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A 25.0-mL sample of 0.35 M HCOOH is titrated with 0.20 M KOH. What is the pH of the solution after 25.0 mL of KOH has been added to the acid? Ka = 1.77 × 10-4
Iranian President Mahmoud Ahmadinejad has a mass of 130 lbs. If Iran abandoned it's nuclear energy program and instead converted its President entirely to energy
The mixture is 20% benzene by volume. A densitometer gives the density of the mixed stream to be 1.1 g/mL. What are the mass fractions of all three species?
How will the following changes alter the concentration of CO2(g) in the following reaction exothermic reaction? C6H12O6(s) + 6O2(g) 6CO2(g) + 6H2O(g)
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is doubled and that of Br- is doubled? Just put in the number as a whole number or fraction.
nitrogen and hydrogen form the compound NH3 how many hooks would dalton put on the nitrogen atom to explain this compound?
In the haloform reaction, once the first alpha-hydrogen atom is replaced by a halogen atom, each successive hydrogen is more easily substituted
The weight of the initial mixture is 5.020 g, and the weight of the resulting anydrous compounds is 2.988 g. Which choice is closest to the percent by mass of copper(II) sulfate pentahydrate in the original mixture? Steps?
how to Devise a separation scheme for a mixture (C6H12O6) crystals, diamond powder (C) and BaCO3
when it dissolves in water (3 moles of ions/mole of salt). Calculate the freezing point of a solution containing 18.8g of Na2SO4 in 465g of water. The Kf for water is 1.86C kg mol-1.
How many grams of oxygen are collected in a reaction where 265 mL of oxygen gas is collected over water at a temperature of 298 K and a total pressure of 709 torr
4.60 mol of solid A wasplaces in a sealed 1.00 L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.10M where it remained constant.
what is the depth below the surface at which the concentration is 1016 atoms/cm3 if the surface concentration is maintained at 1018 atoms/cm3? Use D = 2 x 10-12 cm2/s for aluminum diffusing in silicon at 1100?C.
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