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The specific gravity of mercury is 13.64 . What would be the mass of a sample of mercury that occupies a volume of 4.55 mL?
What is the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2? The Ka for acetic acid is 1.8 x 10-5.
what mass of naphthalene must be dissolved in 24000 grams of benzene to give a solution with a freezing point 3.00 celsius below that of pure benzene?
When 7.00 moles of gas A and 3.00 moles of gas B are combined, the total pressure exerted by the gas mixture is 1.0 atm. What is the partial pressure exerted by gas A in this mixture?
Ionization energy is the energy needed to eject an electron from an atom. Compute the ionization energy of a hydrogen atom in its first excited state (n = 2).
A student used 22.0 mL of 0.1035 M NaOH to titrate 20 mL of orange juice. How many grams of citric acid were present in the sample? The molar mass of citric acid, H3C6H5O7, is 192.12 g/mol. H3C6H5O7(aq) + 3NaOH(aq) Na3C6H5O7(aq) + 3H2O(l)
How much work (in J) must be done to inflate the balloon when atmospheric pressure is 767 torr?
Write an orbital diagram for the ground state of the Calcium atom. Is this atomic substance diamagnetic or paramagnetic
Write balanced equations for the reactions pf phenylmagnesium bromide and trityl fluoborate with water
Determine the molar solubility for Copper (II) hydroxide in (a) a water solution at 25 degrees Celsius, and (b) in a solution having a pH of 8.75 at 25 degrees Celsius.
Draw the resonance contributors of pyrrole and the cyclopentadienyl anion to demonstrate that all atoms are sp2 hybridized.
What is the total quantity of heat required to do this? The melting point of Pb is 327.4 degrees celsius; its heat of fusion is 4.774 kJ mol-1; its average heat capacity in the temperature range from 51 to 327.4 deg. celsius is 0.134 J g-1K-1.
A zero-order reaction has a constant rate of 1.50×10?4. If after 55.0 seconds the concentration has dropped to 4.50×10?2, what was the initial concentration?
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