A gas has a solubility in water of 11.9 g/L at 15°C and 505 kPa of pressure. What is the pressure of the gas, in atm., (at the same temperature) if the solubility of the gas is 20 mg/L? 734 grams of lithium sulfate are dissolved to make 2500.0 mL of solution. What is the Molarity of this Solution

Describe the process you would follow to prepare 120 ml of a 2.0 M solution of HCl if you started with a 6.0 M stock solution.

What is the percent (mass/volume) if 12 g of KCl is added to 50 mL of water to make 93 mL of solution?

If 75 g. of Potassium Chloride (ionic compound) is dissolved in 250 grams of water, what will be the freezing point of the solution? Kf = 1.86

The vapor pressure of pure water is 3.17 kPa. What will be the vapor pressure of a solution containing 13 g. of potassium permanganate (KMnO4) and 750 g of water?

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.