1.

Which of the following pair is invalid ?

Answer»

32g oxygen = `6.022 xx 10^(23)` molecules of oxygen
23 g SODIUM = `6.022 xx 10^(23)` molecules of sodium
24g carbon = `6.022 xx 10^(23)` ATOMS of carbon
1 g hydrogen atom = `6.022 xx 10^(23)` atoms of hydrogen

Solution :24 g carbon = 2 MOLE C
`= 2 xx 6.022 xx 10^(23)` C atoms


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