Snapquiz - Rate of Reaction

This is the Snapquiz on Rate of Reaction. Click here or use the embedded video if you haven't watched the lesson yet.

Question 1. 270g of calcium carbonate is heated to 900°C for 30 minutes until it has completely thermally decomposed. What is the rate of reaction?

9g per minute.
0.11 minutes per gram.
0.3g per °C.
0.033 minutes per °C.

Question 2. When calculating the rate of change in chemistry, which variable could you be observing change?

Temperature of solution.
Amount of product formed.
Time taken.

Question 3. Which is the highest rate of reaction?

300g per hour.
0.1g per second.
7g per minute.
0.36kg per hour.

Question 4. A reaction between a 1.0 molar hydrochloric acid solution and some 15% pure copper carbonate ore takes 12 minutes to form 4.8g of copper chloride. What is its rate of reaction?

0.32g per percent.
0.4g per minute.
25% per minute.
0.067 moles per percent.

Question 5. 256g of zinc carbonate is added to a 0.1 molar solution of nitric acid. After 8 minutes it is still reacting and it has produced 12cm3 of carbon dioxide gas. What is its rate of reaction?

120cm3 per mole.
32g per minute.
1.5cm3 per minute.
21.33g per cm3.

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