Question

N a reaction between Mg and Ar, which of the following is most likely to occur?

A. no reaction would occur
B. a precipitate would form
C. a gas would be produced
D. a color change would occur
E. an aqueous solution would form

Answer 1

In a reaction between magnesium (Mg) and argon (Ar), no reaction would occur due to argon's inertness. For the product of a chemical reaction where 5 g of magnesium chloride is formed, the true statement is that 0.08 moles of magnesium chloride are created, as it is the only option that closely approximates the calculated molar amount.

Step-by-step explanation:

In a reaction between Mg (magnesium) and Ar (argon), the most likely outcome is (A) no reaction would occur. Magnesium is a reactive metal, but argon is a noble gas with a full valence electron shell, making it chemically inert under normal conditions. Therefore, Mg and Ar would not typically react to form a precipitate, gas, color change, or aqueous solution.

Selecting the true statement regarding the product of a chemical reaction in which 5 g of magnesium chloride is formed, the correct answer is (a) 0.08 moles of magnesium chloride are formed in the reaction. The molar mass of MgCl2 is approximately 95.21 g/mol, so 5 g of MgCl2 would be 5 g / 95.21 g/mol = 0.0525 mol, which is closest to the 0.08 mol option provided. Options b, c, and d are incorrect; b because the number of Cl atoms would be twice the number of moles of MgCl2 multiplied by Avogadro's number, and c and d because they do not accurately reflect the chemical properties of MgCl2.