A compound has an empirical formular CH2O and molecular mass of 90.

[H = 1.00, C = 12.0, O = 16.0]

A.

C4H10O2

B.

C3H10O2

C.

C3H6O3

D.

C2H2O4

View answer & explanation

Correct answer is C

(CH2O)n = 90; (12 + (1 x 2) + 16)n = 90
(12 + 2 + 16)n = 90; 30n = 90; n = \(\frac{90}{30}\); n = 3
(CH2O)3 = Molecular formula ; = C3H6O3

See all Chemistry questions & answers
See more WAEC questions & answers
Aptitude Tests

Puzzles Questions and Answers

Quantitative Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

Data Interpretation Questions and Answers

Personality Test

Nigeria General Knowledge Questions and Answers

Spatial Reasoning Questions and Answers

Logical Reasoning Questions and Answers

Verbal Reasoning Questions and Answers

Situational Judgement Questions and Answers

Abstract Reasoning Questions and Answers

Typing Speed and Accuracy Test

Microsoft Office Questions and Answers

See all →


View latest jobs in Nigeria today