Question

27.



What number should be substituted for the question mark to balance the equation and why is that the correct number?



C3H8 +?O2 → 3CO2 + 4H2O + heat



A.


The number 3 is needed to balance the equation. The right side of the equation shows 6 oxygen atoms, so the left side needs 3 O2.


B.


The number 5 is needed to balance the equation. The right side of the equation shows 10 oxygen atoms, so the left side needs 5 O2.


C.
The number 7 is needed to balance the equation. The right side shows 3 oxygen atoms in carbon dioxide and 4 oxygen atoms in

Answer 1

number 5 is needed

Answer 2

Crap I forgot to put D .
The number 4 is needed to balance the equation. The right side shows 4 oxygen atoms, so the left side needs 4 oxygen atoms.

Answer 3

C3H8 + 5O2 → 3CO2 + 4H2O + heat [That is 3C and 10O on the right]

Answer 4

Is 5 the correct one?

Answer 5

yup : you can see the above balance equation

Answer 6

Thank you!

Answer 7

np !!