The true statement about proportions in this context is that; "Proportions have cross products that are equal."
<h2>Proportions in stoichiometry</h2>
The term stoichiometry is umbrella term that encompasses all the calculatrions that are aimed at calculating the amount of substance using mass - volume relationships. Usually, stoichiometry makes use of proportions.
The true statement about proportions in this context is that; "Proportions have cross products that are equal."
Learn more about proportions: brainly.com/question/9743981
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Atomic number is the number of an Adams protons
Parts-per-million is a form of concentration that is confusing to some. It is often used for aqueous solutions at low concentrations because, as you state in your question, in dilute solutions the density of water has not been affected ie. is still 1.00 g/mL.
parts per million is defined as micrograms of solute per milliliter of solution. This doesn't inherently make sense since micrograms are on the millionths scale, but mL are on the thousandth scale, so it would seem to be millionth per thousandth--Not so! Since the 1.00 mL of water weighs 1.00 g, ug/mL converts, for dilute aqueous solutions, to ug/g, which now makes sense as parts per million. So, from the information given, the calculation is quite simple:
0.0036 g Cl * 10^6 ug/1 g = 3600 ug Cl
1.00 L * 1000 mL/1L = 1000 mL
Concentration of Cl- in solution in ppm:
3600 ug Cl- / 1000 mL = 3.6 ppm Cl-