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An open-end mercury manometer was constructed from a U-shaped tube as well as connected to a gas container. In a particular measurement the level in the end of the tube connected to the gas container measured 76.2 cm above the U-neck while the level in the open end to the atmosphere was 23.8 cm above the U-neck. The outside air pressure in the laboratory was measured as 754 torr. Explain what is the pressure in the gas container?
what is the molality of particles in a solution containing 25.4 g of alno33 dissolved in 530. g of water? use molar
Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes, reacts with oxygen to give brown NO2 gas. 2 NO(g) + O2(g) ? 2 NO2(g) ?rH° = -114.1 kJ/mol-rxn
Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
Thermodynamic measurements reveal that ?H° = -66.3 kJ/mol and ?S° = -73.2 J/mole*K at 40°C. What is the equilibrium constant for the binding reaction at 40°C?
calculate the concentration of all soluble Hg(II) species. Which Hg(II) species is most prevalent? Assume there are no solids present, that the major ligands present are Cl- and OH-
A 0.6815g sample of alum is heated to drive off the waters of hydration, and the resulting KAL(SO4)2 weighs 0.3709 g. Determine the value of x AND the complete formula of alum.
Limestone (CaCO3) emits CO2 gas when exposed to HCl. Explain what is the theoretical yield of CO2 if 56.1 grams of limestone is entirely dissolved in HCl? CaCO3(s) + 2 HCl(aq)? CaCl2(aq) + CO2(g) + H2O(l)
Consider the two diagrams showing the energies (boxes) of each of four A particles and four B particles shown below. The dotted lines represent the allowed energies of each particle.
What is the molality of a solution that is composed of 265 g of acetone ((CH3)2CO) dissolved in 177 g of water.
Reaction with a secondary base (piperidine) as well as with diethyl malonate, and that this reaction proceeds as if it was done with a tertiary base
Calculate the energy requird to transform this steam into an ice cube at -20 degree C. Also, graph this phase change, with energy as a function of temperature
How many joules of energy are needed to melt 54 grams of ice at its melting point? Assume that the molar heat of fusion of ice is 6 kJ/mol.
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