What is 0.075 percent expressed in ppm?
Answer and explanation
Correct answer: 750 ppm
The conversion factor between percentage and ppm is 1% = 10,000 ppm. Therefore, multiply the percentage value by 10,000: 0.075 × 10,000 = 750 ppm. The same result follows by writing 0.075% as 0.00075 of the whole and multiplying by 1,000,000. Options B and C are smaller by factors of ten and one hundred; D is ten times too large.
Frequently asked questions
What is the correct answer to this question?
750 ppm
Why is this the correct answer?
The conversion factor between percentage and ppm is 1% = 10,000 ppm. Therefore, multiply the percentage value by 10,000: 0.075 × 10,000 = 750 ppm. The same result follows by writing 0.075% as 0.00075 of the whole and multiplying by 1,000,000. Options B and C are smaller by factors of ten and one hundred; D is ten times too large.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Some Basic Concepts of Chemistry. Topic: Mole concept and molar mass.
