University:
Miami University
Course:
CHM 141 | College Chemistry
Academic year:

2021
Views:

291

Pages:

1
Author:

Leilani Contreras

Name: ______________________________________________ Period:______ Date:____________ Atoms and Molecules Exit Quiz Answers 1. For each of the substances in the table below, decide if they are an example of a molecule (M) or both a molecule and a compound (MC). Substance M or Substance MC? MC? Carbon dioxide (CO2) MC Fullerene (C60) M Salt (NaCl) MC Sand (SiO2) MC Sulfur (S8) M Baking soda (NaHCO3) MC Hydrogen gas (H2) M Glucose (C6H12O6) MC 2. For each of the following substances, give the total number of atoms: a) M or 2 molecules of carbon dioxide (2CO2) Carbon (C) = 1 Oxygen (O2) = 2 Total for 1 molecule = 1 +2 = 3 Total for 2 molecules = 2 x 3 = 6 b) 3 molecules of nitric acid (3HNO3) Hydrogen (H) = 1 Nitrogen (N) = 1 Oxygen (O3) = 3 Total for 1 molecule = 1 +1 +3 = 5 Total for 3 molecules = 3 x 5 = 15 3. Give the number of oxygen atoms in: a) Rust (FeO3) O3 = 3 oxygen atoms b) 2 molecules of aspirin (C9H8O4) O4 = 4 oxygen atoms in 1 molecule 2x4=8