8. How many atoms are present in 100g sample of C-12 atom?
9. How many moles of CaCO, would weigh 5g ?
10.If you require 1.0 x 1023 molecules of nitrogen for the reaction N, + 3H,
i) What is the mass (in grams) of N, required ?
ii) How many moles of NH, would be formed in the above reaction from
molecules of N, ?
iii) What volume would NH, gas formed in ii) occupy at STP ?
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