Final answer:
To find the number of equivalents in 2.95 moles of Mg2, multiply the number of moles by the valence of the ion. Since Mg2 has a +2 charge, 2.95 moles of Mg2 equal 5.9 equivalents.
Step-by-step explanation:
The student's question revolves around the concept of equivalents, which is a measure used in chemistry to express the reactive capacity of a given amount of a substance. To determine how many equivalents there are in 2.95 moles of Mg2, we need to consider the charge of magnesium ions. In this case, magnesium has a charge of +2, which means each mole of magnesium ions can supply two equivalents. The formula to calculate the number of equivalents is the number of moles multiplied by the valence of the ion.
So, for 2.95 moles of Mg2+:
Equivalents of Mg²⁺ = number of moles of Mg²⁺ × valence of Mg²⁺
Equivalents of Mg2⁺ = 2.95 moles × 2 eq/mol
Equivalents of Mg2⁺ = 5.9 eq
Therefore, there are 5.9 equivalents in 2.95 moles of Mg2, which corresponds to answer choice b) 5.9 eq.