# What is the balanced equation for heptane (C7H16) burning in oxygen to make carbon dioxide and water?

The balanced equation is ##”C”_7″H”_16 + “11O”_2 → “7CO”_2 + “8H”_2″O##.

You follow a systematic procedure to balance the equation.

##”C”_7″H”_16 + “O”_2 → “CO”_2 + “H”_2″O”##

A method that often works is to balance everything other than ##”O”## and ##”H”## first, then balance ##”O”##, and finally balance ##”H”##.

Another useful procedure is to start with what looks like the most complicated formula.

The most complicated formula looks like ##”C”_7″H”_16##. We put a ##1## in front of it to remind ourselves that the coefficient is now fixed.

##color(red)(1)”C”_7″H”_16 + “O”_2 → “CO”_2 + “H”_2″O”##

Balance ##”C”##:

We have fixed 7 ##”C”## atoms on the left-hand side, so we need 7 ##”C”## atoms on the right-hand side. We put a ##7## in front of the ##”CO”_2##.

##color(red)(1)”C”_7″H”_16 + “O”_2 → color(blue)(7)”CO”_2 + “H”_2″O”##

Balance ##”O”##:

We can’t balance ##”O”## yet because we have two formulas that contain ##”O”## and lack coefficients. So we balance ##”H”## instead.

Balance ##”H”##:

We have fixed 16 ##”H”## atoms on the left-hand side, so we need 16 ##”H”## atoms on the right-hand side. We put an ##8## in front of the ##”H”_2″O”##.

##color(red)(1)”C”_7″H”_16 + “O”_2 → color(blue)(7)”CO”_2 + color(green)(8)”H”_2″O”##

Now we can balance ##”O”##:

We have fixed 22 ##”O”## atoms on the right-hand side: 14 from the ##”CO”_2## and 8 from the ##”H”_2″O”##. We put an ##11## in front of the ##”O”_2##.

##color(red)(1)”C”_7″H”_16 + color(teal)(11)”O”_2 → color(blue)(7)”CO”_2 + color(green)(8)”H”_2″O”##

Every formula now has a fixed coefficient. We should have a balanced equation.

Let’s check:

##color(white)(m)”Element”color(white)(m)”Left-hand side”color(white)(m)”Right-hand side”##
##color(white)(mmll)”C”color(white)(mmmmml)7color(white)(mmmmmmmmll)7##
##color(white)(mmll)”H”color(white)(mmmmll)16color(white)(mmmmmmmm)16##
##color(white)(mmll)”O”color(white)(mmmmll)22color(white)(mmmmmmmm)22##

All atoms balance. The balanced equation is

##”C”_7″H”_16 + 11″O”_2 → 7″CO”_2 + 8″H”_2″O”##

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.