Empirical And Molecular Formula

Question 1

What is the empirical formula

Answer 1

This is the simplest whole number ratio of atoms present in a compound

Question 2

What is the molecular formula

Answer 2

This is the actual number of atoms by each element present in a compound

Question 3

How is empirical formula calculated

Answer 3

To find empirical formula, first divide percentage or the amount by Mr of element then divide through out by lowest value
Amount/Mr=n(9)–>n(9)/n(3)
Amount/Mr=n(3)

Question 4

What happens if ratio is an exact 0.5 or 0.25

Answer 4

The ratio would be multiplied by appropriate integer to gain an integer

Question 5

How to calculate molecular formula

Answer 5

This can be done by dividing Mr of compound by empirical mass and then multiplying with empirical formula