Which of these weights most? (i) 32 g of oxygen, (ii) 2 g atom of hydrogen, (iii) 0.5 mole of Fe, (iv) `3.01 xx 10^(23)` atoms of carbon.

Calculate the weight of 12.044 xx 10^(23) atoms of carbon.

Which of the following weighs most (a) 2 gram-atom of oxygen (b) 25 g of Fe (c) 4 xx 10^(23) atoms of carbon (d) 22.4 litres of CO_(2)

If one atom of hydrogen weighs 1.65 xx 10^(-24) g, then mass of one atom of carbon weighs

On analysis of a compund, it was found that it contains (i) 4.08 grams Na (ii) 0.264 mole oxygen atoms (ii) 5.3 xx 10^(22) atoms of carbon. Determine its E.F.