Asolution contains 15 ppm of benzene. the density of the solution is 1.00 g/ml. this means that

the solution is 15% by mass of benzene
1.0 g of the solution contains 15 * 10^-6 g of benzene
there are 15 mg of benzene in 1.0 g of this solution
100 g of the solution contains 15 g of benzene
1.0 l of the solution contains 15 g of benzene

Explanation:

ppm is a unit of concentration that means parts per million. In grams that is grams of solute per one million (10⁶) grams of solution.

Then, 15 ppm of benzene means that there are 15 grams of benzen in 1,000,000 grams of solution.

That leads to:

Multiplying numerator and denominator by 10⁻⁶ you find:

Simplifying:

Which is read as 1.0 g of the solution contains 15 × 10⁻⁶ g of benzene, i.e. the second answer choice.

i believe the answer is c. "baking" is the gerund, while "baking blueberry muffins" would be the gerund phrase. hope this ! : )

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.