1.

Pick out the correct statements from the following. Also, correct the incorrect statements. a The number of molecules present in 1 mol hydrogen and 1 mol oxygen are same, b. 2 mol chlorine contains 4 x 6.022 x 1023 chlorine molecules. c. The mass of 1/2 mol nitrogen gas is 14 g. d. 0.5 mol water has the mass 9g. There are 6.022 × 1023 H2O molecules in it. (Atomic mass H = 1, O = 16, CI= 35.5, N= 14)

Answer»

Correct statements – a, c 

No. of molecules in 2 mol chlorine is 2 × 6.022 × 1023 

Mass of 0.5 mol water is 9g. So it contains 0.5 × 6.022 × 1023 H2O molecules.



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