Question

For preparing 100 ml of 155 ppm solution of urea in water how much amount of water is used

Answer 1

Explanation:

The amount of water is 100 ml only

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Answer 2

Explanation:

ppm=155

volume of solution =100ml

ppm=volume of urea/ volume of solution ×10^6

155=volume of urea/100×10^6

volume of urea = 155/10^4

volume of urea = 0•0155ml