Chem 3-3

Question 1

Mole

Answer 1

A special unit used by chemists to express amounts of particles. (How many atoms of an element are present)

Question 2

Atomic Number

Answer 2

Amount of protons in the nucleus

Question 3

Molar Mass

Answer 3

The mass of one mole of a pure substance (g/mol) numerically equal to atomic mass

Question 4

Molar mass of Na (sodium)

Answer 4

The same as the average atomic mass found on the periodic table: 22.990g/mol

Question 5

Molar mass of C (carbon)

Answer 5

12.011g/mol

Question 6

Molar mass of NaCl (table salt)

Answer 6

Na = 22.990 g/mol
+
Cl = 35.45 g/mol

NaCl = 58.44 g/mol

Question 7

Molar Mass of CaCO3 (antacid)

Answer 7

40.075 + 12.011 + 15.999(3) = 100.086