Question

#1: What is usually released in a combustion reaction?

A. energy

B. elemental oxygen

C. a carbon-based fuel

D. elemental carbon

**my answer; A. energy

is that right?

Answer 1

#2: Hydrogen, when combined with nitrogen in a chemical reaction, forms ammonia. This is an example of which type of chemical reaction?

A. decomposition

B. synthesis

C. single-displacement

D. double-displacement

**my answer; B. synthesis

right?? or no??

Answer 2

yep! both right

Answer 3

#3: Which of the following best describes why MnSO4 MnO + SO3 is not a synthesis reaction?
A. Oxygen is not a reactant in this reaction.

B. The reaction has more than one product.

C. The equation is not balanced.

D. Energy is not a product in this reaction.

**my answer: B

is that right??

and yayy :D

Answer 4

oops!! i forgot to draw the arrow!! here it is :) lemme fix that...

here is #3: Which of the following best describes why MnSO4 ---> MnO + SO3 is NOT a synthesis reaction?

haha sorry!!

Answer 5

#4: If MnSO4 ---> MnO + SO3 is not a synthesis reaction, then what type of reaction is it?
A. decomposition

B. combustion

C. single-displacement

D. double-displacement
**my answer: A. decomposition

is that right?

Answer 6

#5: Which of the following statements about decomposition reactions is true?

A. Decomposition reactions are essentially the opposite of single-displacement reactions.

B. Decomposition and combustion reactions are the same thing.

C. Decomposition reactions are essentially the opposite of synthesis reactions.

D. Decomposition and single-displacement reactions are the same thing.

**my answer: C

is that right? :D

Answer 7

yep! alll right

Answer 8

great!! thx :D