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Problem- Iodine-131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of I-131 remains. What is the half life of I-131?
Express your answers in detail and I want you to explain the chemistry in this problem
Species that have the same number of electrons are described as isoelectronic. What +2 ion is isoelectronic with Rb+ What -ion
What part of the electromagnetic spectrum is known as the infrared region. Express your answer in terms of wavenumbers (cm-1). Please give answer in cm-1
Determine pH of a solution when 25.00 ml of 0.100 M HOAc is titrated with 0.100 M KOH. What is the pH at the equivalent point. (ka for HOAc = 1.80 x 10-5) HOAc + KOH ---- KOAc + H2O
An element crystallizes in a face-centered cubic lattice. The edge of the unit cell is 392 pm, and the density of the crystal is 21.45 g/cm3. Calculate the atomic weight of the element (in g/mol)
the solubility of o2g in water is 4.43 mg o2100 g h20 at 20 degree celsius when the gas pressure is maintained at 1
The log P value for nicotine is 1.09. If 20 mL of 0.10 g/mL nicotine solution in water is extracted with 20 mL of octanol, how much nicotine is removed from the water layer into the octanol layer?
Calculate the biological standard Gibbs energies of reactions of the following reactions and half-reactions
Problem- From its electronic configuration, predict which of the first 10 elements would be most similar in chemical behavior to the as yet undiscovered element 119.
how does a large electronegativity difference affect molecular properties?1. it makes the bonds stronger and shorter
Phenylacetic acid (C6H5CH2COOH) is one of the substances that accumulates in the blood of people with phenylketonuria, and inherited disorder that can cause mental retardation or even death
What is the solubility (in M) of PbCl2 in a 0.15 M solution of HCl. The Ksp of PbCl2 is 1.6 x 10^-5
Write a short article about how chromatography is used in every day life. I've been unsuccessful finding much information on exactly how and why it is used for any specific task
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