Establish the formula of formic acid if it is known that the mass ratio of hydrogen, carbon and oxygen

Establish the formula of formic acid if it is known that the mass ratio of hydrogen, carbon and oxygen in it is 1: 6: 16

Given:
CxHyOz
m (C in CxHyOz): m (H in CxHyOz): m (O in CxHyOz) = 6: 1: 16

Find:
CxHyOz -?

Solution:
1) Let m (CxHyOz) = 23 r;
2) m (C in CxHyOz) = 6 g;
3) n (C in CxHyOz) = m (C in CxHyOz) / M (C) = 6/12 = 0.5 mol;
4) m (H in CxHyOz) = 1 g;
5) n (H in CxHyOz) = m (H in CxHyOz) / M (H) = 1/1 = 1 mol;
6) m (O in CxHyOz) = 16 g;
7) n (O in CxHyOz) = m (O in CxHyOz) / M (O) = 16/16 = 1 mol;
8) x: y: z = n (C in CxHyOz): n (H in CxHyOz): n (O in CxHyOz) = 0.5: 1: 1 = 1: 2: 2;
9) Formic acid formula – CH2O2.

Answer: The formula of formic acid is CH2O2.