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A white solid unknown is readily soluble in water, and upon treatment of this solution with HCl, a colorless, odorless gas is evolved. This gas reacts with Ba(OH)2 to give a white precipitate. What anion is indicated?
A 330 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 626 mmHg. Calculate the moles of Ar present.
A covalent compound is composed of a nitrogen atom, a hydrogen atom, and a carbon atom. How many electrons should the Lewis structure of the covalent compound contain?
Suppose 1.07 g of FeCl3 is placed in a 75.0 mL volumetric flask, water is added, the mixture is shaken to dissolve the solid, and then water is added to the calibration mark of the flask. Calculate the molarity of each ion present in the solution.
how did rutherford interpret the observation that only a very few of the a particles were scattered by the gold foil
Consider these aqueous solutions: 0.20m NH4Cl, 0.20m CaCl2, 0.25m NaCl, and 0.30m sugar. Assume these are all ideal solutions. Which solution has the lowest vapor pressure
A 65 kg man is on ice skates. The skates' blades have a total contact area of 2.0 cm^2. How much pressure does the man exert on the ice
cus 2agno3aq cuno32aq 2agswhat mass of copper is required to remove all the silver from asilver nitrate solution
what is the energy of the light emitted in joules when an electron falls from the n=4 to the n=2 orbit in the hydrogen atom ? (E2= -328 kJ/mol , E1= -82 kJ/mol)
the thermal decomposition of n2o5 obeys first order kinetics.at 273k a plot of lnn2o5 vs. t gives a slope of -5.34
calculate the amount of heat required to completely sublime 50.0 g of solid dry ice at its sublimation temperature. the
Determine how much heat (in kJ) is needed to warm 12.0g of ice, that is initially at -10.0 ° C, to steam at 114.0 ° C? The heat capacity of ice is 2.09 J/g⋅ ° C and that of steam is 2.01 J/g⋅ ° C.
Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br- and C9H7N is quinoline
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