Elements of Life: Amount of Substance

Question 1

Definition of empirical formula

Answer 1

Simplest whole number ratio of the different atoms in a compound

Question 2

How to calculate empirical formula ( 5 )

Answer 2

1. List all elements in compound
2. Write mass/ % of each element
3. Divide each element by Ar = moles
4. Divide each element by smallest no. of moles
5. Get ratio in simplest whole no. form ( by x or / )

Question 3

Definition of anhydrous compound

Answer 3

Has no water molecules inside it

Question 4

Definition of hydrated compound

Answer 4

Contain water molecules

Question 5

In a water of crystallisation calculation what does the x stand for

Answer 5

ratio moles of water