We are being asked to determine the grams of glucose needed to prepare 400 mL of a 2.0%(m/v) glucose solution.

Recall the formula for %(m/v)

$\overline{){\mathbf{\%}}\mathbf{\left(}\raisebox{1ex}{$\mathbf{m}$}\!\left/ \!\raisebox{-1ex}{$\mathbf{v}$}\right.\mathbf{\right)}{\mathbf{}}{\mathbf{=}}{\mathbf{}}\frac{\mathbf{mass}\mathbf{}\mathbf{solute}\mathbf{}\mathbf{\left(}\mathbf{g}\mathbf{\right)}}{\mathbf{volume}\mathbf{}\mathbf{solution}\mathbf{}\mathbf{\left(}\mathbf{mL}\mathbf{\right)}}{\mathbf{\times}}{\mathbf{100}}}$

How many grams of glucose are needed to prepare 400 mL of a 2.0%(m/v) glucose solution?

A) 800. g B) 0.0050 g C) 8.0 8. D) 2.0 g E) 200.8

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