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A titration is performed by adding 0.400 M KOH to 40.0 mL of 0.300 M HCl. What is the pH after addition of 20.0 mL of the base?
A body consists of a right circular cone whose base is 12 in. and whose altitude is 16 in. A hole 8 in. in diameter and 4 in. deep has been drilled from the base. The axis of the hole coincides with the axis of the cone. Locate the centroid of the..
Calculate the molar mass of a nonelectrolyte that lowers the freezing point of 25.00 g of water to -3.9 degrees Celsius when 4.27 g of the substance is dissolved in the water.
The mass of a cube of iron is 338 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
The crossed aldol condensation of acetaldehyde with benzaldehyde is aided by the fact that benzaldehyde bears no α-protons. However, a possible competitive reaction is the “selfcondensation†of two molecules of acetaldehyde.
need to neutralize the NH2 and stanilize the polyamide. I just want to clarigy we we need to wash it in HCl after interfacial polymerization.
What volume in L is occupied by 19.62 g of methane, CH4 (MM = 16.04 g/mol) at 23 °C and 1.34 atm?
A pressure-measuring device indicates that the blood pressure of a normal person oscillates between 120mm Hg (at the peak of the heartbeat) and 80mm Hg (between heartbeats).
Write out two net ionic equations for the reaction of hydrochloric acid with carbonate to form bicarbonate and the reaction of hydrochloric acid
what is a given and how much water must be mixed with concentrated hydrochloric acid to prepare 50 cubic cm of 6 molar hydrochloric acid solution?
the meta and para forms of phenylene diamine are used in the production of Kevlar and Nomex, respectively. Why is a corresponding material with similar properties not made from ortho-phynelene diamine
Identify the element or elements that undergo
a mixture with 75% R and 25% S has an optical rotation of -30. what is the optical rotation of pure R?
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