Which of the following is an endothermic reaction? question 1 options: sodium chloride dissolving in water strong hydrochloric acid dissolving in water a liquid changing to a gas sugar dissolving in water

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest

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.)