Calculate the number of molecules present in 1 dm3 of hydrogen at STP. – InterviewSolution

1.

Calculate the number of molecules present in 1 dm3 of hydrogen at STP.

Answer»

1 mole of H₂ at STP occupy 22.4 dm³

1 mole of H₂ = 22.4 dm³ =6.022 x 10²³ molecules

22.4 dm³ of hydrogen contain molecules = 6.022 x 10²³

1 dm³ of hydrogen contain molecules = 6.022X10²³ /22.4 = 2.69 x 10²² molecules

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