composed of element X and H 80% X by mass

composed of element X and H 80% X by mass

 

 

A compound is composed of element X and hydrogen.

Analysis shows the compound to be 80% X by mass,

with three times as many hydrogen atoms as X atoms per molecule.

Which element is element X?

 

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with three times as many hydrogen atoms as X atoms per molecule

---> 실험식 = XH3

 

 

 

X의 몰질량을 x라 두면,

질량비로부터,

X : 3H = 80 : 20 = x : 3

 

x = 80 × 3 / 20 = 12

 

 

 

x = 12 이므로,

X = C, Carbon