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Rate Law

Q. how do they know that the units for Kequilibrium are M^-1 and how do they know the units for k1? Test is tomorrow so would appreciate speedy response. Thanks!

Solved • Dec 11, 2019

Ionic Salts

Q. How to determine the acidity and basicity of ionic salts. What are the ranges of Ka/Kb values for a negligible ion of salt, strong and weak?

Solved • Dec 11, 2019

Intermolecular Forces and Physical Properties

Q. Which of the following best explains the fact that H2S boils at -60 Celsius while H2O boils at 100 Celsius at normal atmospheric pressure? Both H2O and H2S exhibit London dispersion forces, but the dispersion forces are stronger in H2O H2O has a larger net dipole moment than H2S. H2O exhibits hydrogen bonding interactions while H2S does not. H2O has London dispersion forces while H2S does not. H2O has a smaller mass than H2S

Solved • Dec 11, 2019

First Order Half Life

Q. A certain substance follows a first-order decomposition. It is found that 50% of the original substance decomposed after 8.75 hours. (a) How much additional time will it take for 99.9% of the initial substance to have decomposed? (b) How much time is required for the extent of the decomposition to go from 99.9% to 99.99%?

Solved • Dec 11, 2019

Radioactive Decay

Q. Please give 5 example on each: Gamma Emission, Positron Emission, Electron Capture, Spontaneous Fission

Solved • Dec 11, 2019

Nuclear Fission

Q. When the U-235 nucleus is struck with a neutron, the Ce-144 and Sr-90 nuclei are produced along with some neutrons and electrons. How many electrons are emitted?

Solved • Dec 11, 2019

First Order Half Life

Q. The Cs-131 nuclide has a half-life of 30 years. After 107 years, about 3.0 grams remain. The original mass of the Cs-131 sample is closest to

Solved • Dec 11, 2019

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