"0.35 g of hydrogen chloride (hcl is dissolved in water to make 3.0 l of solution. what is the ph of the resulting hydrochloric acid solution? "

Firstly calculating number of moles of hcl disssolved. The answer would be in the pic above. Concentration of hydrogen ions can be calculated by using that mole amount dividing by 3litres of solution to get 0.003196. Hence the ph of solution will be -log10(h+ concentration) which is equal to 2.495

Use photo math it helps a lot :) the answer is B by the way