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Unit 4 Assessment
Chemical Reactions
Multiple Choice Questions: Choose the best answer for each of the
following questions.
1. 2 H2O2 () 4 Mno." (aq) + 3 CIO2- (aq) 4 MnO2 (s) + 3 CIO, - (aq) + 4 OH
- (aq)
According to the balanced equation above, how many moles of CIO, - (aq)
are needed
to react completely with 20. mL of 0.20 M KMnO, solution?
(A) 0.0030 mol
(B) 0.0053 mol
(C) 0.0075 mol
(D) 0.0040 mol
2.
2 KCIO, (s) 2 KCI (s) + 3 02 (g)
According to the equation above, how many moles of potassium chlorate,
KCIO, must be decomposed to generate 1.0 L of Oz gas at standard
temperature and pressure.

Sagot :

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