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Using concentrated acetic acid and solid sodium acetate, how would you prepare 10 l of 0.1 M acetate buffer at pH 4.75? The pKa for acetic acid is 4.75. What Volume of concentrated acetic acid is needed (mL)? What mass of sodium acetate is needed (g)?
calculate What mass of AlBr 3 is formed and calculate what mass of CCl 4 will be formed if 1.5 moles of CH 4 react with 1.4 moles of Cl?'
Consider a heat engine operating between 1200 K (TH) and 400 K (TC), What if we combust 1 liter of ethane to supply qh, how much work would we expect
The ester ethyl p-nitrobenzoate is more reactive towards nucleophilic acyl substitution than ethyl p-methyoxybenzoate.
When 4.70 g of a nonelectrolyte solute is dissolved in 915 mL of water at 21 degrees C, resulting solution exerts an osmotic pressure of 839 torr. What is the molar concentration of the solution?
Consider the reaction 2 Al2O3(s) ! 4 Al(s) + 3 O2(g) . H = +3339.6 kJ/mol What is H for the formation of one mole of Al2O3(s) from the elements.
The density of a gaseous compound was found to be 1.23 g L-1 at 330 K and 25.5 kPa. What is the molar mass of the compound?
If an aqueous solution (solvent = water) is 0.5 molal in NaClO, what is the mole fraction of NaClO that is present? Hint: assume you have 1.00 kg of total solvent in your sample.
along with the weight of sodium acetate (4.01g) and the volume of acetic acid used (10mL) to prepare the buffer, the expected pH of it was 5.43. What is the expected pH of buffer plus added HCl?
Select the strongest interparticle force(s) present in Mg3N2.
An unknown compound contains only carbon, hydrogen, and oxygen(CxHyOz). Combustion of 5.50g of this compound produced 8.07g of carbon dioxide and 3.30g of water.
If it takes 50.0 mL of 0.0250 M K2Cr2O7 to titrate 30.0 mL of a solution containing Fe2+, what is the molar concentration of Fe2+?
If a 1000 kilogram sample of rock is 0.021% gold by mass. How much zinc is needed to react with the gold extracted from the rock?
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