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How many liters of pure oxygen gas, measured at 45.2 oC and 104.0 kPa, are required for the complete combustion of 5.60 liters of acetaldehyde gas (C2H4O), measured under the same conditions of temperature and pressure?
what is the molarity of a solution that contains 5.2g urea (molecular weight = 60 amu) in 250g of benzene?
How many grams of sodium formate, NaCHO2, would have to be dissolved in 1.2 L of 0.13 M formic acid (pKa 3.74) to make the solution a buffer for pH 3.61
Explain what observable patterns, if any are there in the heat behavior of chloride vs. nitrate salts and 1 monovalent cation vs. 2 cation divalent salts
when 24.0 g of glucose a nonelectrolyte are dissolved in 500. gof water the solution has a freezing point of
question a gas at 30 degrees c and 600 mmhg occupies a volume of 412 cm3. what is the volume in cm3 that the gas will
What mass of sucrose should be combined with 483 of water to make a solution with an osmotic pressure of 8.50 at 320 ? (Assume the density of the solution to be equal to the density of the solvent.)
The active ingredient of aspirin is acetylsalicylic acid, a monoprotic with a ka = 3.3 x 10 raised to -4 power. What is the pH of a solution dissolving two aspirin tablets, each containing 325 mg of acetylsalicylic acid, in 250 ml of water
The mass used to prepare Na2S2O3 solution was erroneously calculated too low. Will the reported molar concentration of the Na2S2O3 be too high, too low, or unaffected? Why?
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of 1.0 M NaH2PO4. How many moles of HCl must be added to this buffer solution to change the pH by 0.18 units
Consider the following reaction, where X represents and unknown element. 6X(s) + 2B2O3(s0 = B4X3(s) + 3XO2(g) If 165 grams of X reacts completely with diboron trioxide to rproduce 2.29 mol of B4X3.
Question- How many mmoles of HCl must be added to 160.0 mL of a 0.24 M solution of methylamine (pK b = 3.36) to give a buffer having a pH of 11.37
What mass of gold is produced when 7.00 A of current are passed through a gold solution for 49.0 min
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