Calculate the molarity of 0.500 mol of Na2S in 1.05 L of solution. molarity: Enter numeric value Calculate the molarity of 34.7 g of MgS in 889 mL of solution. molarity: M M

39. At 20°C, a 0.376 M aqueous solution of ammonium chloride has a density of 1.0045 g/mL. Whatis the mass % of ammonium chloride in the solution? The formula weight of NH4Cl is 53.50g/mol.

A 250 mL solution of sodium hydroxide contains 3.5 moles of NaOH. What is it's molarity?

(Incorrect) In order to prepare very dilute solutions, a lab technician chooses to perform a series of dilutions instead of measuring a very small mass. A solution was prepared by dissolving 0.360 g of KNO3 in enough water to make 500. mL of solution. A 10.0 mL sample of this solution was transferred to a 500.0-mL volumetric flask and diluted to the mark with water. Then 10.0 mL of the diluted solution was transferred to a 250.0-ml flask and diluted to the mark with water. What is the final concentration of the KNO3 solution? 7.12 x 103 M (Your answer) 2.85 × 10-6 M 7.91 × 10-⁹ M 5.70 x 106 M (Correct answer) 1.42 × 10-4 M

b. Determine the number of moles of 0.01786 M acetic acid in 200 ml. (report 3 sig. fig.) liters x 1 moles liter 4. The demonstration used 1 g, 2g, 3g, 4g, and 5g of sodium bicarbonate, NaHCO3. a. Determine the molar mass of NaHCO3. Use 22.99, 1.01, 12.01, and 16.00 g mol-¹.

What is the w/w% if 331.5 g is dissolved in 1.00 L of water to give a density 1.18 g/mL

1. A 5 M solution of 100 mL of glucose contains how many grams of glucose, molecular mass = 180 g/mol?

15.0 mL of 17.2 M NaNO3 is diluted to 100.0 mL.  What is the molarity of the new solution? __________ M (Report your answer with the correct sig figs in units of moles/ L, M