Chemical reactions

Question 1

in a chemical reaction, atoms are ______

Answer 1

rearranged

Question 2

the total mass __________ before and after the chemical reaction

Answer 2

stays the same

Question 3

when atoms rearrange in a chemical reaction, they form new ________

Answer 3

substances

Question 4

in a neutralisation reaction, Hydrochloric acid forms _______ salts

Answer 4

chloride salts (e.g sodium chloride)

Question 5

in a neutralisation reaction, Sulfuric acid forms ______ salts

Answer 5

Sulfate salts (e.g copper sulfate)

Question 6

in a neutralisation reaction, Nitric acid forms ______ salts

Answer 6

Nitrate salts (e.g sodium nitrate)

Question 7

what do chemical reactions break and form?

Answer 7

break bonds and form new substances with new properties

Question 8

From gas to liquid is called what?

Answer 8

condensing

Question 9

from liquid to solid is called what?

Answer 9

freezing

Question 10

from solid to liquid is called what?

Answer 10

melting

Question 11

from solid straight to gas is called what?

Answer 11

sublimation

Question 12

from gas straight to solid is called what?

Answer 12

deposition

Question 13

what are 3 examples of a chemical change?

Answer 13

1. wood burning to ash
2. iron - rust
3. food digesting