help with stochiometry

posted by .

can someone help me out with this one? balanced equation is:
2H2 + O2 > 2H2O
My questions are:
How many molecules of water are produced from 2.0 * 10 ^23 molecules of oxygen?
How many moles of water are produced from 22.5 moles of oxygen?

OK. First, it depends on if you really mean molecules or if it is moles. I'm guessing you put molecules because that is what's on your sheet, so we'll go with that.

First you must convert molecules to moles of oxygen. I used "parts" instead of "molecules" just because the word is smaller.
(2*10^23 parts)(1 mol O2/6.022*10^23 parts)=0.332 moles O2
Now you can cross out the "parts" in the top and bottom. Then you need to compare moles of O2 to H2O:
(0.332 moles O2)(2 moles H2O/1 mol O2)=0.664 moles H2O
I got the moles of water over oxygen from the original balanced equation. Now, convert the moles of H20 to molecules of H20:
(0.664 moles H2O)(6.022*10^23 parts/1 mol H2O)=4*10^23 molecules of water.

For the next question, try it yourself and show your work on here and I'll let you know if you get it right.

IS THIS CORRECT:
22.5*1MOL O2/6.022*10^23 = .0037

.0037*2=.0074

Look at the equation.
1 mol O2 produces 2 mols H2O.
22.5 mols O2 will produce ????mols H2O?

22.5 ?

would I just multiply 22.5 * 16.00?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. moles to moles

    Two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water. How many molecules of water are produced from 2.0 * 10 23 power molecules of oxygen?
  2. 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 …
  3. science

    The chemical formula for glucose is C6H12O6. Six molecules of carbon dioxide (CO2) react with six molecules of water (H2O) to form six molecules of oxygen (O2). How many molecules of glucose will be produced?
  4. Chemistry

    Thank you for your help. I did want to clarify why you are only calculating the Molar Mass for H2 and not the molar mass for H2O (or even H2O2). I'm not sure why you did this. Please clarify. See below: The following reaction represents …
  5. CHEMISTRY

    The following reaction represents the decomposition of hydrogen peroxide: Balanced equation: 2H2O2 -> O2 + 2H2O How many moles of oxygen are produced from the decomposition of 3.4g of hydrogen peroxide?
  6. chemchemchem

    Using the equation 2H2 + O2 ==> 2H2O, determine how many grams of water is produced when 13 moles of oxygen is consumed.
  7. Chemistry

    For the theoretically perfect reaction 2H² +O²---2H²O if you react 300 molecules pf hydrogen and 200 molecules of oxygen, how many oxygen molecules will you have that do not engage in the reaction?
  8. chem

    Using the equation 2H2 + O2 ==> 2H2O, determine how many grams of water is produced when 29 moles of oxygen is consumed
  9. chem

    Using the equation 2H2 + O2 ==> 2H2O, determine how many grams of water is produced when 29 moles of oxygen is consumed
  10. Chemistry

    Two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water. How many molecules of water are produced from 2.0 x 1023molecules of oxygen?

More Similar Questions