4. What is the molar concentration of a solution that results from diluting 25.0 mL of...
What is the concentration of a KOH solution prepared by diluting 25.0 mL of a 6.0 M stock solution to a dinal volume of 1.00 L?
1. A system does 425 kJ of work and loses 125 kJ of heat to the surroundings. What is the change in internal enery of the system? a) 550 kJ c) -300 kJ e) OkJ b) 300 kJ d) - 550 kJ 2. How many grams of NaBr (102.89 g/mol) are contained in 250.0 mL of a 0.200 M solution of sodium bromide a) 50.0 g c) 5.14 g c) 0.0500 g b) 20.6 g d) 0.486 g 3. A...
12. What is the concentration of the solution that results from diluting 75.0 mL of a 1.05 - solution of CH3OH to 500.0 mL? M. 1 13. How many grams of Ca(OH)2 are required to react with 2.36 mol of H3PO4 to prod Ca3(PO4)2 according to the equation ? 3Ca(OH)2 + 2H3PO4 +Ca3(PO4)2 + 6H2O
What is the concentration of a solution prepared by diluting 25.0 mL of a 4.50 M H2SO4 solution to a final volume of 1.00 L?
What is the concentration of a solution formed by diluting 25.0 mL of a 3.2 M Naci solution with 59 mL of water? O 27 M NaCI O 0.50 M NaCl O 10 M NaCI O 0.59 M NaCl O 1.18 M NaCl
32. What substances are present in an aquesous solution that results from mixing 25.0 ml of 0.20 M HCN with 20.0 mL of 0.25 M KOH? A) HCN, KOH and water B) HCN, KCN and water C) KCN, KOH, and water D) KCN and water 33. Calculate the pH of the solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 M HCN (K. = 4.9 x 10-10) solution. A) 5.15 B) 8.71...
Determine the concentration of a solution prepared by diluting 25.0 mL of a stock 0.188 M Sr(NO3)2 solution to 150.0 mL. 1.13 M 0.0313 M 0.0199 M 0 0.0501 M 0.0887 M
A solution is prepared by dissolving aluminum chloride in water and diluting to 500.0 mL. If this solution contains 44 ppm aluminum ions, the concentration of chloride ions is ppm. A) 11 B) 22 C) 44 D) 88 E) 132 Red-blood cells comprise an outer semi-permeable membrane, and are subject to osmosis. If local solute concentration inside the cells is higher than that outside: A) no net solvent migration will occur B) solvent will migrate from inside the cell to...
What is the molar concentration of Cl– in a solution prepared by mixing 25.0 mL of 1462.5 ppm NaCl with 35.0 mL of 2600ppm BaCl2?
27) What is the concentration (molarity) of HCI in the final solution when 65 mL of a 9.0 M HCl solution is diluted with pure water to a total volume of 0.15 L? 28) How many milliliters of a 9.0 M H2SO4 solution are needed to make 0. 45 L of a 3.5 M solution? A) 0. 18 mL B) 1.2 mL C) 180 mL D) 1200 mL 29) A student prepared a stock solution by dissolving 15.0 g of...