This depends on the concentration of this salt water.
As much or as little as you like.
If you evaporate 10 grams of salt in 50 ml of water, all of the salt will remain once the water has completely evaporated. Evaporation only removes the water, leaving behind the salt.
98 mL
To calculate the amount of salt needed to saturate 25 ml of water, we can use a proportion based on the solubility limit in 100 ml of water. Since 100 ml can dissolve 36 g of salt, 25 ml can dissolve 9 g of salt (25/100 * 36 = 9). Therefore, you would need to add 9 grams of salt to saturate the 25 ml of water.
Salt Water Density: 1.027 g/mL Fresh Water Density: 1 g/mL
There is no (zero) salt at all in pure water, that's why it is 'pure' (meaning 'nothing else')
Dissolve 15 g salt in 100 mL water.
It's not! Pure water has a density of 1.000 g/ml. Sea water has a density of 1.025 g/ml and saturated salt water has a density of roughly 1.2 g/ml.
Bounty paper towels holds 30 mL of water
1.2g/ml
Yes
30 ml = 6.08652409 US teaspoons (about 6).