Chemistry

1If 80 cm³ of hydrogen is produced in 20 s, the average rate is ___ cm³/s.

2On a graph of volume of gas against time, the reaction is fastest where

3If 30 cm³ of hydrogen is produced in 25 s, the average rate is ___ cm³/s.

4All collisions between reactant particles lead to a reaction.

5In the reaction of sodium thiosulphate with acid, the rate is followed by timing how long it takes for

6Increasing the temperature increases the rate mainly because

7The reaction rate decreases with time because

840 cm³ of gas was collected in 40 s. Find the average rate of reaction.

9Raising the temperature by 10 °C roughly doubles the rate of many reactions.

10The mass of a solid reactant fell from 2.4 g to 1.2 g in 20 s. Find the average rate of loss of reactant.