# C4C5C6 Formulas Flashcards

1

Q

What is the formula for calculating the **percentage of metal in a mineral**?

A

Percentage of metal in mineral = **Total mass of metal atoms/Gram formula mass * 100%**.

2

Q

How do you **calculate the mass of a metal that can be extracted from a mineral**?

A

Work out the **mass of the metal in grams that can be extracted from 1 gram formula mass**.

3

Q

What is the **gram formula mass**?

A

The **relative formula mass in grams** *(e.g: H _{2}O is 18g)*.

4

Q

What is **percentage yield**?

A

**% yield = Actual yield/Theoretical yield * 100**.

5

Q

What is the formula for **percentage purity**?

A

% purity = **Actual mass of pure substance / Mass of impure substance * 100**.