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Balance equation and determine the volume of air in liters at 35.0 degrees C and 790 mmHg necessary to burn 227 g of ethanol. Assume that air is 21.0 percent O2 by volume.
Dissolving 3.00 g of an impure sample of calcium carbonate in hydrochloric acid produced 0.656 L of carbon dioxide (measured at 20degrees C and 792mm/Hg). Calculate the percent by mass of calcium c
What is the mass of the solid NH4Cl formed when 73.0 g of NH3 are mixed with an equal mass of HCI? What is the volume of the gas remaining, measured at 14degrees C and 752 mmHg? What gas is it.
There are many automobile industries exploring different types of energy supplies other than gasoline. Conduct some research on these alternative fuel sources for automobiles.
What is the equilibrium constant and describe reaction rate. (Ex. Forward or reverse).
Find out the exact significant figures for the values.
Find out the exact significant figures for each of the values.
Find out the values are exact or inexact
We were given concentration and volume of a weak acid and were asked to determine dissociation constant of weak acid, in second question we were asked to find concentration of each species in soluti
We were given standard reduction potentials and were asked to find standard reduction potential for the half-reaction.
Examine the meaning of pH and [H+], the pH scale and why you're chosen substance is acidic. Use scientific notation or enough decimal places so that your answer has at least 3 place values. For exam
We were given mass and volume and we were asked to find limiting reactant, in second question we were asked to find percent by mass of oxygen in CaCO3.
An isotope of Gd has a half life of 25 minutes. How long would you have to wait for eight half lives to pass.
What is the pH of a solution of 0.81 M acid and 0.35 M of its conjugate base if the ionization Constant is 5.45 x 10-8.
What is the pH of the solution at the points where 24.5 and 25.5 mL of NaOH have been added? (Ka = 1.8 x 10-5)
What is the concentration (M) of Mg2+ when MgC2O4 (Ksp = 8.5 x 10-5) begins to precipitate from a solution that is 0.020.
Which of the following when dissolved in water has the highest concentration of magnesium ion.
Which of the following when dissolved in water has the highest concentration of barium ion.
What is the concentration of Cu2+ in a solution that is 0.10 M Cu(NH3)42+? (Kf = 1.2 x 1012)
What is the hydronium ion concentration of a solution of 0.720 M acid and 0.240 M of its conjugate base if the ionization constant is 4.38 x 10-6.
What is the hydronium ion concentration of a solution of 0.700 M acid and 0.440 M of its conjugate base if the ionization constant is 3.59 x 10-8.
The point at which an acid has completely reacted with or been neutralized by the base is known as the.
A 25.00 mL sample of 0.100 M CH3CO2H is titrated with 0.100 M NaOH. What is the pH of the solution at the points where 25.0 and 25.5 mL of NaOH have been added. (Ka = 1.8 x 10-5).
From the following Ho and So values predict which of reactions I, II, and III would be spontaneous at 25ºC.
The enthalpy and entropy change of a reaction are -26.1 kJ/mole and +3.89 J/mole K correspondingly at 25ºC. What is the free energy change in kJ/mole.