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How many moles of H3O+ must be added to one liter of a solution to adjust the pH from 8.54 to 5.58? Use E notation and 3 significant figures.
Determine the final temperature achieved in this expansion, and the corresponding work done by the gas for the cases that it is 1) Helium, 2) Krypton.
A solution of ammonia and water contains 4.20×10^25 water molecules and 6.90×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 710.0 torr at 64.7°C. What is the mole fraction of methanol in this solution?
1.00 mol Zn reacts with excess hydrochloric acid, 1.00 mol H2 gas is produced. At 25ºC and 1.00 atm= 101,325 Pa, this amount of H2 occupies 24.5 L (= 24.5 x10-3 m3). How much work is done by the chemical system.
Determine freezing point of solution which contains .31 mol of sucrose in 175g H2O. kf=1.86 degreesC/m
calculate the molecular weight of Isoamyl acetate with a density of 0.876. Then calculate the theoretical yield of isoamyl acetate in ml, grams and moles. Show all work and calculations.
at 80 degrees celsius the vapor pressures of pure liquids X,Y and Z are 385, 190,and 66 mm Hg, respectively. What pressure must be exerted on the surface of a solution containing one mole of X, three mole of Y, and two moles of Z for boiling to be..
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 13.0 L
What is the entropy of the combustion above?
how many mL of 1.00 M hydrochloric acid is needed to prepare a 100.0 mL solution of hydrochloric acid with pH = 5.0 that also contains 0.01667 M MgCl2?
How many joules of heat are required to heat 143 g of aluminum from 55.0 oC to 66.5oC?
if 2.325g of an unknown acid compound is made up to 200.0 mL with water. 10.00 mL of the resulting solution requires 15.43 mL of 0.1808 M NaOH.
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