A sample of ethane has the same mass as 10.0 million molecules of methane. How many C_2H_6 molecules does the sample contain?

A sample of ethane has the same mass as 10.0 million molecules of meth

1.	A sample of ethane has the same mass as 10.0 million molecules of methane. How many C_2H_6 molecules does the sample contain?
Answer» Solution :Let the number of `C_2H_6` molecules in the sample be n. As given, MASS of `C_2H_6` = mass of `10^7` molecules of `CH_4` `n/("AV. CONST") xx` mol wt. of `C_(2)H_(6) = 10^(7)/("Av. Const") xx` mol. Wt of `CH_(4)` `(n xx 30)/("av. Const") = (10^(7) xx 16)/("Av. const")` `therefore n = 5.34 xx 10^(6)`