General, Organic, Biological Chemistry: Structures of Life

Karen C. Timberlake

Chapter 3 Matter and Energy - all with Video Answers

Educators

Section 1

Classification of Matter

01:20

Problem 1

Classify each of the following as a pure substance or a mixture:
a. baking soda $\left(\mathrm{NaHCO}_{3}\right)$
b. a bluebery muffin
c. ice $\left(\mathrm{H}_{2} \mathrm{O}\right)$
d. $\operatorname{rinc}(Z n)$
e. trimix (oxygen, nitrogen, and helium) in a scuba tank

Crystal Wang

Numerade Educator

02:52

Problem 2

Classify each of the following as a pure substance or a mixture:
a. a soft drink
b. propane $\left(\mathrm{C}_{3} \mathrm{H}_{8}\right)$
c. a cheese sandwich
d. an iron (Fe) nail
e. salt substitute (KCl)

Edward Zhang

Numerade Educator

02:07

Problem 3

Classify each of the following pure substances as an element or a compound:
a. a silicon (Si) chip
b. hydrogen peroxide $\left(\mathrm{H}_{2} \mathrm{O}_{2}\right)$
c. oxygen $\left(\mathrm{O}_{2}\right)$
d. rust $\left(\mathrm{Fe}_{2} \mathrm{O}_{3}\right)$
e. methane $\left(\mathrm{CH}_{4}\right)$ in natural gas

Edward Zhang

Numerade Educator

02:37

Problem 4

Classify each of the following pure substances as an element or a compound:
a. helium gas (He)
b. mercury (Hg) in a thermometer
c. sugar $\left(\mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\right)$
d. sulfur (S)
e. lye (NaOH)

Edward Zhang

Numerade Educator

02:08

Problem 5

Classify each of the following mixtures as homogeneous or heterogeneous:
a. vegetable soup
b. seawater
c. tea
d. tea with ice and lemon slices
e. fruit salad

Edward Zhang

Numerade Educator

01:55

Problem 6

Classify each of the following mixtures as homogeneous or heterogeneous:
a. nonfat milk
b. chocolate-chip ice cream
c. gasoline
d. peanut butter sandwich
e. cranberry juice

Edward Zhang

Numerade Educator