1.

How many molecules are present in one gram of hydrogen?

Answer»

Hope this HELPS you ___!!

●Hydrogen gas(H2) has a molar mass of 2 g.

●Molar mass of a substance is defined as the mass of 1 mole of that substance. And by 1 mole it is meant a COLLECTION of 6.022*10^23 particles of that substance.

So NUMBER of moles of H2 are 0.5 in this case. And thus it means there are (6.022*10^23)*0.5 particles( here they are MOLECULES) in 1g of H2.



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