Question: How many equivalents of Mg plus 2 are present in a solution that contains 2.75 mol 2?

Answer: 5.5 equivalents

Explanation:

First, determine the number of moles of Mg present in the solution. Since there are 2 moles of Mg for every 1 mole of , the number of moles of Mg is:

$$2 \text{ mol } \times 2.75 \text{ mol } = 5.5 \text{ mol Mg}$$

Next, calculate the number of equivalents of Mg plus 2 present in the solution. Since each Mg ion has a charge of +2, the number of equivalents is the same as the number of moles:

$$5.5 \text{ mol Mg} \times 2 = 11 \text{ equivalents}$$

Therefore, there are 11 equivalents of Mg plus 2 present in the solution.