Answer:
Explanation:
A catalyst is a <em>substance that increases the rate of a reaction by lowering the activation energy</em>. It does so by providing an alternative reaction pathway. The catalyst may react to form an intermediate with the reactant, but it is regenerated in a subsequent step so it is not consumed in the reaction. A catalyst speeds up a reaction by providing a set of elementary steps with more favorable kinetics than those that exist in its absence.
The average atomic mass of the element is 204.40 amu
<h3>Average atomic mass and isotopic mass</h3>
- The average atomic mass of an element is the average mass of the atom of that element calculated from the isotopic masses of the atoms of that element and their percentage abundances
- Isotopic mass is the mass of each isotope of that element
<h3>Calculation of average atomic mass</h3>
Average atomic mass = sum of isotopic mass * abundance of each isotope
Average atomic mass = 202.99 * 29.524% + 70.476% * 204.99 amu.
Average atomic mass = 204.40 amu
Therefore, the average atomic mass of the element is 204.40 amu
Learn more about average atomic mass and isotopic mass at: brainly.com/question/11096711