Module 1

Question 0

1b Define: molecule

Answer 0

Two or more atoms linked together to make a substance with unique properties.

Question 1

1a Define: atom

Answer 1

The smallest chemical unit of matter.

Question 2

1c Define: concentration

Answer 2

The quantity of a substance within a certain volume.

Question 4

4. A statue is made out of copper and displayed outside. After many years, what color will the statue be?

Answer 4

The statue will eventually turn a shade of green, just like the copper wire did in experiment 1.1.

Question 4

2. Fifty grams of carbon disulfide can be broken down into 42.1 grams of sulfur and 7.9 grams of carbon. Is carbon disulfide made up of atoms or molecules?

Answer 4

Molecules

Question 5

3. If you put iron near a magnet, the iron will be attracted to the magnet. Rust is made up of molecules that contain iron atoms and oxygen atoms. Rust is not attracted to a magnet. If rust contains iron atoms, and iron is attracted to a magnet, why isn’t rust attracted to a magnet?

Answer 5

When an atom is a part of a molecule, the molecule does not take on the characteristics of the atom. Instead, the atoms in the molecule join together in such a ways to give the molecule it’s own unique characteristics.

Question 6

5. Have scientists actually seen atoms?

Answer 6

No

Question 7

7. If you wanted to measure an objects mass, what metric unit would you use? What English unit would you use?

Answer 7

Mass is measured in grams in the metric system; in the English system, it is measured in slugs.

Question 8

6. Give the numerical meaning for the prefixes “centi,” “milli,” and “kilo.”

Answer 8

Centi- 0.01
Milli-0.001
Kilo-1,000

Question 10

8. If you wanted to measure an objects volume, what metric unit would you use? What English unit would you use?

Answer 10

Volume is measured in liters in the metric system; English system is gallons, pints or quarts.

Question 11

9. If you wanted to measure an objects length, what metric unit would you use? What English unit would you use?

Answer 11

Length measured in meters in metric system, English system is measured in feet, yards, inches or miles

Question 12

10. How many centimeters are in 1.3 meters?

Answer 12

130 cm

Question 13

11. If a person has as mass of 75 kg, what is his or her mass in grams?

Answer 13

75,000 g

Question 14

12. How many liters of milk are in 0.500 gallons of milk? (I gal= 3.78L)

Answer 14

1.89 L

Question 15

13. A meterstick is 100.0 centimeters long. How long is it in inches? (1 in = 2.54 cm)

Answer 15

39.4 inches

Question 16

14. Ozone is a poisonous gas that can build up in the air in dense cities. Thus, there are many environmental initiatives to lower the amount of ozone in the air we breathe. One way you can make ozone, however, is by baking bread. The ice smell you associate with baking bread is actually due, in part, to ozone. If ozone is poisonous, why is baking bread not considered a dangerous activity?

Answer 16

the ozone it produces is not concentrated enough to be dangerous