Chemical Reactions Unit Test

Question

2 of 142 of 14 Items
Question
How many atoms of carbon (C) are present in the reactants of the following chemical equation?

C7H16+O2→CO2+H2O


(1 point)
Responses

16 atoms
16 atoms

1 atom
1 atom

23 atoms
23 atoms

7 atoms
7 atoms

Answer 1

To determine how many atoms of carbon (C) are present in the reactants of the given chemical equation:

C7H16 + O2 → CO2 + H2O

We look only at the reactants, which are C7H16 and O2.

In C7H16, there are 7 carbon atoms. O2 does not contain any carbon atoms.

Therefore, the total number of carbon atoms in the reactants is 7.

So, the correct response is:

7 atoms