Snapquiz - Rate of Reaction

Question 1. When calculating the rate of change in chemistry, which variable will you usually be dividing by?

Concentration.
Mass.
Volume.
Time.

Question 2. 120g of magnesium is added to a 0.5 molar solution of sulphuric acid. After 15 minutes it is still reacting and it has produced 60cm³ of hydrogen gas. What is its rate of reaction?

2g per cm³.
4cm³ per minute.
0.5cm³ per gram.
8g 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?

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

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

Question 5. Which is the highest rate of reaction?

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

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