a substance that changes the rate of the reaction and is not consumed in the reaction 1 catalyst 2. a uniform mixture of molecul
es or ions of one substance in another solvent 3. the substance dissolved in a solution solute 4. the substance that does the dissolving in a solution 2 solution
A catalyst is defined as the substance that helps in decreasing the activation energy of a chemical reaction so that more number of reactant molecules can participate in the reaction.
During this process the catalyst doesn't get consumed in the chemical reaction.
As a result, a catalyst also helps in increasing the rate of a chemical reaction.
Thus, we can conclude that a substance that changes the rate of the reaction and is not consumed in the reaction is known as a catalyst.
The mass number is one mole and for Mg it is 24.306 for O it is 15.999 and for H it is 1.008. because O and H have 2, you multiply them by 2 and add all the numbers and it equals 58.32
