4.3 Information

Question 1

Chemical reaction properties

Answer 1

Happen at different rates
Some quickly rocket fuel
Some slowly rust

Accompanied by a change in energy
Some absorb food cooking
Some release heat light etc

Question 2

Conservation of mass scientists

Answer 2

Antione Lavoisier

Marie Anne paulze

Question 3

Consequences of the law of conservation of mass

Answer 3

During a chemical reaction no new atoms are made no new atoms are destroyed
Atoms are simply rearranged
During a chemical reaction some bonds are broken and new ones are made

Question 4

Airbags reaction

Answer 4

Have to sense collision
Very fast less than .05 seconds
Sodium azide NaN3 produces
Sodium and nitrogen gas which inflates