Posted by mhaidar9108 on .
3.) One method used in the eighteen century to generate hydrogen was to pass steam through redhot steel tubes. The following reaction takes place:
3Fe(s)+4H20(g)>Fe3O4(s)+4H2(g)
2. What mass of iraon will react with 500.0 L of steam at 25 degrees C and 1.00 atm pressure?
3. If 285g of Fe3O4 are formed, what volume of hydrogen, measured at 20 degrees C and 1.06 atm, is produced?
I don't understand have to use which formula to plug in which numbers for number two in order to find the answers, or for number three.

Ap Chemistry Help 
mhaidar9108,
3. has questions 2 and 3 included, so its really not one question, its one question with three parts, but i have one part answered i just don't understand these two.

Ap Chemistry Help 
drbob222,
You need to be more specific. I worked problem 3.) for you yesterday and included all the steps, including answers to each step. #2 is worked essentially the say way as is #3. We try very hard to help but help is all we do. You posted three questions and I worked one. I shall be happy to help you work 2 and 3 but I won't do them for you. You may be confused about which numbers to plug into which formulas. Go back over the problem I worked for you. I shall be happy to help you understand the problem I worked. If you understand the steps in that problem then it should be easier to work 2 and 3.