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a solution of 3.8 g of acetic acid in 80 grams of benzene has a freezing point of 3.5 C. calculate the molar mass of the solute (acetic acid) and suggest what the structure might be.
what antibiotic woiuld you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid withou an insert? c) which phenotype will indicate the presence of plasmids that contain human DNA fragments?
Which of the flasks contains the least total ion concentration?
calculate the initial reaction rate when [O3] & [NO] remain essentially constant at the values [O3]0= 7.48 x 10-6 M & [NO]0= 3.26 x 10-5M
An ascorbic acid supplement was analyzed by titrating a 0.1000g sample dissolved in water with 0.0200M NaOH. A volume of 15.20 mL of the base was required to completely neutralized the ascorbic acid. What was the percentage by mass of ascorbic aci..
Large quantity of ammonia are burned in the presence of platinum catalyst to give nitric oxide as d first step in the preparation of nitric acid.
calculate the actual yield of magnesium nitrate formed from 113.9 g of magnesium and excess copper(II) nitrate.
Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air.
An analysis showed that 25.0 g of this hydrate, CoCl 2 * 6 H 2 O, contains 11.3 g of water. What is the percent water by weight in this hydrate?
What is the wavelength of a photon of electromagnetic radiation having a photon energy of 4.56X10^-19 J? Report your answer in nanometers, to the correct number of significant figures.
When sodium reacts with water, 255 mL of hydrogen gas forms along with sodium hydroxide. What mass of sodium is needed for this reaction?
What is the concentration of each species present when equilibrium is reached? b. What is the value of Kc for this reaction at 500K?
how many moles of CO2 are produced when 5.40 mol of ethane are burned in an excess of oxygen
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