4.0 g of age to react with excess option if 9.0 g of H2O are produced from the reaction shown above what is the percent yield of H2O

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

Ineed to find the answer of this question because i dont understand it

Why do cells appear different in distilled water than they do in 10% salt water?