chemistry

how many molecules are in 5.5 moles of oxygen gas? How many atoms are in this quantity of gas?

I used dimensional analysis and did:
5.5 mol. of oxygen x 6.02x10^23 molecules/1 mol of oxygen
I got 3.3x^24 molecules of oxygen
How do I find the # of atoms? I know that there are 2 atoms of oxygen in one molecule of oxygen gas, so do I divide my answer by 2 to get the # of atoms?

  1. 👍 0
  2. 👎 0
  3. 👁 107
asked by ally
  1. Right on all except what you do for atoms. You are right that each molecule oxygen contains two atoms of O so doesn't it stand to reason that O atoms will be twice O molecules.

    1. 👍 0
    2. 👎 0
    posted by DrBob222
  2. that makes sense, thank you!

    1. 👍 0
    2. 👎 0
    posted by ally

Respond to this Question

First Name

Your Response

Similar Questions

  1. chemistry

    Hi, how many moles does 0.225g of oxygen atoms represent? If 1 mole of oxygen atoms represents 16.0g? Thanks mols = grams/molar mass. thot so. Thanks for confirming ;) This is right for oxygen atoms, however, oxygen in the

    asked by bertie on February 5, 2007
  2. Physics

    How many grams of water (H_2O) have the same number of oxygen atoms as 1.0 (mol} of oxygen gas? atomic mass of H is 1 and O is 16, so H2O has a molar mass of 18. Oxygen gas is O2, with a molar mass of 32. So 1.0 mole of oxygen gas

    asked by ana on November 19, 2009
  3. chemistry

    how many moles of oxygen atoms does 1.2x10^25 diphosphorus pentoxide molecules have? hwo many oxygen atoms are in 1.25 mol sulphur trioxide? i don't understand these

    asked by lisa on December 5, 2008
  4. chem1 WORD PROBLEM!!

    6. how many grams are in 4 moles of Be (OH)3? 7.How many atoms are in 4 moles of C6H12O6? 8.how many moles are in 12.04x10 23 to the power molecules of hamburgers? 9. how many molecules are in grams of Helium gas (He2)?

    asked by tyneisha on December 6, 2012
  5. Chemistry

    A few questions...how many grams are in 48.7x10^24? I don't know how to convert atoms to grams. I can do moles to grams or moles to atoms, but not atoms to grams. My other problem is how do you convert moles to moles as in "how

    asked by Angeline on April 20, 2009
  6. 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? How many moles of water are produced from 22.5

    asked by iearn on January 24, 2007
  7. help with stochiometry

    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

    asked by iearn on January 24, 2007
  8. Chemisty

    Identify the limiting and excess reagent for each of the following scenarios involving the formation of silicone dioxide, SiO2. If you could just get geared in the right direction that would be wonderful. I am just a bit confused

    asked by Danielle on March 1, 2012
  9. Chemistry

    112.00g of nitrogen gas is reacted with an excess or abundant amount of oxygen gas. The single product, a gas, is determined to have a mass of 431.92 g. Additional experiments showed that the product consisted of 2.0 moles. a) how

    asked by Maria on December 2, 2015
  10. Chemistry

    Methane gas (carbon tetrahydride) reacts with oxygen by combustion: CH4 + 2O2 -> CO2 + 2H2O a.)How many moles of methane are needed to produce 3.5*10-4 moles of carbon dioxide? b.)How many moles of oxygen are needed to react form

    asked by Kelsi on November 4, 2013

More Similar Questions