3.12 g of 12C contains Avogadro’s number of carbon atoms.
a) Give the Avogadro’s number.
b) The mass of 2moles of ammonia gas is........
(i) 2g (ii) 1.2x1022g (iii)17g (iv)34g
c) Calculate the volume of ammonia gas produced at STP when 140g of nitrogen gas
reacts with 30g of hydrogen gas.(Atomic mass : N =14u,H=1u)
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