The correct answer is A MODEL OF MOUNTAIN FORMATION.
A model refers to a representation of an idea, a process or a system, which is used to explain a specific phenomenon that can not be experienced directly. Models are often used in science to explain many phenomenon. When we are talking about a suitable model to represent an event that happens slowly, the most obvious choice from the options given above is mountain formation. This is because, the process of mountain formation occurs very slowly over a long period of time.
Mg(c) + 237shi (4z) ¥at h2)
The average atomic mass in amu of element X is 58.42 amu
The average atomic mass is the sum of the mass number of each of the isotopes multiplied by their respective abundances.
So;
The average atomic mass of element X is;
(58 * 0.68) + (60 * 0.26) + (0.06 * 62)
= 39.44 + 15.26 + 3.72
= 58.42 amu
The average atomic mass in amu of X is 58.42 amu.
Learn more: brainly.com/question/13292428
When HCl is added to a saturated solution of PbCl2, the solubility of PbCl2 would decrease so precipitation would occur. The decrease in the solubility is due to the common ion effect or the presence of Cl- ions in both compounds.
