1.Which of the following compounds are insoluble in water?PbSO4 Be(OH)2 Mg(NO3)2

1.Which of the following compounds are insoluble in water?PbSO4 Be(OH)2 Mg(NO3)2 AlPO4 NH4I All are insoluble 2.What is the percent-by-mass %(m/m) concentration of Na2SO4 in a solution made by dissolving 15.8 g of Na2SO4 in enough water to give 87.1 g of total solution?3.How many grams of glucose (C6H12O6) are there in 257.15 mL of a 21.68 %(m/v) glucose-water solution?4.What is the molarity of a solution prepared by dissolving 15.07 g of HCl in enough water to make 920.72 mL of solution?5.How many milliliters of a 1.30 M KOH solution would be needed to provide 6.06 g of KOH to a chemical reaction?6.What is the osmolarity of a solution containing 0.3 M Ca(NO3)2 and 0.1 M Sucrose?7.What is the osmolarity of a solution containing 0.1 M NaNO3 and 0.2 M NaCl?8.What is the molarity of the solution prepared by diluting 49.5 mL of 2.09 M AgNO3 to the final volume 82.6 mL? Calculate your final answer to 2 decimal places.