Question

calculate tha percentage of carbon and hydrogen in methane çh4 atomic mass carbon = 12gmol-1 and hydrogen =1.0 gmol - 1
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Answer 1

Answer:

4/16×100=25 %

Explanation:

given-atomic mass of H-1g/mol=1u, C-12g/mol=12u now,formula of methane =CH4,its mass=(atomic mass of carbon +atomic mass of hydrogen ×4)=(12+4×1)=16u, now %of C =given mass of C/atomic mass of methane ×100=12/16×100=75,%of H=4/16×100=25 %