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The gas with an initial volume of 24.0 L at a pressure of 565 mmHg is compressed until the volume is 16.0 L. What is the final pressure of the gas, assuming the temperature does not change?
When 36.4 g of calcium and 11.1 g of water are reacted according to the following equation: Ca(s) + 2H2O(l) → Ca(OH)2(s) + H2(g) How many liters of hydrogen gas at a pressure of 727 mm Hg and a temperture of 47.8 °C are produced?
A 60.00 mL sample of 0.075 M benzoic acid was titrated using 0.050 M KOH. What will be the pH at the equivalence point in the titration.
What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration of HCl?
Calculate the molar absorptivities for In- at 454 and 654nm, set up two simultaneous equations, and determine the molar concentrations of HIn and In- in the buffer solutions
For methanol, CH3OH, the molar enthalpy of fusion is 3.16 kJ/mol at the melting point T=175.2 K. Calculate the freezing point depression constant,k, of methanol
which of the following shows the acids in order from strongest to weakest? The order of atomic radii is I > Br > Cl
A sample of molten iron occupies a volume of 7.11 x 10-3 L. If the density of iron is 7.86 g/cm3, what is the mass of iron in grams in the sample?
HClO is a weak acid (Ka = 4.0 × 10-8) and so the salt NaClO acts as a weak base.
For a reaction at equilibrium, which of the following is the best way to think about it?
Calculate the number of bromine molecules present in the flask if A flask contains 0.350mol of bromine, Br2 in liquid form .
Consider the zinc atoms of ZnSe. With what pairs of atoms could the Zn be replaced to make another isoelectronic solid
What would the absorbance readings be for the acid and base forms of methyl red indicator at the acid wavelength? At the base wavelength?
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