SCIENCE/CHEMISTRY
11. The symbol for SI unit of mole is __________?

a. m

c. mol

b. mo

d. ml

12. 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 Lorie

consume for 3 days?

a. 0.0252 moles

c. 0.0242 moles

b. 0.0225 moles

d. 0.0235 moles

13. Methane (CH4Molar Mass = 16.04 g/mol) is one of the greenhouse gases. If

32.08 g of CH4 is released in the atmosphere, how many molecules of CH4 are

added in the atmosphere?

a. 1.20 x 1024

c. 6.02 x 1024

b. 1.20 x 1023

d. 6.02 x 1023

14. Ethyl butanoate (C3H7COOC2H5) is the substance responsible for the aroma of

pineapple. What is the molar mass of ethyl butanoate?

a. 118.00 g/mole

c. 120.12 g/mole

b. 117.12 g/mole

d. 116.18 g/mole

15. People usually use hydrogen peroxide (H2O2 Molar Mass = 34.02 g/mole) to clean

their wounds. If Chelsea used 1.0 g of H2O2 to clean her wound, how many moles

of H2O2 did she use?

a. 0.035 mole

c. 0.029 mole

b. 0.030 mole

d. 0.025 mole ​