Snapquiz - Rate of Reaction

Question 1. Why is a high rate of reaction usually more desirable to industrial chemists?

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

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

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

Question 3. When calculating the rate of change in chemistry, which variable will you usually be dividing by?

Concentration.
Volume.
Time.
Mass.

Question 4. 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 5. 270g of calcium carbonate is heated to 900°C for 30 minutes until it has completely thermally decomposed. What is the rate of reaction?

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

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