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chemistry
september 2019
26

Chemistry Questions and Answers September 26, 2019

Expert-verified solutions to help you succeed

After an aqueous extraction, 15 mL of dilute aqueous hydrochloric acid solution (<10% by Volume) remains. Outline the steps for disposal of this solution.

A closed cylindrical tank, 3.05m high and 0.610 m diameter has a mercury Utube gauge connected to the side 0.717 m above the bottom of the tank, the other end of the Utube being open. When the tank is empty the level of mercury is 0.22 m below the bottom of the tank. A piezometer tube is connected to the bottom of the tank. Into the tank are

Calculate Ka for the cation and Kb for the anion in an aqueous NH 4 F solution. Express your answers using two significant figures separated by a comma.

A gas absorption tower contains two feed streams F1: a gas containing 33.0 mole% O2, 66% N2, and 1% SO2 at 250L/s at 35C, and 1.2 atm; and F2: liquid water flowing at a rate of 15.0 mol/s at 35C, and 1.2 atm. There are two product streams coming out this gas absorption tower P1: a liquid stream containing most of the entering water and a small

Compare the ground-state electron configurations of potassium and argon. Explain why it is easier to remove the outer electron of potassium than that of argon, even though potassium has more positive charge in its nucleus.

The half-life of U-238 is 4.5 x 10^9 years. How many disintegrations occur in 1 minute for a 10 mg sample of this element?

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