A Sample of CO₂ Has a Mass of 50

Multiple Choice

A sample of CO₂ has a mass of 50.0 grams. What is number of molecules of carbon dioxide in the sample? (C = 12.0 u, O = 16.0 u, and 1 u = 1.66 × 10⁻²⁷ kg.)

A) 4.02 × 10²³
B) 4.95 × 10²³
C) 5.66 × 10²³
D) 6.02 × 10²³
E) 6.85 × 10²³