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Calculate the pH or the hydrogen ion concentration as required for each of the following substances:
a) 0.075M acetic acid
b) 2.5 x 10^-5 M hydrochloric acid
Draw a phase diagram labeling all the above points. Also label the melting point curve, the boiling point curve, and the solid, liquid, and gas regions.
Find the number of automobiles whose total mass is the same as 1.0 mol blueberries if The mass of an average blueberry is 0.77g and the mass of an automobile is 2000 kg ?
What is the molarity of a HCl solution if the reaction of 223 mL HCl with excess CaCO3 produces 10.7 L CO2 gas at 714 mmHg and 36°C?
a 100-rm w lightbulb is placed in a cylinder equipped with a moveable piston. the lightbulb is turned on for
Given the equilibrium constant, Kp, of 2.40 x 10-3 at 1000 K for N2(g) + 3H2(g) equation 2NH3(g), what is the equilibrium constant for NH3(g) equation 1/2N2(g) + 3/2H2(g) at 1000 K
What is the pH of a solution that has an initial concentration of 0.25 M oxalic acid and 0.35 M oxalate ion? Consider only the first ionization of oxalic acid (Ka = 5.9 x 10-2).
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?
With respect to the Cooper pair model, explain why increasing temperature reduces the effectiveness of low-temperature superconductors.
The decomposition of HI(g) is represented by the equation 2HI(g) H2(g) + I2(g) Kc= 64 at 25°C. If the equilibrium concentrations of H2 and I2 at 400°C are found to be [H2] = 9.3x10-4 M and [I2] = 1.6x10-3 M, what is the equilibrium concentration o..
A solution of H2SO4(aq) with a molal concentration of 4.80 m has a density of 1.249 g/mL. What is the molar concentration of this solution
The first steps in the radioactive decay of 257 Uuh involves the rapid and successive emission of 2 alpha particles. [Note: Uuh is the symbol for ununhexium, which is element number 116.]
A 6.50 gram sample of an ore containing chromium is dissovled and then treated with an excess of Na3PO4 (aq), which precipitates out all of the chromium in the ore as chromium (III) phospate, CrPO4.
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