Chemistry
Calculate.
(a) The vapour density of gas is 11. What would be the volume occupied by 19 g of the gas at STP?
(b) Give the empirical formula of butane.
Stoichiometry
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Answer
(a) Given,
Vapour density = 11
Molecular weight = 2 x vapour density = 2 x 11 = 22 g
Volume of 22 g of gas = 22.4 L
∴ Volume of 19 g of gas = x 19 = 19.34 L
Hence, volume occupied by 19 g of the gas at STP = 19.34 L
(b) Molecular formula of butane is C4H10
∴ Ratio of C and H is 4 : 10
Simple ratio is 2 : 5
Hence, empirical formula = C2H5
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