12. How many grams of salt are contained in 3 kg of seawater that has a salinity

Question

12. How many grams of salt are contained in 3 kg of seawater that has a salinity of 34 ‰? _________ g

13. According to the Gatorade website, “Water is not enough”. Apparently, you also need the 0.11 g of sodium and 0.03 g of potassium in every 240 g (8 oz) serving of Gatorade. This sodium and potassium together make up what fraction of the total weight of a serving of Gatorade, in parts per thousand (that is, what is the salinity of Gatorade)? ____________ ‰

14. Your blood also contains salts, mostly Na+ and Cl-. Generally speaking, mammals such as ourselves have about 9 g of salt per 1 kg (about 1 liter) of blood. So, what is the salinity of mammal blood in parts per thousand? ________________ ‰

Which substance takes more heat energy to raise its temperature 1°C: 25 g (~1 oz) of freshwater, or 25 g of pure copper with a heat capacity of 0.092 cal/g°C?)

Explanation / Answer

12) if the salinity of water is 34 ppt for a kg of water , then it is 3.4 % for 100 grams. which means 3.4 grams for evey 100 grams and 34 grams for every 1000 grams of sea water

so for 3000 grams it will be 3*34 = 102 grams of salt

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