How many grams of glucose are needed to prepare 399 mL of a 2.0%(m/v) glucose solution

7.98 g of glucose are needed to prepare 399 mL of glucose solution

Explanation:

2.0 % m/v

This data represents, a sort of concentration for solutions.

It means that, our solution contains 2 g of solute, in this case glucose, which are contained by 100 mL of solution.

We only have to make a rule of three, in order to solve the question:

In 100 mL of glucose solution, we have 2 g of solute

In 399 mL of glucose solution, we may have:

(399 . 2) / 100 = 7.98 g

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a is the answer to this question

explanation: