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The addition of 6 g of salt to a sample of pure water causes its freezing point to be reduced from 0°C to -1.5°C. After an additional amount of salt is dissolved in the solution, its freezing point is -4.5°C. What is the total amount of salt dissolved in the sample of water?
When 4.03 g of CH3OH was mixed with 6.33 g of O2 and ignited, 3.92 g of CO2 was obtained. What was the percentage yield?
Sulfuric acid (H2SO4) is a very strong diprotic acid. If 0.066 moles of sulfuric acid is mixed with water to make 192 mililiter of solution, what is the molarity of H+?
an auto mechanic spills 83mL of 2.6M H2SO4. How many milliliters of 1.2M of NaHCO3 must be poured on the spill to react completely with the sulfuric acid?
What is the percent yield of a reaction in which 282 g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 114 g HCl?
how many Liters of water can be made from 34 grams of oxygen gas and 6 grams of hydrogen gas at STP? what is the limiting reactant for this reaction?
Calculate the molarity of 736 mL of a solution that contains 153 g of sucrose C12H22O11.
At 25 c the ion product of water, Kw is 1.9 x 10^-14. What is the concentration of hydroxide ions in a solution where the concentration of hydrogen is found to be 5.0 x 10^-15 mol dm^-3.
What is the pH of a solution that is 0.75 M in sodium acetate and 0.50M in acetic acid? (Ka for acetic acid is 1.85 x 10-5).
Determine the second order rate constant from the initial concentration and half life and what is the second order rate constant?
Determine the amount of heat energy is needed to raise the temperature of 0.362 kilograms of Cu from 23. Degree Celsius to 60 degree Celsius?
N2 + 3H2 -> 2NH3 . 28.0 grams of N2 and 5.04 grams of H2 are reacted, producing 17.8 grams of NH3. What is the percent yield?
What is the boiling point of a 0.800 molal solution of sugar in water? Kb = 0.512C/m for water. Sugar does not dissociate in solution and pure water boils at 100C.
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