C3.1.3 - Conservation of Mass Flashcards
1
Q
Can atoms be created or destroyed by chemical reactions?
A
No
2
Q
What is the law of conservation mass?
A
The total mass must remain the same during the reaction
3
Q
How can you investigate law of conservation of mass?
A
Carrying out a reaction in a closed system
4
Q
What is a closed system?
A
A container in which no substances can leave or enter during a reaction
5
Q
Give an example of a closed system.
A
A beaker carrying a substance that is not gas
6
Q
What is a non-enclosed reaction?
A
A reaction where substances can leave or enter the reaction
7
Q
Give an example of a non-enclosed reaction.
A
Creating a gas in a beaker with no lid
8
Q
Why might the mass seem to change in a reaction?
A
Some of the substances may have left or entered the reaction
