Chem

posted by .

How many oxygen atoms do you have in 2.00 grams of calcium phosphate?

Do you use avogadro's number and how?

How many Ca^2+ ions do you have in 2.00 grams of calcium phosphate?

Any help would be greatly appreciated.

  • Chem -

    The formula for calcium phoshpate is
    Ca3(PO4)2. First calculate the molar mass of that molecule. It is about 3x40 + 2x31 + 8x16 = 310 g/mol. You can get a more accurate value using more significant figures for ate atomic weights.
    2 grams of the compound is only 2/31 mole. Multiply that by Avogadro's number for the number of molecules. There are 3 Ca2+ ions per molecule and 8 O atoms per molecule.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    How many grams of calcium phosphate (precipitate) could be produced by combining 12.096g of calcium nitrate dissolved in water with 16.498g of rubidium phosphate dissolved in water?
  2. CHem

    How many oxygen atoms do you have in 2.00 grams of calcium phosphate?
  3. chemistry

    A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate …
  4. Chemistry

    If a solution of sodium phosphate, Na3PO4, is poured into seawater, precipitates of calcium phosphate and magnesium phosphate are formed. (Magnesium and calcium ions are among the principle ions found in seawater.) Write net ionic …
  5. science

    1. what weight in grams of magnesium oxide will produce from burning 96 grams of magnesium?
  6. Chemistry (stoichiometry)

    18.5 grams of calcium chloride reacts with 25.7 grams of sodium phosphate and produces calcium phosphate and sodium chloride. What is the limiting reactant?
  7. chemistry

    When calcium chloride and ammonium phosphate are mixed, an insoluble precipitate of calcium phosphate forms and falls out of solution. After careful analysis of the purified precipitate, 8.16 * 10^25 atoms of calcium are found in the …
  8. CHEM MOLES !@@!

    Mole Calculation Worksheet 1) How many moles are in 15 grams of lithium?
  9. chemistry

    a 36 grams sample of calcium hydroxide is allowed to react with 40.5 grams of phosphoric acid according to the following reaction. how many grams of calcium phosphate are produced?
  10. chemistry

    Stoichiometrics: a 36 grams sample of calcium hydroxide is allowed to react with 40.5 grams of phosphoric acid according to the following reaction. 3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 6H2O how many grams of calcium phosphate are produced?

More Similar Questions