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At 0.967 atm, the height of mercury in a barometer is 0.735 m. If the mercury were replaced with water, what height of water (in meters) would be supported at this pressure? The densities of Hg and H2O are 13.5 g/cm3 and 0.997 g/cm3, respectively.
How many grams of dry NH4Cl need to be added to 1.80L of a 0.400M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.90? Kb for ammonia is 1.8*10^-5.
An amphoteric compound exhibits a. acidic properties b. acidic and basic properties c. metallic properties d
How long would it take for a radioactive isotope with a half life of 2 weeks to lose at least 70% of its radioactivity? Describe two clinical uses of Radioactivity.
A certain substance has a heat of vaporization of 74.45 kJ/mol. At what Kelvin temperature will the vapor pressure be 6.50 times higher than it was at 287 K
Sodium bicarbonate is often used as an antacid to neutralize excess hydrochloric acid in an upset stomach. What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate?
Hydrochloric acid is added to zinc. How many mls of 0.500 M HCl are needed to react completely with 25.0 g of zinc metal
A is the sequence Na, Mg, Al, Si, and P. B is the sequence He, Ne, Ar, Kr, and Xe. Which statement below is true. The members of B are decreasing in size.
What is the product when phenylmagnesiumbromide (grinard reagent) is reacted with Ch3Ch2CN in ether and H3o+?
At 0.0 degrees C, if the volume of air is 2.5 mL and the pressure of the atmosphere that day is 805 mmHg, what is the number of moles of air.
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180 g/mol, what is the molarity of the solution
What is the freezing point of a solution of 1.17 g of 1-naphthol, C10H8O, dissolved in 2.00 mL of benzene at 20°C? The density of benzene at 20°C is 0.876 g/mL. Kf for benzene is 5.12°C/m, and benzene's normal freezing point is 5.53°C.
Draw the Lewis structures for calcium carbonate and magnesium hydroxide.
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