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 solution containing 405.6 mM CaCl₂ is combined with an equal volume of 176.1 mM NaCl. What is the concentration of chloride (CI) ions in the resulting solution? Express your answer using units of millimolar (mM) using at least three significant figures.

Suppose 13.0g  of potassium sulfate is dissolved in  250.mL  of a  0.20 M  aqueous solution of sodium chromate.   Calculate the final molarity of sulfate anion in the solution. You can assume the volume of the solution doesn't change when the potassium sulfate is dissolved in it. Be sure your answer has the correct number of significant digits.

In the laboratory you dilute 2.56 mL of a concentrated 12.0 M hydrochloric acid solution to a total volume of 100 mL. What is the concentration of the dilute solution? M

A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. 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: 5.0 g She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 61.167 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 10.64 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. - 1 g•mL х10

Give the mass of the solute and mass of the solvent for 1.30 L of a solution that is 14.0 % of Pb(NO3)2 by mass (the density of the solution is 1.16 g/mL), starting with solid solute.       Express your answers using three significant figures. Enter your answers numerically separated by a comma.

Suppose 0.413 g of copper(II) nitrate is dissolved in 150. mL of a 17.0 m M aqueous solution of sodium chromate. Calculate the final molarity of copper(II) cation in the solution. You can assume the volume of the solution doesn't change when the copper(II) nitrate is dissolved in it. Be sure your answer has the correct number of significant digits. Шм M x10 × 18

Suppose 3.30 g of barium acetate is dissolved in 100. mL of a 0.50 M aqueous solution of ammonium sulfate. Calculate the final molarity of acetate anion in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it. Be sure your answer has the correct number of significant digits.

a. A 250.0-mL solution of sodium hydroxide was prepared by dissolving pure NaOH(s) in deionized water. It required 21.37 mL of 0.1127 M sulfuric acid to completely neutralize 39.29 mL of this sodium hydroxide solution. Calculate the mass, in units of g, of NaOH(s) that was dissolved to make the 250.0-mL solution. Enter your answer in decimal notation using 3 significant figures; i.e., enter 0.03478 as 0.0348   b. In an experiment, 23.24 mL of 0.235 mM silver nitrate are mixed with 9.12 Ml of 0.205 mM sodium phosphate. Assuming 100% yield, what is the concentration, in units of μM, of phosphate in the solution. Assume that the volume of the solid formed is negligible. Enter your answer in decimal notation using 3 significant figures; i.e. enter 2.579 as 2.58.