You are analyzing a solid isolated from a reaction and find that its boiling point is over 1000 ∘c. you dissolve the compound in water solution and recrystallize it to produce some solid crystals that you use to determine that the compound is a crystalline solid. which of the following could be the identity of the unknown solid? check all that apply.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules