exam 3: 4.1 (number of atoms and molar mass)

Question 1

what is 1 mole of lithium?

Answer 1

6.94 g

Question 2

Calculate the molar mass of Mg(NO3)2

Answer 2

148.33 g/mol

(1) 24.31 g Mg
(1) 14.01 g N
(6) 16.00 g O

Question 3

Calculate the molar mass of C2H6O?

Answer 3

46.08 g/mol

(2) 12.01 g C
(6) 1.01 g H
(1) 16.00 g O

Question 4

Calculate the molar mass of ammonium chloride

Answer 4

NH4+(Cl) = 53.50 g/mol

(1) 14.01 g N
(4) 1.01 g H
(1) 35.45 g Cl