The mass number of an element whose atoms have 12 protons and 13
neutrons is _____.
|
a. |
12 |
c. |
25 |
|
b. |
13 |
d. |
12.5 |
One isotope of carbon has 6 protons and 6 neutrons. The number of
protons and neutrons of a second isotope of carbon would be _____.
|
a. |
7 and 6 |
c. |
7 and 7 |
|
b. |
6 and 7 |
d. |
6 and 6 |
According to the law of conservation of matter, if 4.0 g of
hydrogen react with chlorine to produce 146 g of hydrogen chloride, how many
grams of chlorine reacted?
|
a. |
4.0 g |
c. |
146 g |
|
b. |
142 g |
d. |
150 g |
If 9.0 g of water contain 1.0 g of hydrogen, what mass of oxygen
is contained in 36 g of water?
|
a. |
4.0 g |
c. |
10.0 g |
|
b. |
8.0 g |
d. |
32 g |
Which of the following materials cannot be broken down into a
simpler form?
|
a. |
compound |
c. |
mixture |
|
b. |
solution |
d. |
element |
An example of a chemical change is _____.
|
a. |
melting |
c. |
burning |
|
b. |
electrical conductivity |
d. |
density |
An example of a chemical formula is _____.
|
a. |
Na |
c. |
H2SO4 |
|
b. |
4.5 g/mL |
d. |
d = 13.6 g/L |
The density of a material depends on _____.
|
a. |
its mass only |
c. |
its mass and volume |
|
b. |
its volume only |
d. |
its weight |
When ice melts and becomes liquid water, it has undergone a _____.
|
a. |
chemical change |
c. |
physical change |
|
b. |
chemical property |
d. |
physical property |
Gold melts at 1064ºC. Melting point is a _____.
|
a. |
chemical change |
c. |
physical change |
|
b. |
chemical property |
d. |
physical property |
A soft drink is an example of a(n) _____.
|
a. |
compound |
c. |
heterogeneous mixture |
|
b. |
element |
d. |
homogeneous mixture |
In ocean water, salt is a(n) _____.
|
a. |
alloy |
c. |
solution |
|
b. |
solute |
d. |
solvent |