Five silver coins are added to 454.0 mL of water. The water level rises to a volume of 545.0 mL. What is the volume of the five silver coins? Express your answer with the correct number of significant figures.

A chemist must dilute 56.7 mL of 217. mM aqueous sodium thiosulfate (Na₂S₂O3) solution until the concentration falls to 69.0 mM. He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Round your answer to 3 significant digits.

A chemist must prepare  600.mL  of  180.mM  aqueous barium chlorate  BaClO32  working solution. He'll do this by pouring out some  0.188M  aqueous barium chlorate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the barium chlorate stock solution that the chemist should pour out. Round your answer to 3 significant digits.

In the lab you weigh 12.54 g of NaCl to make a stock solution of 5.12 M. To further dilute the solution to 100.0 mL of 0.125 M, how much of the stock solution do you need? Give your answer in mL. Use correct number of significant figures.

Water is added to 25.0 mL of a 0.716 M KNO3 solution until the volume of the solution is exactly 500.0 mL. What is the concentration of the final solution? Round your answer to 3 significant digits. M x10 X

A student pipetted 10 mL of a sample solution into a 250 mL volumetric flask and diluted it to the mark with distilled water. The student then, pipetted 10 mL of this new solution into a 50.00 mL volumetric flask and diluted it to the mark with water. What is the dilution factor of the final solution?   25X   100X   125X   5X   50X

In a similar experiment, a pair of students was asked to measure out 10.00 mL of water using a 25-mL buret. The data they collected is shown in the table below: Trial Student 1 Student 2 1 9.98 mL 9.97 mL 2 10.00 mL 9.99 mL 3 9.99 mL 10.01 mL Which of the following statements best describes the set of data collected by each student? Student 1 both accurate and precise Student 2 only accurate [ Choose] only accurate both accurate and precise only precise

A chemist makes 380.mL of magnesium fluoride MgF2 working solution by adding distilled water to 20.0mL of a 18.8μmolL stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

A chemist prepares a solution of sodium carbonate (Na, CO,) by measuring out 101. g of sodium carbonate into a 450. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium carbonate solution. Be sure your answer has the correct number of significant digits. I mol/L

A chemist must prepare 975.mL of 3.00M aqueous sodium nitrate  NaNO3 working solution. He'll do this by pouring out some 5.68M aqueous sodium nitrate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the sodium nitrate stock solution that the chemist should pour out. Round your answer to 3 significant digits.     mL