chemistry

posted by .

Find the formula for the compound that contains 72.4% iron and 27.6% oxygen.

  • chemistry -

    Take a 100 g sample which will give you
    72.4 g Fe and 27.6g O.

    Now convert g of each to moles. moles = grams/molar mass.

    Find the ratio of the elements tlo each other using small whole numbers with the lowest being 1.00. The easy way to do this is to divide the smaller number by itself which assures you of 1.00 for that element. Divide the other number by the same small number and round both to even numbers BUT don't round too much (not over 0.1 or so). For example, if you get Fe1O1.5, this is a ratio of 2:3. If you obtain numbers that can'tg be rounded, multiply by whole numbers until you get numbers that can be rounded for both. Post your work if need additional help.

  • chemistry -

    FeO4

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry help

    Determine the empirical formula for each substance. 1. A dead alkaline battery is found to contain a compund of Mn and O. Its analysis gives 69.6% Mn and 30.4% O. 2. A compound is 38.77% Cl and 61.23 %O. 3. Magnetic iron oxide is 72.4 …
  2. chemistry

    Fumaric acid, which occurs in many plants, contains, by mass, 41.4% carbon, 3.47% hydrogen, and 55.1% oxygen. A 0.050-mol sample of this compound weighs 5.80 g. The molecular formula of this compound is can you show me the formula
  3. Chemistry

    A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams …
  4. Chemistry

    A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams …
  5. chemistry

    Rust contains an iron-oxygen compound in which there are three oxygen atoms for each two iron atoms. In this compound, the iron to oxygen mass ratio is 2.325:1. Another compound of iron and oxygen contains these elements in the ratio …
  6. chemistry

    A certain compound contains only vanadium and oxygen. A 35.00 g sample of the compound contains 19.61 g of vanadium. Determine the empirical formula of this compound.
  7. chemistry

    a compound contains 5.2% by mass Nitrogen. It also contains carbon, hydrogen and oxygen. Combustion of 0.085g of the compound produced 0.224g of carbon dioxide and 0.0372g of water. Calculate the empirical formula of the compound.
  8. Chemistry

    A compound contains 69.9% iron and 30.1% oxygen. What is its empirical formula?
  9. science

    1.5173 g of organic iron compound containing FE , C ,H and O is burnt in oxygen gas produced 2.838 g OF carbon dioxide and 0.8122 g of water. In separate experiment to determine the mass % of iron, 0.3355 g of the compound yielded …
  10. CHEMISTRY

    A compound which contains hydrogen, oxygen, carbon only has molar mass of about 85 g/mol. When 0.43 g of the compound is burned in excess of oxyfen, 1.10 g of CO2 and 0.45 g of H2O are formed. Find the molecular formula and the empirical …

More Similar Questions