chemistry Emergency TEST

posted by .

1.How many moles of sodium oxide are produced when3.9 moles of sodium combine with excess oxygen.
2. Sodium chloride decomposes into elemental sodium and elemental chlorine.How many grams of chlorine will be produced if 39.4 grams of sodium chloride decomposes
3.If 6.7 moles of Mg react with 32 moles of O2.what is the limiting reactant
4.If 80 grams of sulfur dioxide reacts with 36 grams of carbon disulfide will be produced
5.If 84.8 grams of iron(III) oxide produced 57.8 grams of iron

  • chemistry Emergency TEST -

    All of these are stoichiometry problems and all follow the same rules. What is your major hang up? For example, explain in detail what you don't understand about #1 and how to go about solving it.

  • chemistry Emergency TEST -

    I was able to solve the frist one.Some of problems come when i am finding the limiting reactant and decompisition.

  • chemistry Emergency TEST -

    #2.The problem TELLS you the decomposition products; i.e.,
    2NaCl ==> 2Na + Cl2
    Now you have a problem just like #1.

    #3.
    2Mg + O2 ==> 2MgO
    Use the coefficients in the balanced equation to convert mol of EACH to mols MgO (the product)
    6.7 mols Mg x (2 mols MgO/2 mol Mg) = 6.7 x 2/2 = 6.7 mols MgO formed IF we used the Mg in the problem and all of the O2 we needed.
    32 mols O2 x (2 mols MgO)/1 mol O2) = 32 x 2/1 = 64 mols MgO IF we used 32 mols O2 and all of the Mg we needed.
    Of course BOTH of these answers can't be right; one must be wrong. In limiting reagent problems the correct answer is ALWAYS the smaller value and the reagent producing that value is the limiting reagent. Thus Mg is the limiting reagent because it produces the smaller number of mols of product.
    #4. This doesn't appear to be a complete question; however, if you complete the part that is omitted, then it is another limiting reagent problem but it strts with grams instead of mols. To convert to mols, mol = grams/molar mass and from there it's just like #3.
    #5.
    This is not a complete question.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Sodium Chloride is decomposed into the elements sodium and chlorine by means of electrical energy. How many grams of chlorine gas can be obtained from 2.5 moles of sodium chloride?
  2. Chemestry

    How many moles of sodium chloride are produced when 25 grams of sodium reacts with chlorine gas?
  3. chemisrty

    Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt). 2Na(s) + Cl2(g) 2NaCl(s) If 3.6 moles of chlorine react with sufficient sodium, how many grams of sodium chloride will be formed?
  4. chemistry

    If 9.20 g of sodium metal reacts with chlorine gas to make sodium chloride, how mnay grams of chlorine are required to react completely with the sodium?
  5. chemistry

    Sodium (Na) metal undergoes a chemical reaction with chlorine (Cl) gas to yield sodium Cl, or common table salt. If 1.00 g of sodium reacts with 1.54 g of chlorine, 2.54 g of sodium chloride is formed and 17.9 kJ of heat is released. …
  6. chemistry

    when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After …
  7. chemistry

    when chlorine gas is bubbled into a solution of sodium bromide, the sodium bromide reacts to give bromine a red brown liquid and sodium chlorine. A solution was made by dissolving 20.0g of sodium bromide in 100.0 g of water. After …
  8. Chemistry

    how many moles of sodium oxide are produced when 3.9 moles of of sodium combine with excess oxygen
  9. chemistry

    calculate the mass of sodium chloride produced when 5.50 moles of sodium reacts in excess chlorine gas.
  10. Chemistry

    Solutions of sodium hypochlorite, NaClO are sold as bleach. They are prepared by the following reaction: 2NaOH + Cl2 --> NaCl + NaClO + H2O If you have 2.32 mol of NaOH and 2.74 mol of Cl2 ga available to react, answer the following …

More Similar Questions