Tuesday

October 21, 2014

October 21, 2014

Posted by **Brooke** on Wednesday, January 12, 2011 at 1:52am.

I have been working on this Q for four hours and it is driving me CRAZY please HELP i hate chemistry or anything with numbers in it as a matter of fact.

- Chemistry -
**Dr Russ**, Wednesday, January 12, 2011 at 3:39amC3H8 + 02 --> CO2 + H2O

There are two ways to balance an equation 1) by inspection 2) by maths. As you don't like numbers we will do it by inspection.

When balancing an equation look to see if there is an element on its own, in this case we have O as O2. So we can balance this last.

Start with the C atomss. There are three on the LHS so there must be three on the RHS.

C3H8 + 02 --> 3CO2 + H2O

similarly there are 8 H atoms on the LHS so we need 8 H atoms on the RHS. We can achieve this by putting a 4 in fron of the H2O. There are 8 H atoms in 4 molecules of water.

C3H8 + 02 --> 3CO2 + 4H2O

The last atom to balance are the O atoms. There are 6+4=10 O atoms on the RHS, so we need 10 O atoms on the LHS. There are 10 O atoms in 5 molecules of O2. So our balanced equation is:

C3H8 + 502 --> 3CO2 + 4H2O

**Answer this Question**

**Related Questions**

Chemistry Lab - Provide the correct coefficients to balance the following ...

calculus - Leave any unneeded answer spaces blank. [Hint: use synthetic division...

chemistry lab - Insert your values for x, y, z, & n into KxFey(C2O4)z·nH2O and ...

French - Hello, I am taking a French course online and i just want someone to ...

Science: Chemistry - Balance this chemical equation please! ___ CuSO4 + ___ Mg...

Spanish 2 Help! - Fill in the blamks with the appropriate pronoun and conjugated...

help - Introduction to quadratic equations? If you solve the equation by ...

Algebra 2 - Introduction to quadratic equations? If you solve the equation by ...

Chemistry - This is a balancing eqn Im finding rather tricky: ___Fe(NH4)2(SO4)2...

Economics - Normally, higher interest rates in a country cause the ___ for that ...