Question

The molar mass of CaO is 56.08 grams / mole. How many formula units are present in 1.50 moles of

CaO?
Select one:
a. 5.06 x 1025 formula units Cao
b. 84.1 formula units Cao
c. 2.49 x 10-24 formula units Cao
d. 9.03 x 1023 formula units Cao

Answer 1

9.03 x 10²³formula units

Step-by-step explanation:

Given;

Molar mass = 56.08g/mol

Number of moles = 1.5moles

Unknown:

Number of formula units present = ?

Solution:

To solve this problem, we should note that:

1 mole of a substance contains 6.02 x 10²³ formula units

1.5mole of CaO will contain 1.5 x 6.02 x 10²³ formula units

= 9.03 x 10²³formula units