객관식A stock solution of Pb(NO3)2 (315 mL, 2.5 M) contains how many Pb²⁺ ions and how many nitrate ions?553views
객관식How many grams of CaCl_2 are required to be dissolved in 0.700 kg of water to prepare a 1.25 m (molal) solution?99views
객관식A student dissolves 12.0 g of MgSO_4 in enough water to make 500.0 mL of solution. What is the molarity of the magnesium sulfate solution that was formed?100views
객관식What is the molarity of a solution prepared by dissolving 10.7 g of NaI in 0.250 L of solution? (Molar mass of NaI = 149.89 g/mol)99views
객관식What is the concentration of nitrate ions in 40.0 mL of a 0.25 M solution of copper(II) nitrate (Cu(NO_3)_2)?131views
객관식A student dilutes 25.0 mL of an HCl solution to a final volume of 250.0 mL. The concentration of the diluted solution is found to be 0.15 M. What was the original concentration of the HCl solution before dilution?142views
객관식How many moles of solute are present in 5.0 L of a 5.0 M potassium nitrate (KNO_3) solution?107views
객관식95 g of ClO_2 is dissolved in water to prepare a 0.25 M solution. What is the final volume of the solution in liters?111views