How many hydrogen atoms are present in 25.3 grams of methane?

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Answer 1 · 2017-07-21T17:49:09

Approx. #4xx10^24# hydrogen atoms............

We work out the molar quantity of methane.....

#"Moles of methane"=(25.3*g)/(16.04*g*mol^-1)=1.584*mol#.

And since there are 4 mole of hydrogen ATOMS per mole of methane......we gots......

#1.584*molxx4*mol*H*mol^-1*"methane"#

#6.33*mol# #"hydrogen atoms......"#

And an actual number of......

#6.33*molxx6.022xx10^23*mol^-1="How many hydrogen atoms?"#