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How many grams of benzoic acid would you add to 30 mL of 0.27M sodium benzoate in order to prepare a buffer solution at pH=4.5?Ka of benzoic acid is 6.3E-5.
If the caffeine concentration in a particular brand of soda is 3.35 mg/oz, drinking how many cans of soda would be lethal?
Determine the V of a voltaic cell (E°cell) if it is required to do 5.43 × 10¯3 Kilo Joule of work when a charge of 2.50 C is transmitted.
Which corresponds to approximately 2.65 * 104 mol of electrons at the voltage of a fuel cell and calculate how much heat energy is absorbed?
If a raindrop weighs 53 mg on average and 5.1 105 raindrops fall on a lawn every minute, what mass (in kg) of rain falls on the lawn in 3.0 h.
What is the heat of combustion per gram of butane?
During a photochemical smog episode in a coastal city, the steady-state concentration of oxygen radicals at ground level was measured to be 0.09 ppmv at 25 degrees celsius.
Historically, the solid residue that is left after the methylene chloride solution is evaporated has a lower melting point that its literature value, due to impurities. Explain what impurities are present and why.
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.30 MJ of energy (in the form of heat) if the temperature of the sodium
Based on the half-reactions and their respective standard reduction potentials below, which addition to an aqueous solution containing Fe(NO3)2 will result in a reaction under standard-state conditions?
how many square meters of floor space are there in a room which has 225.0 square yard of floor space 1 m=39.37 in, 1 yard =36 in.
Calculate the pH of 0.103 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10^-3, Ka2 = 6.2 x 10^-8, and Ka3 = 4.8 x 10^-13.
If iron(III) acetate is added to be 1 x 10^-10 M in a solution that is 0.10 M NH3, what is Qsp and will Fe(OH)3 precitate? the Ksp of Fe(OH)3 is 4x10^-38 and Kb for NH3 is 1.8x10^-5
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