EXERCISE 1. Describe the effect of each of the following on the rate of the reaction of:
a) magnesium metal with a solution of hydrochloric acid
b) the molarity of the hydrochloric acid
C) the temperature of the solution
d) the size of the pieces of magnesium.
2. For each of the following situations, state whether the rate of the reaction
would increase or decrease, and explain your answer using the collision theory.
a) The concentration of a reactant is doubled.
b) The reaction is moved from a lab bench at room temperature into an ice
bath.
c) A solid crystalline reactant is broken down into smaller pieces with a
hammer.​

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.