Which of these solids is insoluble in water?
sand
sugar
common salt
d)
jello powder

Sand is insoluble in water.

Explanation:

We know that both salt and sugar are soluble. When we pour either of those substance into water, they completely dissolve to make the water clear. Same with jello powder. You cant make jello without water, and we all know that jello powder dissolves into the water to make colored water!!

hope this helps you, if you have any questions feel free to leave them in the comments :)

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying