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1.Calculate the heat capacity of methanol (methyl alcohol) at 40°C.2.6kg of methanol at 15 C enter an evaporator. They exit as vapour at the boiling point. Claculate teh required energy input to the methanol ( use heat capacity from no.1)
Strontium carbonate decomposes upon heating to strontium oxide and carbon dioxide. Calculate the number of g of carbon dioxide produced by heating 10.7 g of strontium.
a balloon is filled to a volume of 7.00 times 10^2 mL at a temperature of 20.0 degrees celcius. the balloon is then cooled at constant pressure to a temperature of 1.00 times 10^2 K. what is the final volume of the balloon?
The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm. Calculate the number of grams of sodium used in the reaction. (Vapor pressure of water at 25°C = 0.0313 atm.)
How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
Determine osmolarity of solution when 25.0 grams of aluminum chloride dissolves in 2.50 liters of H2O.
Vitamin b6 is needed in the metabolism of amino acids. When it binds to an enzyme it forms a complex with the e-amino group of lysine, which is a primary amine.
When 31.7mL of 0.235M Potassium hydroxide is required to completely neutralize 26.0mL of a HC 2 H 3 O 2 solution, calculate the molarity of the acetic acid solution.
A 100.0-mL sample of 0.10 M NH3 is titrated with 0.10 M HNO3. What is the pH of the solution after 100.00 mL of acid have been added to the ammonia solution?Kb = 1.8 × 10-5.
What is the most appropriate temperature for storing your protein between purification steps? a) Room temperature b) 4° C c) -20° C d) -80° C
A flask contains a mixture of Ne(g) and Ar(g). There are 0.250 mol of Ne(g) which exerts a pressure of 205 mmHg. If the Ar(g) exerts a pressure of 492 mmHg.
what is the global pH change incurred after injection of the HCl? What would the pH change be if the same amount of 1.000 M HCl were put into a gallon of pure water?
How many grams of Na3PO4 will be needed to produce 425mL of a solution that has a concentration of Na+ ions of 1.10M ?
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