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?

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


Question 2. Which is the highest rate of reaction?

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


Question 3. 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?

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


Question 4. Why is a high rate of reaction usually more desirable to industrial chemists?

Producing more product in a given time is usually purer.
Producing more product in a given time is usually easier.
Producing more product in a given time is usually cheaper.
Producing more product in a given time is usually safer.


Question 5. When calculating the rate of change in chemistry, which variable will you usually be dividing by?

Concentration.
Volume.
Time.
Mass.


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