Question

A sample of ethane, C 2H 6, contains a total of 16 N atoms, where N = 6.02 ´ 10 23. How much C 2H 6 is in the sample?

Answer 1

Answer:

0.8×10

Explanation:

Mass of 1 molecule of CH4=NA16 g

Mass of 1.5×1020 molecules of methane =NA1.5×1020×16g

Mass of x molecules of C2H6 is =NA1.5×1020×16g

We know that mass of 1 molecule of C2H6=NA30g

∴ Number of molecules of ethane (x) =NA1.5×1020×16×30NA=0.8×1020