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Molecular vs Electron Geometry

Q. Determine the shape of the central atoms of the following molecule: N2O3 ( ONNO2 )

Solved • Nov 19, 2019

Buffer

Q. (A) Solve the following buffer problem 1. using the -ICE table method Calculate the pH of a solution made by dissolving 5.15 g of hypochlorous acid, HOCl, (MM = 51.46 g/mol) and 15.09 g in sodium hyochlorite, NaOCl (MM = 75.46 g/mol) in 1.00 L of water solution. pKa = 7.52. b) How much will the pH change when 50.0 mL of 0.100 M of NaOH solution is added to 100.0 mL of buffer solution prepared in part A above?

Solved • Nov 19, 2019

Chemistry Gas Laws

Q. Under constant pressure a sample of hydrogen gas initially at 27.0 °C and 6.70 L is cooled until its final volume is 1.50 L. What is the final temperature?

Solved • Nov 19, 2019

Buffer

Q. Calculate the pH of a solution made by dissolving 5.15 g of hypochlorous acid, HOCl, (MM = 51.46 g/mol) and 15.09 g in sodium hyochlorite, NaOCl (MM = 75.46 g/mol) in 1.00 L of water solution. pKa = 7.52. SOLVE using the Henderson-Hasselbalch equation

Solved • Nov 19, 2019

Manometer

Q. A flask containing neon gas is connected to an open-ended mercury manometer. The open end is exposed to the atmosphere, where the barometric pressure is 745 torr. The mercury level in the open arm is 5.0 cm below that in the arm connected to the flask of neon. What is the neon pressure, in torr?

Solved • Nov 19, 2019

Rate Law

Q. Some measurements of the initial rate of a certain reaction are given the table below (see attaached image). Use this information to write a rate law for this reaction, and calculate the value of the rate constant k. Round your value for the rate constant to 3 significant digits. Also be sure your answer has the correct unit symbol.

Solved • Nov 19, 2019

Coordination Isomers

Q. The drawing below shows an example of a) optical isomerism b) cis-trans isomerism c) fac-mer isomerism d) different representations of the same species

Solved • Nov 19, 2019