Question

I need a medication to be diluted to 3 mg per liter. I only have 1.5 mg of the medicine to

start with, so how much water should I add?
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Answer 1

Answer: 1.5mg of medicine is to be added to 500ml of water to gain a solution of 3mg per liter

Explanation:

3mg per liter is needed. That is 3mg of medicine in 1000ml of water.

As we have only 1.5 mg of medicine that is half of 3mg. We have to add a half of one liter of water. that is 500 ml of water.