Sterling silver contains 93.5% silver, if a necklace made of sterling weighs 15g. What is the mass of the silver dissolved contained in the necklace?

In a laboratory, a 15.0 mL sample of KCl solution is poured into an evaporating dish with a mass of 24.10 g. The combined mass of the evaporating dish and KCl solution is 41.50 g. After heating, the evaporating dish and dry KCl have a combined mass of 28.28 g.  a) what is the mass percent (m/m) of the KCl soultion?  b) what is the molarity (M) of the KCl soultion?  c) if water is added to 10.0 g of the inital KCl solution to give a final volume of 60.0 mL, what is the molarity of the diluted KCl soultion?

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: 6.0 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 94.86 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 122.28 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. 1 [1] 8.mL-¹ x10 X Ś

What is the mass of the solvent (in grams) in 1.000 L of an aqueous 1.500 M NaCl solution? Be careful with your significant figures! (Do not include the unit in your answer.) Type your numeric answer and submit