20 A 56.0 mL portion of a 1.80 M solution is diluted to a total volume of 268 mL. A 134 mL portion of that solution is diluted by adding 105 mL of water. What is the final concentration? Assume the volumes are additive. concentration: M

A stock solution of NazS2O3 is prepared by adding 20.40 grams of solid NazS2O3 to enough water to make 250.0 ml of solution. A 25.0 ml sample of that stock solution is 3) then diluted to a final volume of 500.0 ml. What is the concentration of sodium ions in the resulting solution (in mol/L)?

200.0 mL of a 0.750 M sodium hydroxide solution. How many moles of sodium hydroxide are in the solution?

A 54.0 mL aliquot of a 1.50 M solution is diluted to a total volume of 278 mL. A 139 mL portion of that solution is diluted by adding 107 mL of water. What is the final concentration? Assume the volumes are additive.

7. For a chemical analysis, 750 mL of a 0.480 mol/L potassium permanganate solution is to be prepared. Calculate the mass of potassium permanganate crystals that will be dissolved to make this solution. d) Baso

2 mL of 15.4 M stock solution of HCl is mixed with water to make a 100 mL solution.

Q 2 please

Show any formulas and set-ups used for calculations. Round answers to the correct number of significant digits and include correct units. 1.A glucose solution was made by dissolving 180.2 g of glucose in 35.86 kg of water. What is the mass percent of glucose in the solution? 2, a 325.2 g sample contains 42.3% NaCl. How many grams of NaCl are in the sample? 3. A 75.9 g mass of KOH was dissolved in enough water to make a total volume of 750.0 mL of solution. What is the molarity of this solution? 4. How many moles of NaHCO; should be dissolved in 300? mL of solution to make a 0.500 M solution?

The mass of iron(II) carbonate that is dissolved in 125 mL of a saturated solution is __________ grams.

How many mL of water should be added to 50.0 mL of a 15.0 M H2SO4 solution to give a final concentration of 0.300 M? A) 950 mL B) 1000 mL C) 2450 mL D) 2500 mL