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acetylene gas undergoes combustion to produce carbon dioxide and water vapor. if 75.0 L of co2 are produced how many liters of acetylene are required?
What is the pH of a solution that has a formic acid (HCHO2) concentration of 0.39 and a potassium formate (KCHO2) concentration of 0.12? The Ka for formic acid is 1.7 x 10-4.
the temperature of a 2.0 liter sample of heluim gas at STP is increased to 27 celsius and the pressure is decreased to 80.0 kPa. what is the new volume of the helium sample.
Calculate the ratio of CH 3 NH 2 to CH 3 NH 3 Cl required to create a buffer with pH = 10.14. Express your answer using two significant figures.
Define detection limit. Does a compound with high molar absorptivity have a higher or lower limit of detection than a compound with low molar absorptivity
a 12.6 g sample of NH4NO3 is dropped into a constant-pressure calorimeter containing 175 g of water at 23.5 C. What temperature will the water reach, assuming that the calorimeter container does not gain or lose any heat?
In a second 50.00mL aliquot, the ClO4- was reduced to Cl- with V2(SO4)3. Titration of the reduced sample required 40.12mL of the AgNO3 solution. Calculate the %KCl and %KClO4 in the sample
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
Consider the mechanism of reduction of WO3. At least two mechamisms are possible to the formation of HxWO3 during intercalation of WO3
Calculate the heat required to raise the temperature of 125 g of water are heated from 20.0oC to 100oC based on a specific heat of water of 4.184 J/g oC.
Calculate: A) mL of NaOH needed to reach the equivalence point B) pH of the solution before the addition of any NaOH C) pH of the solution after the addition of 15.0 mL of NaOH
Draw the structure of the carbocation intermediate leading to the formation of 3-methyl-1-butene. Use the (+) and (-) tools to adjust charges as necessary
What is the exact alkalinity of a water that contains 0.6580 mg/L of bicarbonate, as the ion, at a pH of 5.66? No carbonate is present.
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