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If A 230.0-mL sample of a 0.275 M solution is left on a hot plate overnight the following morning the solution is 1.50 M. Define what volume of solvent has evaporated from the 0.275 M solution?
Answer the following questions: a) can Al3+(aq) oxidize tin (Sn) under standard-state conditions?; b) would it be OK to store an aqueous AlCl3 solution in a tin container?; c) can Sn2+(aq) oxidize aluminum (Al) under standard state conditions?; d)..
how many moles of oxygen are consumed with the combustion of one mole of butane. C4H10?
A coal sample contains 3.28% sulfur by mass, which when burnt to provide electrical power, is converted to SO2. What is the volume of SO2, measured at 23 degrees C and 738 torr, when 2.7x10 ^6 lbs of this coal are combusted
a lead atom has a mass of 3.410-22g. how may lead atoms are in a cube of lead that has a volume of 2.00cm3 if the
if 2.0 g of helium gas and 5.46 g of oxygen gas are mixed togeher, what is the mole fraction of helium in the solution?
which of these solutions has the lowest freezing point?a. 0.25 m naclb. 0.5 m naclc. 1.5 m nacld. 2.0 m
The heat of fusion of water is 6.01kj/mol, and the molar heat capacity is 36.6 J/(K*mol) for ice and 75.3 J/(K*mol) for liquid water.
Is the molecular formula of saccharin (a) C14H10O6N2S2, (b) C5H7O3NS, (c) C8H9O2NS, or (d) C7H5O3NS?
Identify the Qual I cation(s) that is(are) confirmed present in a reference solution by: the formation of a precipitate. the color of a soluble complex ion. the characteristic color of a flame test
A 5.00-mL aliquot of a solution that contains 4.74 ppm Cu2+ is treated with an appropriate excess of 1,10-phenanthroline and diluted to 50.0 mL. The molar absorptivity of a Cu2+- 1,10-phenanthroline solution at 435 nm is 6940 L mol-1 cm-1. What is..
Calculate the molar mass of the unknown gas. (Remember that the faster the rate of effusion, the shorter the time required for effusion of 1.0 L; that is, rate and time are inversely proportional.)
The heat capacity of the calorimeter was 24.5J/0C and contained exactly 1250g water which increased from 24.620C to 27.430C. Calculate (Delta)U for the reaction in kJ/mol rxn
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