Science help?

Question

1: What type of reaction is this? AB B + A

Synthesis

Single Replacement

Decomposition

Double Replacement

2: AB + XY AY + BY

Single Replacement

Double Replacment

Decomposition

Synthesis

3: A + Z AZ

Synthesis

Single Replacement

Double Replacement

Decomposition

4: ABC AB + C

Decomposition

Synthesis

Single Replacement

Double Replacement

5: A + BZ AZ + B

Double Replacement

Synthesis

Decomposition

Single Replacement

6: Endothermic Reactions

release energy

absorb energy

neutralize energy

use no energy

7: Exothermic Reactions

release energy

absorb energy

neutralize energy

use no energy

9: What is a compound that accelerated a chemical reactions?

Exotherm

Catalyst

Quark

Substrate

10: In a chemical reaction matter and energy are

both created

both destroyed

both created and destroyed

neither created or destroyed

Answer 1

Repeat after me.... learning is fun. reading is fun

"the best work is play and the best play is work"