A chemistry student weighs out 0.348 g of ascorbic acid (H,C,H,O,), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. I mL

Measurement and Matter Adding or subtracting and multiplying or dividing measurements 0/3 B A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: The label on the graduated cylinder says: empty weight: 1.500 g She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 40.22 g. She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 172.08 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. A Om g·mL -1 □×1 x10 x 5

A chemist makes 0.440 L of mercury(I) chloride (Hg,Cl,) working solution by adding distilled water to 0.0800 L of a 0.00000513 M stock solution of mercury(I) chloride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits. | M x10

A solution is made by mixing 5.40 g of toluene, CH8(1), with 954. mL of chloroform, CHCI3(1). Calculate the concentration of the solute in the solution using the units given below. (Density of = 0.867 g/mL. Density of chloroform = 1.49 g/mL. Assume volumes mix additively.) toluene Enter your answers in decimal form to 3 significant figures. Do not enter units since they are already provided. Molar: molal: m mole fraction: mass percent: %(m/m) percent volume: %(v/v)