Chemistry

posted by .

How many atoms of carbon are present in
31.4 g of a compound that is 16.2% carbon, by weight?
Answer in units of atoms.

  • Chemistry -

    The mass is 31.4 g and it is 16.2%C; therefore, g C = 31.4*0.162 = ??
    moles C = ??g/molar mass C = xx moles C..
    1 mole of C atoms contains 6.022E23 atoms and you have xx moles C. _____ = # C atoms.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular …
  2. Chemistry

    For each definition, find a corresponding term from the following list: alkane,alkene, alkyne, alcohol, ether, aldehyde, ketone, carboxylic acid, ester, amine, fuctional group, isomers. a. Organic compounds with identical molecular …
  3. Chemistry

    This is the first in a series of hw pages. If anyone would be able to help me with this one I think I would be able to complete the other 20 hw questions I have. Thanks to anyone that helps. For each definition, find a corresponding …
  4. Chemistry 1

    I have trouble understanding ratios and relativity so I can't understand how to use atomic mass units. Here is an example from my book: How many grams of iron would contain the same number of iron atoms as the number of carbon atoms …
  5. Chemistry

    1. Calculate the number of moles of carbon atoms present in 2.4g of ethanol (C2H6O). 2. What is the % Nitrogen by weight in 3.696 mol of ammonium sulfide. 3. How many atoms of mercury are present in 5.4 cubic cm of liquid mercury?
  6. chemistry

    calculate the weight of carbon momoxide having same number of O2 atoms as are present in 22g of carbon dioxide
  7. chemistry

    An unknown organic compound that contains carbon,hydrogen and oxygen undergoes a combustion analysis. What happen to the carbon atoms and hydrogen atoms in the compound,assuming that the combustion goes to completion?
  8. CHEMISTRY

    How many atoms of carbon are present in 12.9 g of a compound that is 36 .7% carbon, by weight?
  9. Chemistry

    How many atoms of carbon are present in 49 g of a compound that is 54 . 1% carbon, by weight?
  10. chemistry

    How many atoms of carbon are needed to produce 0.45 mol Al?

More Similar Questions