A 85 mg sample of Red 40 dye was dissolved and diluted to a final volume of 0.75 L with deionized water. What is the concentration of this solution in ppm

The concentration of this solution is 133.33 ppm

Explanation:

The Parts per million (ppm) is a unit of measure of concentration that refers to the amount of units of substance that exist for every million units in the set.

It is a unit used to measure the presence of elements in small quantities, that is, traces.

In the case of water, or any solvent of density equal to 1 kg / L as in this case, ppm also indicates the mg (milligrams) in a kg (and since the density is 1 kg / L, one kg matches one liter) of dissolution.

Then the concentration in ppm (mass / volume) would be:

The concentration of this solution is 133.33 ppm

answer; ///i do believe that the correct answer is (b); ///particle composed of two or more atoms bonded together;

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.