Ph of the solution after certain minutes
A current of 10.7 A is applied to 1.25 L of a solution of 0.554 M HBr converting some of the H+ to H2 (g), which bubbles out of solution. What is the pH of the solution after 68 minutes?
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A flask holds 100ml. When empty, is mass is 125.54g. When filled with a solution of potassium bromide, the mass of the flask and solution is 425.54 g. What is the density of the solution?
In developing the melting point of a compound, if the heating is carried out too fast, would the observed melting point be higher or lower and why?
The lowest energy photons visible to the human eye have energy 164 kJ/mol. What is the wavelength of such a photon, in nm?
A gas occupies 85ml at 0°C and 710 torr. What temperature would be required to increase the pressure to 760 torr with the volume remaining constant?
In a titration, 35.84 mL of 0.2419 M HCl solution is required to completely neutralize 18.62 mL of Fe(OH)3 solution. What is the molarity of the Fe(OH)3 solution?
Calculate the standard emf at 25°C of the propane fuel cell given that delta G° formation for propane = -23.5 kJ/mol. The overall reaction for the fuel cell is:
A reverse osmosis unit is used to obtain drinkable water from a source that contains 0.870 g NaCl per liter. What is the minimum pressure (in torr) that must be applied across the semipermeable membrane to obtain water? Assume room temperature or
Molecular chlorine and molecular fluorine combine to form a gaseous product.Under the same conditions of temperature and pressure it is found that one volume of Cl2 reacts with three volumes of F2 to yield two volumes of the product. What is the fo
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Consider the freckles pedigree above. Circles are women, squares are men. Dark indicates that person has no freckles, open (white) indicates
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