\div 22.4dm^3/mol\\\\= 7.00 \times 10^2\div 22.4[/tex]
= 31.25mol
Mass of Helium
[tex]= mole\ of\ Helium \times Molarmass\ of\ Helium\\\\ = 31.25mol \times 4g/mol[/tex]
= 125g
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