Calculate mean rates of reaction from data

Question 1

Magnesium reacted with acid and 25 cm³ of hydrogen was collected in 10 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 2

Volume of gas collected: 0 s: 0 cm³; 20 s: 25 cm³; 40 s: 35 cm³; 60 s: 38 cm³; 80 s: 39 cm³; 100 s: 40 cm³. What was the mean rate between 0 s and 40 s, in cm³/s? Give 2 decimal places.

Answer cm³/s

Question 3

Marble chips and acid were placed on a balance. The mass fell from 150 g to 147.6 g in 300 s as carbon dioxide escaped. What was the mean rate of reaction, in g/s? Give 3 decimal places.

Answer g/s

Question 4

Magnesium reacted with acid and 240 cm³ of hydrogen was collected in 60 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 5

Volume of gas collected: 0 s: 0 cm³; 20 s: 28 cm³; 40 s: 40 cm³; 60 s: 45 cm³; 80 s: 48 cm³; 100 s: 49 cm³. What was the mean rate between 60 s and 80 s, in cm³/s? Give 2 decimal places.

Answer cm³/s

Question 6

Marble chips and acid were placed on a balance. The mass fell from 150 g to 147.6 g in 150 s as carbon dioxide escaped. What was the mean rate of reaction, in g/s? Give 3 decimal places.

Answer g/s

Question 7

Magnesium reacted with acid and 20 cm³ of hydrogen was collected in 40 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 8

Volume of gas collected: 0 s: 0 cm³; 20 s: 23 cm³; 40 s: 35 cm³; 60 s: 42 cm³; 80 s: 45 cm³; 100 s: 48 cm³. What was the mean rate between 20 s and 60 s, in cm³/s? Give 2 decimal places.

Answer cm³/s

Question 9

Marble chips and acid were placed on a balance. The mass fell from 150 g to 148.5 g in 120 s as carbon dioxide escaped. What was the mean rate of reaction, in g/s? Give 3 decimal places.

Answer g/s

Question 10

Magnesium reacted with acid and 40 cm³ of hydrogen was collected in 20 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 11

Volume of gas collected: 0 s: 0 cm³; 20 s: 22 cm³; 40 s: 32 cm³; 60 s: 36 cm³; 80 s: 38 cm³; 100 s: 39 cm³. What was the mean rate between 20 s and 40 s, in cm³/s? Give 2 decimal places.

Answer cm³/s

Question 12

Marble chips and acid were placed on a balance. The mass fell from 180 g to 179.1 g in 120 s as carbon dioxide escaped. What was the mean rate of reaction, in g/s? Give 3 decimal places.

Answer g/s

Question 13

Magnesium reacted with acid and 120 cm³ of hydrogen was collected in 40 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s

Question 14

Volume of gas collected: 0 s: 0 cm³; 20 s: 36 cm³; 40 s: 56 cm³; 60 s: 67 cm³; 80 s: 73 cm³; 100 s: 76 cm³. What was the mean rate between 20 s and 40 s, in cm³/s? Give 2 decimal places.

Answer cm³/s

Question 15

Marble chips and acid were placed on a balance. The mass fell from 120 g to 119.1 g in 120 s as carbon dioxide escaped. What was the mean rate of reaction, in g/s? Give 3 decimal places.

Answer g/s

Question 16

Magnesium reacted with acid and 5 cm³ of hydrogen was collected in 10 s. What was the mean rate of reaction, in cm³/s?

Answer cm³/s