According to the collision theory, all collisions do not lead to reaction. which choice gives both reasons why not all collisions between reactant molecules lead to reaction? 1. the total energy of two colliding molecules is less than some minimum amount of energy. 2. molecules cannot react with each other unless a catalyst is present. 3. molecules that are improperly oriented during collision will not react. 4. solids cannot react with gases. a. 1 and 3 b. 3 and 4 c. 2 and 3 d. 1 and 2 e. 1 and 4

D.

Explanation:

reasons why not all collisions between reactant molecules lead to reaction

1.The total energy of two colliding molecules is less than some minimum amount of energy.

2. Molecules cannot react with each other unless a catalyst is present.

hence the correct option will be D that is 1 and 2.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge