# Chemistry Homework- Stoichiometry: Volume and Particle Calculations

1. Jan 10, 2009

### SpoChi

Chemistry Homework-- Stoichiometry: Volume and Particle Calculations

This is only to check my work, and I may be updating this post with more problems. There are ten questions total, and this is NOT graded. Therefore, the help I recieve goes toward my understanding, not my score.

1. The problem statement, all variables and given/known data
What VOLUME of oxygen is produced from the decomposition of 5.67 x 10^24 molecules of water?
Balanced equation:
2H2O >decomposes to> 2H2 + O2

2. Relevant equations
6.02 x 10^23 molecules : 22.4L @STP for any gas
Mol-Mol ratio = 1 mol O2/ 2 mol H2O

3. The attempt at a solution
Trying to go along with dimensional analysis format.
(5.67 x 10^24)/(6.02 x 10^23) x 1 mol O2/ 2 mol H2O x 22.4L = 105.488L

Is the mol-mol ratio necessary? Without it, the answer comes out to 210.977L (rounded).

2. Jan 10, 2009

### epenguin

Re: Chemistry Homework-- Stoichiometry: Volume and Particle Calculations