Calculate the mass of CuSO4SH2O needed to dissolve in 650m3 of a 0.5 mol. dm3 of copper sulphate solution ​

If i make a solution by adding 83grams of sodium hydroxide to 750ml i’d water what is the molarity of sodium hydroxide

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.