Answer for this week Chemistry Qn

Ok how come no one answer this week question? :(

You can post your answer in the comments column.

Answer:

(a)

	Oxygen	Carbon	Hydrogen
Percentage	53.33	40.00	6.67
Ar	16	12	1
Mole	3.33	3.33	6.67
Divide by smallest	1.00	1.00	2.00

Empirical formula: CH₂O

(b)

0.2 mol has a mass of 12.0g

Therefore 1 mol will have a mass of (12/0.2) = 60g

Let molecular formula be (CH₂O)_n

Mr of (CH₂O)_n = 60

[12 + 2 + 16] n = 180

                 30n = 60

                     n = 2

Molecular formula = (CH₂O)₂ = C₂H₄O₂