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A 24.6 mL volume of HCl solution reacts completely with a solid sample of magnesium carbonate, producing 183 mL of gaseous product (there is only one gaseous product from the reaction). The gaseous product is collected over water at 24.0 degrees C and 728 torr pressure. What is the molarity of the solution?
The heat of combustion of cyclobutane is 650.3 kcal/mol. How much energy is released during the complete combustion of 450 grams of cyclobutane.
the concentrations of the four main individual ionic compouns are 0.48 M NaCl, 0.090 M MgCl2, 0.0250 M CaCl2 and 0.0050 M KCl. what is the total mass of salt in one liter of seawater?
Calculate the [H3O+], pH, and the fraction of dissociation (α) in an aqueous 0.140 M NH3 solution. (Hint: You will need the Ka, located in the back of your textbook.)
Include activity coefficients in your solubility-product expression. The Ksp of Hg2I2 is 4.6× 10-29.
Calcium carbonate is relatively insoluble and the dissolution reaction is endothermic: CaCO3 ---> Ca2+ CO3^-2
Nitrogen dioxide decomposes according to the reaction 2NO2(g) 2NO(g) + O2(g) where Kp = 4.48 × 10-13 at 25°C. What is the value for Kc?
Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 75 meters and a wind-conversion efficiency of 25 percent.
How many valence electrons are there for the POCl3 molecule? Draw a reasonable Lewis structure for POCl3. Assign formal charges for the atoms in your Lewis structure
A 50% by mole solution of ethanol and water is prepared. Both their partial volumes do not equal their pure partial volumes. The total volume is observable, however, there are two unknowns. Using an approximation how can two partial volumes be mea..
The following reaction is first order, C2H6---> 2CH3. If the rate constant is equal to 5.5x10^-4s^-1 at 1000K, how long will it take for 0.35 mol of C2H6 in a 1.00 L container to decrease to 0.20 mol in the same container
a liquid unknown was found to be inslouble in water & soluble in cyclohexane & alcohol; the unknown was found to have a boiling point of 58 degress celsius at 670mm Hg. What is the substance? What could you do to confirm your answer?
what are the standard half cell potentials; E anode and E cathode? If the electrochemical cell is allowed to operate as a gavanic cell, which solution species will be oxidized, which solution species will reduce
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