Question

7 describe what is going on with the molecules during the different phases of water
water vapor\tice\twater

1.2 solubility in water

1. describe how salt dissolves in water chemically

4 what would be the ppt of a solution that has 30g of salt in 500ml of water?
5 what is the difference in sea surface salinities?
tropical\tpolar

1. what is the difference in solubility of gases in seawater?

carbon dioxide\toxygen

1. what changes the solubility of gases in water?

decreases\tincreases

1. describe how dissolved oxygen is used in the ocean.

Explanation:

Step1: Define parts - per - trillion (ppt)

Parts - per - trillion is a measure of concentration. 1 ppt = 1 mg/L. First, convert the mass of salt to mg and volume of water to L.

Step2: Convert mass of salt to mg

Given mass of salt is 30 g. Since 1 g = 1000 mg, then 30 g = 30×1000 = 30000 mg.

Step3: Convert volume of water to L

Given volume of water is 500 ml. Since 1 L = 1000 ml, then 500 ml=\frac{500}{1000}=0.5 L.

Step4: Calculate ppt

Concentration (ppt)=\frac{\text{mass of solute (mg)}}{\text{volume of solution (L)}}. Substitute the values: \frac{30000}{0.5}=60000 ppt.

Answer:

60000 ppt