what is mass of oxygen will contain the same number of molecules as : (1) 1mole of hydrogen . (2) 9 g of water (3) 6.022 × 10^22 molecules of carbon dioxide

what is mass of oxygen will contain the same number of molecules as :

1.	what is mass of oxygen will contain the same number of molecules as : (1) 1mole of hydrogen . (2) 9 g of water (3) 6.022 × 10^22 molecules of carbon dioxide
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