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Calculate the molality of a solution prepared by dissolving 4.75g of C10H8 in 75.0 mL of C6H6 (l) of density, 0.879g/mL.
What total mass of hydrogen is contained in 7.1 g of solution that is 51 % hydrogen peroxide
25.2 mL of qater are placed in a graduated cylinder. A 22.6 g stone is dropped in, and the water level rises to 32.4 mL. Find the stone's density.
Assume that the only amino acid in a particular protein that absorbs at 280 nm is tryptophan, and that this particular protein has 2 moles of tryptophan per mole of protein.
Calculate the values of Avogadro's number and the Faraday assuming the charge in an electron is 1.602 x 10^-19 coulombs/electron. Also calculate the mass the magnesium anode have lost during the process. The answers will be a number.
Two types of electrochemical cells which are based on thermodynamic principles can be described. Which of the following statements about these cells is correct
How much heat (in kj) is required to warm 13.0 C of ice, initially at -15.0 C, to steam at 113.0 C ? The heat capacity of ice is 2.09 J/gC and that of steam is 2.01 J/gC
Calculate the pressure of a sample of hydrogen gas collected over water at 24.7C when the barometric pressure is 729.8 torr (see vapor pressure table) PV=NRT
Vinegar is an aqueous solution of acetic acid. By law, it must contain 4 g acetic acid per 100 ml solution. What approximate volume of 0.10 M of NaOH would be neededto titrate a 15.00 ml aliquot of commercially availabe vinegar?
what is the pressure in atmospheres in a container of gas connected to a mercury-filled open-end manometer if the level
Alkanes are relatively inert except for two reactions, combustion and radical halogenations. Show all the products, intermediates and the flow of electrons in the following reaction.
Which of the following statements are true? For any false statements, explain. a) Nitric acid reacts with magnesium metal and copper metal.
How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/mol , and specific heat capacity, 4.184 J?g*K, as water over this temperature range.
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