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A buffer is made up of 355 mL each of 0.200 M NaHCO3 , and 0.134 M Na2CO3 . Assuming that volumes are additive , calculate
A. The pH of the buffer
B. The pH of the after the addition of 0.0300 mol of HCl to .710 L of buffer
C. The pH of the after the addition of 0.0300 mol of KOH to .710 L of buffer
A mixture of nitrogen and hydrogen was allowed to come to equilibrium at a given temperature according to 3H2+N2 2NH3. At equilibrium, the mixture contained
How many grams of MgO are produced when 40.0 grams of O2 react completely with Mg
A turn-of-the-century chemist isolated an aromatic compound of molecular formula C6H4Br2. He carefully nitrated this compound and purified three isomers of formula C6H3Br2NO2, one of which was obtained in very small amounts. Propose a structure fo..
what concentration of Ba(OH)2 solution is left after complete precipitation of BaS. What is the mass of BaS Precipitated
Some insects produce antifreeze in cold weather; the antifreeze is glycerol. How much glycerol must an insect produce per gram of body fluid (taken to be water) to survive at -5.0C
The solubility of silver sulfate in water is 0.223% (w/v) at 35°C. Calculate the solubility product of this salt at this temperature
What is the concentration of the Pb(NO3)2 in the voltaic cell pictured above when Ecell=0.524V at room temperature?
What will be the volume of the gas sample if the pressure increases to 780 mm and the temperature increases to 35°C
An equilibrium mixture of SO2,O2 and SO3 gases at 1500k is determined to consist of 0.244 mol/L SO2, 0.172 mol/L O2 and 0.56 mol/L SO3.
A compound with the empirical formula CH2O was found to have a molar mass between 89 and 91 g. What is the molecular formula of the compound?
Solid strontium hydroxide is added to a solution of nitric acid. How many moles of strontium hydroxide are needed to react completely with 500. mL of 0.40 M nitric acid?
What is the purpose of dissolving the acetanilide in glacial acetic acid prior to beginning the nitration reaction? What happens when you mix sulfuric acid with nitric acid?
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