Question

An ordered list of chemical substances is shown.

Chemical Substances
1 Al
2 O2
3 H2O
4 SO2
5 Al2O3
6 CO2

Which substances in the list can be used to write a complete combustion reaction?
A.) 1, 2, and 3
B.)2, 3, and 6
C.)1, 4, and 5
D.)1, 2, and 5

HELP PLLLEASE!

Answer 1

Answer: d) 1, 2, and 5

Step-by-step explanation:

since 1 is Al and 2 is O2, they would combine to create Al2O3 (which would be 5). This is the only combination that contains the correct compounds of the answer choices.

Answer 2

Answer : The correct option is, (D) 1, 2, and 5

Explanation :

Combustion reaction : A chemical reaction in which a hydrocarbon reaction with the oxygen to give product as carbon dioxide and water.

or we can say that,

In combustion reaction, the metal react with oxygen to give metal oxide as a product.

From the given options we conclude that,
`Al,O_2\text{ and }Al_2O_3` chemical substances are used for writing a complete combustion reaction.

Thus, the complete combustion reaction will be:

`4Al+3O_2\rightarrow 2Al_2O_3`

Hence, the correct option is, (D) 1, 2, and 5