Answer the following questions. Write the CAPITAL letter of the best answer on the space provided. DON'T FORGET TO WRITE YOUR NAME AND SECTION. 1. It is defined as the amount of substance that has the same number of particles (atoms, molecules, lons, or formula units) as the number of atoms present in exacity 12 grams of the isotope carbon-12 A Ounce B Gram C. Kilogram D. mole 2. What is the standard unit for the amount of substance? A mole B. Gram C. Kilogram D. ounce 3. What is the exact mass of carbon-12 isotope which is used establish the value of mole? A 120 g B. 12g C. 12 kg 4. How many particles are equal to 1 mole? D. 1.2 kg A 6.02 x 1022 particles C 6.02 x 10 particles B. 6.02 x 103 particles D. 6.02 x 10 particles 5. The value of mole is named after an Italian mathematical physicist Who is this scientist? A Ernest Rutherford C. Niels Bohr B. Amedeo Avogadro D. Werner Heisenberg) 6. Which statement is incorrect about mole? A Mole describes the amount of substance. B. The symbol for mole is m C. The abbreviation of this unit is mot. D. Mole day is celebrated every October 23, 7. What term refers to the weighted average of the masses of an atom's naturally occurring isotopes? A atomic mass B. molar mass 8. What is the unit of molar mass? B. g/mol C. formula mass D. molecular mass C. mol 9. The following are representative particles of matter, which Ag among them represents a covalent compound? A alom B. molecule 10. What is A atom B. molecule C. ion D. particle unit the representative particle of ionic compounds? C. lon D. formula unit 11. What mathematical operation is performed between mass molar mass when converting mass to moles? A. addition C. multiplication D. subtraction B. division 12. What do we do with a given number of moles if we want to convert it to mass? A add to molar mass B. multiply by molar mass C. divide by molar mass D. subtract to molar mass 13. How many percent of oxygen (O) is present in water (H₂O)? A 12% B. 89% C. 11% D. 75%​