Answer / abhishek chanchal

75mg of any substance->100ml of solvent
further 1ml from 100ml in 10 ml of solvent=75ppm

Answer / naresh

Parts per million is ppm. preparation is same above

Answer / sachin khade

(weight of solute/wt of solvent)x 10^6

1 mg dissolved in 1 liter = 1 ppm
75 mg dissolved in 1 liter = 75 ppm

Answer / lutfor shikder

ppm stands for parts per million.Mathematically it is mg/L. To make 75 ppm we have to 75 mg of the target substance into a 1 Lite volumetric flask and dissolve it with the diluent and finally make volume up to the mark.

ppb= mcg/L

Answer / ulhas patil

7.5 mg sample in to 100 ml volumetric flast.ppm is called
parts per million.

Answer / veena v nair

ppm is parts per million.when a solute present in very minute amounts or trace amounts,the concentration is expressed as parts per million.
ppm=(number of parts of the components or mass of the component A/total mass of the solution)*10000000

What is weak acid?

1 Answers  

Mention the formula to calculate ph of a solution?

1 Answers  

Why does a dog hang out his tongue, when it is hot ?

2 Answers  

it is possible that the air dissolves in any solvent?

1 Answers   BPCL Bharat Petroleum,

Which expands to the greatest, when heated : silids, liquids or gases ?

1 Answers  

Explain the process of spontaneous combustion?

1 Answers  

What materials are needed in making glass ?

3 Answers  

Why cooling is produced when a wet ?khus khus? screen is hung on the doors and windows ?

1 Answers  

Why is dew formed more readily on clear nights than on cloudy ones ?

1 Answers  

Of what substance are lead pencils made ?

2 Answers  

Explain the Boyle?s law ?

2 Answers  

When the heat rays from the sun area focused on a piece of black cloth by means of a lens, the cloth catches fire. Why ?

1 Answers