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Posted by on Tuesday, February 12, 2013 at 2:24pm.

If 100 grams of KClO3 are heated to form KCl and O2 according to the equation
KClO3 ¨ KCl + O2 (Hint: You need to balance the equation)

a. How many moles of KClO3 reacted?
b. How many moles of KCl are formed?
c. How many grams of KCl are formed?
d. how many moles of O2 are formed?
e. How many grams of O2 are formed?

  • Chemistry Help! - , Tuesday, February 12, 2013 at 5:03pm

    2KClO3 ==> 2KCl + 3O2

    a. How many moles of KClO3 reacted?
    mols KClO3 = grams/molar mass.

    b. How many moles of KCl are formed?
    mols KCl = mols KClO3 x (2 mol KCl/2 mol KClO3) = mols KClO3 x 2/2 = ?

    c. How many grams of KCl are formed?
    grams KCl = mols KCl x molar mass KCl

    d. how many moles of O2 are formed?
    mols O2 = mols KClO3 x (3 mols O2/2 mols KClO3) = mols KClO3 x 3/2 = ?

    e. How many grams of O2 are formed?
    gO2 = mols O2 x molar mass O2.

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