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1.The radioactive isotope tritium decays with a first-order rate constant k of 0.056 year-1. What fraction of the tritium initially in a sample is still present 30 years later? 2.A boiled egg can be cooked at 100.00C in exactly 5 minutes. At an altitude of around 2000 m where the boiling point of water is 93.00C, it takes exactly 7.5 minutes to cook the egg to the same amount. What is the activation energy for the reaction involved when an egg is boiled? 3.Barbiturates are synthetic drugs used as sedatives and hypnotics. Barbital ( M = 184.2 g/mol) is one of the simplest of these drugs. What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid? 4.Barbiturates are synthetic drugs used as sedatives and hypnotics. Barbital ( M = 184.2 g/mol) is one of the simplest of these drugs. What is the boiling point of a solution prepared by dissolving 42.5 g of barbital in 825 g of acetic acid?
Draw structure for the product from reaction of 1,3-cyclohexadiene and maleic acid (cis-2-butenedioic acid).
Suppose you have a sample of sodium weighing 11.50 g. How many atoms of sodium are present in the sample? What madd of potassium would you need to have the same number of potassium atoms as there are sodium atoms in the sample of sodium.
draw the major diels-alder product formed in the given reaction. all hydrogen atoms are implied. if a chiral carbon
A compound contains only carbon, hydrogen, and oxygen. Combustion of 10.68 mg of the compound yields 16.01 mg CO2 and 4.37 mg H20.
how many grams of sucrose c12h22o11 must be added to 500.0 g of water at 100 degc to change the vapor pressure to 752
Draw the two possible products of the reaction between benzaldehyde and methylethylketone.
A mixture of amino acids is subjected to paper electrophoresis at pH 6.0. The amino acids present in the mixture are Val, Glu, Phe, Ser, and Lys. Which amino acids will migrate toward the cathode? Toward the anode? Explain.
Calculate the volume of 6.0 M sulfuric acid H2SO4 solution required to neutralize the excess potassium hydroxide, KOH, solution from the first step of the synthesis. Indicate clearly your calculations and reasoning.
Is 1.39 at 400oC. Suppose that 1.4 mole of P4 (g) and 1.25 mol of P2(g) are mixed in a closed 25.0-L at 400oC. Determine the reaction quotient and the direction of the reaction.
Explain why is the water solubility of t-butyl alcohol greater than that of n-butanol? Explain why does the water solubility of alcohols decrease as the chain length increases
A solution of sugar is in equilibrium with solid sugar. If more solid sugar is added to this mixture what would happen
how many grams of concentrated hydrochloric acid containing 37.9 hcl by weight will give 5.0 grams of pure
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