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Question
The ratio between the number of molecules in 2g of hydrogen and 32 g of oxygen is
[Given that H=1,O=16]
Options
1:2
1:0:01
1:1
0.01:1
Solution
Mole in 2g of hydrogen = `"Given mass"/"Molar mass"`
=`2/2` = 1 mol
Mole in 32g of Oxygen = `"Given mass"/"Molar mass"`
= `32/[16 xx 2]` = 1 mol.
Hence the ratio = `"1 mol" /"1 mol"` = 1 : 1
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