If you fail, never give up because FAIL means 'First Attempt In Learning'.— A. P. J. Abdul Kalam

Chemistry — quick quiz

5 real HR Police PC questions on Chemistry. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

HARD

A compound contains 40% carbon, 6.7% hydrogen and 53.3% oxygen by mass. If the molecular mass of the compound is 180 u, what is the molecular formula of the compound? (Atomic masses: C = 12 u, H = 1 u, O = 16 u)