Volumes of Gases.
A reaction was found to produce two litres of
What is the mass of 2 litres of chlorine?
1) Find how many moles of chlorine are present in 2 litres.
One mole of
any gas occupies a volume of 24,000
1 litre = 1,000 cm3, 2 litres = 2,000 cm3.
The equation which converts volume into moles is
moles = volume (in cm3) ÷ 24,000
= 0·083 moles of chlorine.
2) What is the mass of 0·083 moles of chlorine?
mole of chlorine gas contains
one mole of chlorine
Each chlorine molecule contains two chlorine atoms,
so use the relative molecular mass. RMM of Cl2 = 71.
mass = moles x RFM
= 5·89 g of chlorine.
So, 2 litres of chlorine has a mass of 5·89 g.
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