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Explain in your own words what consitutes a buffer solution. Then explain how this solution resists changes in pH when strong acids or strong bases are added to it.
What mass of sucrose (C12H22O11) should be combined with 494 g of water to make a solution with an osmotic pressure of 9.00 atm at 320 K?
Suppose that at a particular moment during the reaction, molecular hydrogen is reacting at the rate of -0.555 M/s. (a) At what rate is ammonia being formed?
How many ml of 0.05 M HCl solution would be required to completely neutralize 25.0 ml of 1.0 M Ba(OH)2 solution?
Determine how many micrograms of herbicide are present in 10 lb of soil if the herbicide level in the soil in a corn field was observed at 3.0 ppb. ?
Based on the Henderson-Hassalbach equation how many mmols of Tris-HCl are there in a 100 mL of a 100 mM Tris-HCl buffer solution at pH 8.1? Note that the 100 mM refers to the sum of Tris and Tris-HCl concentrations. Answer in mmols
A cook wants to heat 1.75 of water from 26.0 to 100.0 If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn? Natural gas produces 49.3 of heat per gram.
A 5.325g sample of methyl benzoate, a compound found in perfumes, was found to contain 3.758g of carbon, 0.316g of hydrogen, and 1.1251g of oxygen.
An oligomeric protein has a molecular weight of 168000. A 420 mg sample was treated with an excess of 1-fluoro-2,4-dinitrobenzene (Sanger\'s reagent) until the reaction was complete
What units do chemistry normally use for density of liquids and solids? for gas density? Explain the differences
Calculate the electrode potential of the following half cell if it was at standard conditions. Then recalculate how this changes using.
a piece of gold jewelry that weighs 9.35 g and has a volume of 0.654 cm3. The density of pure gold is 19.3 g/cm3 and the density of pure silver is 10.5 g/cm3.
The enthalpy of combustion of methane, Ch4, is -890 KJ/mol. If the gas flow rate of the methane to the burner of a stove is 5 L/min at 25 degrees celsius and assuming complete heat transfer from combustion
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