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If 60.0 g of H3PO4 is dissolved in enough water to form 175 mL of solution, what is the molarity (M) of the solution
the particle , electron is in lowest possible enrgy state. what is the probability of finding electron between 0.2 nm to 0.35 nm from one side of the wall.?
Identify the Lewis acids in the following two equilbrium systems: System A: CO2 + H2O ? H2CO3 System B: Zn2+ + 6H2O ? Zn(H2O)62+ A. A: H2O; B: H2O B. A: CO2
Calculate the number of moles of an ideal gas in a 250. mL sealed container that has a pressure of 788 torr and a temperature of 72.1 degrees F.
Calculate Ka for acetic acid in both the molal and molar standard states. Use as many sig figs as your calculations in part b.) warrant.
which is used as a sugar substitute, is produced by the reduction of D-xylose. Draw xylitol. show all hydrogen atoms, and connect the appropriate atoms using bonds
A tanker truck carrying 5.0 103 kg of concentrated sulfuric acid solution tips over and spills its load. If the sulfuric acid is 94.0% H2SO4 by mass and has a density of 1.84 g/mL, how many kilograms of sodium carbonate must be added to neutralize..
At 25°C the heat of fusion of aluminum is 10.6 kJ/mol and the heat of sublimation is 326.4 kJ/mol. What is the heat of vaporization of aluminum at 25°C?
A 0.1276g sample of a monoprotic acid (molar mass = 1.10 x 10^2) was dissolved in 25.0 ml of water and titrated with 0.0633 M NaOH. After 10.0 ml of base had been added
A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples.
A flask contains 0.250 of liquid bromine, . Determine the number of bromine molecules present in the flask.
A standard Na solution with a concentration of 1.75 ?g/mL Na is added to an unknown concentration of Na. Based on the data below, determine the original concentration of Na as well as its uncertainty in a pure unknown sample.
What effect on the boiling point of a liquid is produced by: a) The presence of a soluble non-volatile impurity?
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