1. How many particles are equal to 1 mole?
A. 6.02 x1022 particles.
C. 6.02 x1024 particles
B. 6.02 x 1023 particles
D. 6.02 x 1025 particles

2. The following are representative particles of matter. Whích among them represents a covalent compound?
A. atom
B. ion
C. molecule

3. How can the 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-particles released in the atmosphere

4. Which of the following units is used in expressing the amount of substance in terms of the number of particles?
A. liter
C. mole
D. Celsius
B. gram

5. What do you expect to observe in a "Mole Exhibit of Different substances?
A. different kind of elements
B. different color of substances
C. showcase of 1 mole of different elements having different masses D. showcase of I mole of different substances having the same masses

6. What is the representative particle of ionic compounds?
A. atom
B. ion
C. molecule
D. formula unit

7. How many particles are there in one mole of any kind of substance?
A. 3.01 X1023
C. 3.01 x 1024
B. 6.02 v1023
D. 6.02 x 1024

8. Why is mole concept important?
A. it is useful in when converting between grams of atoms or molecules
B. gives us convenient way to express large numbers
C. it can be applied to any type of particle representative
D. all of the above

9. Calcium carbonate (CaCO3 Molar mass=100.09 g/mole) is an antacid used to neutralize extra acid in the stomach. Lorie is prescribed by the doctor to take 250mg- tablet of CaCO3 three times a day. How many moles of CaCO3 will consume for 3 days?
A. 0.0252 moles
C. 0.0242 moles
B. 0.0225 moles
D. 0.0235 moles

10. Who is the proponent of Avogadro's number, an Italian chemist and physicist? A Amado Avogadro
B. Amador Avogadro
C. both a and b
D. Amedeo Avogadro​