How much water must be added to 40.0 g of CaCl2 to produce a solution that is 35.0 wt% CaCl2?

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

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?