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a sampling of 30 million particles coming from an exhaust vent contained 60 sulfur dioxide molecules. what is another way of expressing this concentration of sulfur dioxide using this information?

a.) 2 ppm

b.) 50%

c.) 2 ppb

d.) 12,000 g/l

Explanation:

60 particles in 30 million can be expressed as a fraction:

And, dividing both numerator and denominator by 30, that can be simplified as:

That means 2 particles of sulfur dioxide in 1 million particles of sample, which is 2 parts per million or 2 ppm, which is the option A.

the answer is c. nacl