1-20 Interpret formulas of molecules and polyatomic ions

1-20-1. How many electrons are in a sulfur trioxide (SO₃) molecule and a sulfite ion (SO₃^2-)?
A. 40, 40,
B. 40, 42,
C. 38, 40,
D. 78, 80

1-20-2. How many hydrogen atoms are in 5 molecules of acetic acid (CH₃COOH)?
A. 3, B. 4, C. 15, D. 20