Topic 3 Conservation of mass

Question 1

What is the conservation of mass

Answer 1

No atoms are destroyed and no atoms are created which means there are the same number and types of atoms on both sides of the equation
No mass is lost or gained

Question 2

When might you see a change in mass

Answer 2

when it is in an unsealed reaction vessel

Question 3

What does it mean if the mass has increased

Answer 3

Because one of the reactants is a gas found in the air
Before the reaction it is floating in the air and it’s mass can’t be accounted
After the redaction it forms the product and becomes contained in the reaction vessel so the mass increases

Question 4

What does it mean if the mass decreases

Answer 4

If the vessel isn’t enclosed and one of the products formed is a gas it can escape and therefore the mass decreases