Module 3.2 Moles

Question 1

Mole stands for ?

Answer 1

Molecular Weight (MW)

Question 2

Moles and grams are related based on the ?

Answer 2

Molecular Weight of a compound

Question 3

The number of grams in a substance will always be greater than the number of ?

Answer 3

Moles

Question 4

To go from Moles to grams you ? by the ?

Answer 4

Multiply

Molecular Weight

Question 5

To go from Grams to Moles you ? by the ?

Answer 5

Divide

Molecular Weight

Question 6

What is the MW (Moles)

10grams of Ca₃(PO₄)₂

Answer 6

First find the MW (previous module)
MW = 310.18
We are given the grams and need Moles
Larger (grams) to smaller (moles) we divide 10g / 310.18 = 0.03224 moles

Question 7

What is the Grams of

0.152 moles of Na₂SO₄

Answer 7

First find the MW (previous module)
MW = 142
Going from smaller (Moles) to larger (Grams) so we multiply 0.152 * 142 = 21.584g