(1.22 M)(10.00 mL) = MB(15.65 mL)
(1.22)(10)/ 15.65 = .78

A 150.-gram liquid sample of stearic acid, C17H35COOH, is cooled at a constant rate.
The temperature of the sample is recorded at 2-minute intervals in the data table below

Between time intervals 4 and 10 minutes, crystallization will occur.  The sudden change (lowering) of temperature represents the solution’s arrival at its freezing point.

If you heat and evaporate the water, you will be left with your NaNO3 product.

68 grams

By looking at the solubility curves (Table G), you can see that 88 grams of NaNO3 will be saturated in 100 grams of water at 20C.  In this case, you will need to add 68 grams to the already existing 28 grams.

3S + 2 KClO3 ------ 3SO2 + 2KCl + energy

(3) is the correct answer;  produces hydronium ions as the only positive ions in an aqueous solution. 
Arrhenius published two articles on acids and bases. The main ideas of his theories were: An Acid is any substance which delivers hydrogen ion (H+) to the solution.A Base is any substance which delivers hydroxide ion (OH¯) to the solution.Answer 4 refers to Arrhenious’ conclusion about a base.

H2O + KCl

HCl and KOH(a strong acid and strong base) react to form water and potassium chloride.

The pH range is between 7.6 and 8.2  You can find these values by looking at the end points between indicators phenolphthalein and bromthymol blue on Table M.

When the temperature increases, O2 is less soluble.

Oxygen fits between loosely bonded water molecules, so as the temperature of water increases and the molecules begin to move around more quickly, oxygen is less likely to stay in these places, or remain dissolved in water.

A DO concentration between 6 and 8 parts per million is considered healthy.

(2.7x10-2 g dissolved oxygen) /3800 grams of water (this factor must be multiplied by 106)

Your result is 7.1 ppm, which is  a healthy level, because it falls within the required range of oxygen.