Chemistry

posted by .

I can't figure out how to set up this problem. Can anyone help me?

Question:

What volume of O2 (at STP) is used to react wiht 15.0 g of iron?

Answer: 4.52 L

Thanks :)

  • Chemistry -

    What is the product?
    Fe may react to form Fe2O3 or it might make FeO.
    My guess, expecially in the presence of pure O2, the product is Fe2O3. If it isn't you can tailor the answer to fit the product.

    1. Write the balanced equation.
    4Fe + 3O2 ==> 2Fe2O3

    2. Convert 15.0 g Fe to mols.
    mols = g/atomic mass.

    3. Convert mols Fe to mols oxygen by using the coefficients in the balanced equation.
    mols O2 = mols Fe x (3 mols O2/4 mols Fe) = xx

    4. Now convert mols O2 to volume knowing that 22.4 L is 1 mol at STP.
    volume O2 = mols O2 x 22.4 L/mol = ?? L.
    The answer I have if 4.52 but I didn't use exact numbers for atomic masses.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Suppose you use 135 calories of energy to perform a task, how many joules have you used?
  2. chem

    hi can anyone help how do i determine the molecular formular of the oxide of arsenic in its in its gaseous state the answer i got was 17.8 gl -1 for the density, which law do i use is it boyles law or charles law thanks A mol of a …
  3. Chemistry

    How many milliliters of NH3 (at STP) are needed to react with 45.0 mL of NO2 (at STP) according to the equation: 8NO2 (g) + 6NH3 )g) yield 7N2O (g) + 9 H2O. How to set this up?
  4. Chemistry - Equations

    I am a student in the ninth grade and I need help with the following problems because I do not understand how to do them. I appreciate your help and thanks once again. 7. in 2CO(grams) + O2(grams) => 2CO2(grams), what is the ratio …
  5. chemistry

    3.) One method used in the eighteen century to generate hydrogen was to pass steam through red-hot steel tubes. The following reaction takes place: 3Fe(s)+4H20(g)--->Fe3O4(s)+4H2(g) 1. What volume of hydrogen at STP can be produced …
  6. chemistry

    Really need help on figuring out the formula for Iron Complex. The question was: 4.0 g of ferrous ammonium sulphate, FeS04(NH4)2*SO4*6H20, is used. The oxalate is in excess, calculate the theoretical yield of the iron complex. I got …
  7. Chemistry

    Need help with this problem in order to figure out three others. What volume of 2.25 M HCI in liters is needed to Completely react with 0.500 L of 0.400 M Na2CO3?
  8. chemistry

    how many grams of iron are needed to react with 31.0L of chlorine gas at STP to produce iron(III) chloride?
  9. Chemistry

    Hi there - My labs and lectures aren't in synch at the moment so we are now doing a prelab that is asking for info I haven't been taught yet uggg... The prelab question I'm having trouble with is as follows: What is the volume at STP …
  10. Chemistry

    Hi everyone, I have been trying to figure out this titration equation all day and for some reason I am stumped. Here is the question in full: Potassium hydrogen phthalate, KHP, can be obtained in high purity and is used to determine …

More Similar Questions