Explain the following experiments – add drawings, equations whenever applicable and include all explanation needed. Identify the following metals. A small piece of two metals, respectively, is dropped into water:

Does the temperature affect the solubility of sugar and salt in water? if it does tell me like different temperatures with different solubilities so i can sketch down a graph

What is the percent by mass of magnesium sulfate in mgso4.7h2o

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ