Conservation Of Mass

Question 1

What happens to mass in a chemical reaction

Answer 1

Always conserved

Never lost or gained

Question 2

How do you show that mass is conserved mathematically

Answer 2

Adding up the relative formula masses of the substances on each side of a balanced symbol equation

Question 3

What are the two possible explanations if there is a change in the mass

Answer 3

1. If the mass increases, it’s probably because one of the reactants is a gas found in the air (oxygen)
2. Is the mass decreases, it’s probably because one of the products is a gas

Question 4

What will happen if the reaction vessel isn’t sealed

Answer 4

The gas expands out because from the particle theory we know that gas will expand