How many ml of a 4.1 meq/ml magnesium sulfate solution are needed to prepare 16 moles of magnesium sulfate in 100 ml of sterile water for injection?

it is impossible to prepare 16 moles of Moles of magnesium sulfate in 100ml from 4.1meq/ml because the concentration of final solution is higher than the initial one.

To prepare a solution from another solution, we should ensure that the the concentration of daughter solutions are lower than the mother solution (because we are going to do dilution) and we need to have enaugh volume to prepare it.

Or maybe there's a mistake in the question when you paste it.

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