Asap
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.

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

b) nuclear ive learned that in a pedtrodic table