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Sufficient of a monoprotic acid is dissolved in water to produce a 0.0166 M solution and the pH of the resulting solution is 2.60. Compute the pKa for the acid
Imagine a person accidentally swallows a drop of liquid oxygen, which has a density of 1.149 g/mL. Assuming the liquid drop has a volume of .075mL, calculate the volume that would be produced when the liquid vaporizes in the person's stomach at 37..
traces of iron and titanium. If the sapphire were found to contain 0.155 g of oxygen, what is the mass of the gemstone?
a 55.0g piece of copper wire is heated, and the temperature of the wire changes from 19.0C to 86.0C. The amount of heat absorbed is 1.4 kilojoules. What is the specific heat of copper?
a gas is placed in a storage tank a pressure of 30.0 atm 20.3oc as a safety device there is a small metal plug in the
A piece of chocolate cake contains about 400 Calories. A nutritional Calorie is equal to 1000 calories (thermochemical calories), which is equal to 4.184 kJ. How many 9-inch-high steps must a 180 pound man climb to expend the 400 Cal from the piec..
What weight of Pb(NO2)2 wil have to be dissolved in one liter of water to prepare a 100ppm Pb2+ solution.
A 1L steel tank is fitted with a safety valve that opens if the internal pressure exceeds 850 torr. It is filled with helium at 23 oC and 0.991 atm and placed in an oil bath.
Ethylamine, CH3CH2NH2, is an organic base with pKb = 3.367 at 298 K. In an experiment, a 40.0 mL sample of 0.105 mol L?1 CH3CH2NH2 (aq) is titrated with 0.150 mol L?1 HI(aq) solution at 298 K. (A) Write a balanced chemical equation for the neutral..
Write the reactions of cinnamic acid with sodium bicarbonate and sodium hydroxide. What is the gas that is evolved when cinnamic acid reacts with sodium bicarbonate
Determine the atomic weight of your metal: Calculate the percent error for each using the atomic weight (literature) off of the periodic table:
Predict the products of each of the following reactions. Assume that a reaction occurs in each case. write a balance equation for each one. Mg(s) + Zn(No3)2(aq) -->
calibration data for a f-ion-selective electrode using kf standard solutions prepared in buffer of 0.5 m ionic strength
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