1.) activation energy is
a.) the heat is released in a reaction
b.) the energy barrier between reactants and products
c.) the energy given off when reactants collide
d.) generally very high for a reaction that takes place rapidly
2.) the rate of a chemical reaction normally
a.) decreases as temperature increases
b.) is slowed down by a catalyst
c.) increases as reactant concentration increases
d.) decreases as reactant concentration increases
does any have the rest of the answers of chemistry lesson 8 unit 3? (3-

1. B.) the energy barrier between reactants and products

2. C.) increases as reactant concentration increases

Explanation: Activation energy is defined as the extra energy required by the reactants to cross the energy barrier in order to get converted to products.

Activation energy is high for slow reactions and low for fast reactions.

Heat released in a reaction is called as the enthalpy change for a exothermic reaction.

2. Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

Rate of a reaction is increased by a catalyst as it decreases the activation energy and is usually increased by increase in temperature.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.