Molar Masses

Question 1

Avogadro's number represents the number of units in a mole. What is this value?

Revolt · Accepted Answer

6.02 × 10

Question 2

Silicon (Si):

Revolt · Accepted Answer

28.09 g/mol

Question 3

Calcium (Ca):

Revolt · Accepted Answer

40.08 g/mol

Question 4

Rhodium (Rh):

Revolt · Accepted Answer

102.91 g/mol

Question 5

Use the periodic table to identify the molar mass of each element below. Answer without doing any calculations.Beryllium (Be):

Revolt · Accepted Answer

9.01 g/mol; 28.09 g/mol; 40.08 g/mol; 102.91 g/mol

Question 6

The molar mass of copper(II) chloride (CuCl2) is 134.45 g/mol. How many formula units of CuCl2 are present in 17.6 g of CuCl2?

Revolt · Accepted Answer

7.88 × 1022 formula units

Question 7

The molar mass of barium nitrate (Ba(NO3)2) is 261.35 g/mol. What is the mass of 5.30 × 1022 formula units of Ba(NO3)2?

Revolt · Accepted Answer

23.0 g

Molar Masses Answers