Question 1.
State Gay Lussac's Law of Combining Volume

Answer 1:
Gay Lussac's Law of Combining Volume states that when gases react, they do so in volumes which are simple ratio to one another and to the volumes of the products, if gaseous, provided that the temperature and the pressure remain constant.

Question 2.
At 17 degree Celsius, a sample of hydrogen gas occupies 125cm3. What will the volume be at 100 degree Celsius, if the pressure remains constant?

Answer 2.
See 1st attached image

Question 3.
A certain amount of gas occupies 5.0dm3 at 2atm and 10 degree Celsius. Calculate the number of moles present. (R= 0.082atmdm3/kmol)

Answer 3 : See 2nd image below.

Question 4.
State Collision Theory and mention four factors that affect rate of reaction

Answer 4 :
Collision Theory assumes that there must be collisions between reactant particles for a chemical reaction to occur.

Factors that affect rate of reaction include:
- Nature of Reactants
- Concentration/pressure (for gases) of reactants
- Surface area of reactants
- Presence of Light
- Presence of Catalyst