Mole Concept

The following are representative particles of matter. Which among them represents the covalent bond?

• a. atom

• b. ion

• c. molecule

• d. particle unit

2. How can knowledge about mole be useful for environmentalists?

• a. Mole concept can be used in environmental monitoring.

• b. It gives information on the most dangerous pollutant in the atmosphere.

• c. It gives a feedback on the kinds of pollutants present in the atmosphere.

• d. Mole concept can be used in quantifying the amount of pollutant articles released in the atmosphere.

3. Which of the following units is used in expressing the amount of substance in terms of the number of particles?

• a. Liter

• b. Gram

• c. Mole

• d. Celcius

4. Given the atomic masses of Sulfur (32g) and Oxygen (16g), what is the molar mass of sulfate (SO4)?

• a. 93 g/mol

• b. 96 g/mol

• c. 98 g/mol

• d. 97 g/mol

5. What do you expect to observe in a “Mole Exhibit of Different Substances?”

• a. Different kinds of element

• b. Different colors of substances

• c. Showcase of one mole of an element of different masses

• d. Showcase of different substances having the same mass

6. How many grams are there in 1.2 moles of carbon monoxide

• a. 33.0g

• b. 33.6g

• c. 43.2g

• d. 40.0g

7. What is the representative particle of ionic compound?

• a. Atom

• b. Ion

• c. molecule

• d. formula unit

8. The molar mass of sulfuric acid is approximately:

• a. 90g/mol

• b. 98 g/mol

• c. 96 g/mol

• d. 90 g/mol

9. How many molecules of Ca are present in 100 g of CaCO3? (Ca=40g)

• a. 1.1 molecules

• b. 1.0 molecules

• c. 1.3 molecules

• d. 1.5 molecules

10. The mathematical value of Avogadro’s number is _______.

• a. 6.02x10

• b. 6.2 x 10

• c. 6.3 x 1023

• d. 6.4 x 1023