How many molecules of hydrogen are present in 112 mL of a gas at NTP?

Solution

22400 space mL space space straight H subscript 2 space gas space identical to space 6.02 space cross times space 10 to the power of 23 space molecules

112 space mL space space straight H subscript 2 space gas space identical to space space fraction numerator 6.02 space cross times space 10 to the power of 23 over denominator 22400 end fraction cross times space 112 space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 3.01 space cross times space 10 to the power of 21 left parenthesis molecules right parenthesis

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