4. Fill in missing information on Data sheet for Steps 3,6, and 7(30 points) Dat

Question

4. Fill in missing information on Data sheet for Steps 3,6, and 7(30 points) Data Section 13.7 g 1. Mass of empty test tube: 2. Mass of test tube + Potassium Chlorate: 15.7 g 3. Mass of Potassium chlorate 4. Mass of test tube and total contents including catalyst before heating: 17.7g 5. Mass of test tube and total contents including catalyst after heating 17.2 6. Mass of oxygen gas evolved: 7. % of oxygen from the chlorte sample: Note: Catalyst does not react in the reaction and the weight of the catalyst is 2.00 g. Hint: Part/ Whole

Explanation / Answer

Q3.

mass of potassium chlorate = 15.7-13.7 = 2.0 g

Q6

mass of oxygen = (17.7-17.2) = 0.5 g

Q7.

% Oxygen = mas of Oxygen / total mass*100 = 0.5/2*100 = 25%

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