University of New Hampshire

CHEM 403.10

Chapter 1 Practice Problems
1. Which of the following is the correct description of the inside of a grapefruit?
a) It is a pure compound.
b) It consists of a homogeneous mixture of compounds.
c) It consists of a heterogeneous mixture of compounds.
d) It consists of a heterogeneous mixture of elements and compounds.
e) It consists of a single compound in different states.
2. Aspirin is composed of 60.0% carbon, 4.5% hydrogen, and 35.5% oxygen by mass, regardless of its source. What is the
classification of the type of matter aspirin is?
a) Heterogeneous Mixture
b) Pure Substance
c) Homogeneous Mixture
d) Element
e) Compound
3. What is the name of the unit that equals (a) 10–9 gram, (b) 10–6 second, (c) 10–3 meter?
a) nanogram, ng
b) microsecond, ?s
c) millimeter, mm
4. Which of the following weights would you expect to be suitable for weighing on an ordinary bathroom scale?
a) 2.0 × 107 mg
b) 2500 µg
c) 5 × 10–4 kg
d) 4 × 106 cg
e) 5.5 × 108 dg
5. How many picometers are there in 1 m?
1 x 1012 pm in 1 m