1000ppm = 1000mg per litre. this means 1g made up to a litre of solution.
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1 kg = 1000 grams so 7 dollars per kg = 7 dollars per 1000 grams. Dividing by 2: 3.5 dollars for 500 grams.
1 kg = 1000 grams 1 gram = 0.001 kg
There are 1000 grams per 1 kilo gram. The answer to this would be 2700 grams
4 900 000 milligrams in 4900 grams (1000 milligram per gram).
You haven't given the volume of solution. M means moles per liter. First off you divide 5 by 1000 and multiply by the amount of mls you have to find out how many moles that you have. then multiply by molecular weight of NaCl