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In the reaction of sodium benzoate with hydrochloic ac to form benzoic acid, if 1.29 g of benzoic acid were formed, how many mmol of sodium benzoate would have been used?
How many moles of magnesium and moles of chlorine ions are present in 123.4 mL of a .345 M solution of magnesium chloride
Calculate the pH of a solution made by adding 69 g of sodium acetate, NaCH3COO, to 37 g of acetic acid, CH3COOH, and dissolving in water to make 200. mL of solution.
Determine the solubility of N2 in water exposed to air at 25 C if the atmospheric pressure is 1.2 atm. Assume that the mole fraction of nitrogen is 0.78 in air and the Henry's law constant for nitrogen in water at this temperature is 6.1 10-4 M/at..
What volume will a mixture of 0.65 mole H2 and 0.63 mole Kr occupy at 741 torr and 53.0 degrees celcuis
Calculate the volume of 1.94×10-3-M H2SO4 solution needed to provide 4.83×10-3 g of H2SO4.
What are the values of [H+], [H2PO3-], and [HPO32-] in a 3.0 M solution of H3PO3? What is the pH of the solution?
What mass of solid sodium formate (of MW 68.01) must be added to 110 mL of 0.55 mol/L formic acid (HCOOH) to make a bu?er solution having a pH of 3.84? Ka = 0.00018 for HCOOH
What is the total volume of gaseous products, measured at 332°C and 732 torr, when an automobile engine burns 100. g C8H18 (a typical component of gasoline)? Answer needs to be in Liters
Suppose a 24.3-mL sample of helium gas at 25 °C and 1.01 atm is heated to 50. °C and compressed to a volume of 15.2 mL. What will be the pressure of the sample?
25.0 mL of a calcium chloride solution is added to an excess of aqueous silver nitrate. The resulting precipitate has a mass of 1.25 grams. If the percent yield of this reaction is known to be 85%, calculate the concentration in molarity of the or..
The pressure on 200 ml of oxygen gas changes from 380 mm hg to 760 mm hg. The temperature does not change. What is the new volume of the oxygen gas?
A 14.0-g sample of CaCl2 is dissolved in 131 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C ..
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