C4C5C6 Formulas

Question 1

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

Answer 1

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

Question 2

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

Answer 2

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

Question 3

What is the gram formula mass?

Answer 3

The relative formula mass in grams (e.g: H₂O is 18g).

Question 4

What is percentage yield?

Answer 4

% yield = Actual yield/Theoretical yield * 100.

Question 5

What is the formula for percentage purity?

Answer 5

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