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The pKa of acetic acid, HC2H3O2, is 4.76. A buffer solution was made using an unspecified amount of acetic acid and 0.30 mol of NaC2H3O2 in enough water to make 1.50 L of solution. Its pH was measured as 4.50 on a meter. How many moles of HC2H3O2 were used?
Order of a reaction, Consider a kinetic study of oxidation of a new plastic stabiliser being proposed for the automobile industry. Stabiliser + H+ + O2 ----> Byproduct
Chromium metal can be plated from an acidic solution of CrO3. CrO3(aq) + 6H+(aq) + 6e- -> Cr(s) + 3H2O How many grams of chromium will be plated by the passage of 19,300 C (coulombs)?
A cylindrical glass tube 15.0 cm in liength is filled with ethanol. The mass of ethanol needed to fill the tube is found to be 9.64g.
Calculate mass, mole fraction and avg. molecular weight of air, Calculate the constituent (a) mass, (b) mole fraction (c)average molecular weight of air at 25 degree centigrade, 1 atm, and molar density of all listed gases
56.9 mL of water is added to 24.9 mL of 0.125 M KOH solution. What is the new molarity?
Suppose that 1.06 g of rubbing alcohol (C3H8O) evaporates from a 64.0-g aluminum block. If the aluminum block is initially at 38°C, what is the final temperature of the block
If a raindrop weighs 57 mg on average and 5.1 X 10^5 raindrops fall on a lawn every minute, what mass of rain falls (in kg) on the lawn in 1.5 hours?
Determine the rate law and the value of k for the following reaction using the data provided
A calorimeter contains 27.0 mL of water at 11.0 C. When 2.10 g of X (a substance with a molar mass of 74.0 g/mol) is added, it dissolves via the reaction X{(s)}+H_2O{(l)} -> X{(aq)}
The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
what is the work in joules done on the system to compress He gas from 24.0 L to 12.5 L against a pressure of 1.5 atm at a constant temperature of 37.4 C?
Balance the following molecular equations for these reactions. Write the ionic equation for the reactions. Write the net ionic equation for the reactions.
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