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Question- 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?
Mention step wise computation of your work done
Scientists can use mutants to study metabolic pathways. These organisms have a mutation in a gene encoding a metabolic pathway enzyme that results in the inactivation of that enzyme
Write the schematic shorthand notation chemists use to represent electrochemical cells for a cell where the anode consists of solid copper immersed in a 0.0100-M solution of copper (II) nitrate and cathode consists of solid silver immersed
Explain why the Diels-Alder reaction of Anthracene and Maleic anhydride forms 9, 10-dihydroanthracene-9,10-a, ß-succinic anhydride.
Problem- Calculate the pH at the equivalence point for the titration of 0.160 M methylamine (CH3NH2) with 0.160 M HCl. The Kb of methylamine is 5.0Ã- 10â€"4.
0.5g KCl was dissolved in 100g water and the solution originally at 200C, froze at - 0.240C. Calculate the percentage ionization of salt. Kf per 1000g of water = 1.86K
Decide whether or not each metal dissolves in 1 M HCl. For those metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.
magnesium ion solution and another electrode composed of silver in a 1.0 M silver ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 °C. Standard reduction potentials
what is the theoretical yield for carbon dioxide. if 1.44 g of carbon dioxide is isolated from this reaction, what is the percent yield for carbon dioxide
Calculate the biological standard Gibbs energies of reactions of the following reactions and half-reactions: (a) 2 NADH(aq) + O2(g) + 2 H+(aq) ? 2 NAD+(aq) + 2 H2O(l) E? = + 1.4 V
What is the concentration of a nitric acid solution if a 10.00 mL sample of acid requires 31.25 mL of 0.135 M KOH for neutralization
How many grams of water can be cooled from 30 degrees C to 18 degrees C by the evaporation of 49g of water? (The heat of vaporization of water in this temperature range is 2.4kJ/g . The specific heat of water is 4.18J/k
Write balanced complete ionic equation for the following equation: Express your answer as a chemical equation.
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