Question

Identify the missing coefficient in the balanced equation and classify the type of reaction.

Al2(CO3)3 ⟶ Al2O3 + ___CO2

1; Combination
1; Decomposition
3; Combination
3; Decomposition

Answer 1

I think it is decomposition because it processes in which chemical species break up into simpler parts.

Answer 2

Step-by-step explanation:

Part A

Balancing means that the same number of elements on one side of the equation must be the same as the number of elements on the other side.

You need 3 carbons on the right side because right now there is only one. Try putting a 3 in front of the CO2 and see if the oxygens come into balance as well.

Al2(CO3)3 ⟶ Al2O3 + ___CO2

Al2(CO3)3 ⟶ Al2O3 + 3CO2

Balance check

Element Left Right

Al 2 2

Carbon(C) 3 3

Oxygen 9 3 + 6 = 9

And it is balanced.

Part B

It's a decomposition of some kind. Two smaller molecules are created from one larger one.