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When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 36 L of water for your group.
What volume of fuel should you bring? Assume each of the following: the fuel has an average formula of C7H16; 15% of the heat generated from combustion goes to heat the water (the rest is lost to the surroundings); the density of the fuel is 0.78 g/mL; the initial temperature of the water is 25.0 C; and the standard enthalpy of formation of C7H16 is -224.4 kJ/mol.
To what volume should you dilute 54.0 mL of a 4.60 M KI solution so that 23.5 mL of the diluted solution contains 3.85 g of
An equilibrium mixture of this reaction at a certain temperature was found to have [NH3]= 0.270M and [H2S]= 0.360M. What is the value of the equilibrium constant (Kc) at this temperature?
Calculate the pH of 0.050 M Fe(NO3)3 solution. The hydrated Fe3+ ion is [Fe(OH2)6]3+. For [Fe(OH2)6]3+, Ka = 4.0 × 10-3
a gaseous sample of a compound has a gas density of 0.977 gl at 710.0 torr and 100.0 c. what is the molar mass the
Assume that the amino acids with ionizable side chains have the following pKas: Asp 3.65; Glu 4.25; His 6.0; Lys 10.53, Arg 12.48; Cys 8.18; Tyr 10.07. Also Assume that the a-amino group has a pKa of 9.62, and the a-carboxyl group has a pKa of 2.3..
occurring at 800 K and 1atm. The initial mixture contains 1 mol of SO2 and 0.5 mol of O2. The reaction mixture can be considered to be an ideal gas.
If 3.140g of ethanol is burned completely in a bomb calorimeter at 298.15 K, the heat produced is 92.82kJ. 1) Calculate delta H_combustion for ethanol at 298.15 K. 2) Calculate delta H_f for ethanol at 298.15 K.
Arrange the following solutions in order of decreasing freezing point: 0.20 m Fe(OH)2, 0.15 m C6H6, 0.10 m K3PO4, 0.15 m CH3COOH, 0.35 m KBr.
Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate Delta H vap for mercury (in kJ / mol).
depict the derivation of braggs law with your own drawings and commentary. what does the n represent in the equation?
Explain the general idea of the LCAO-MO method.
Write the reaction for the hydrolysis of propionyl propionate (an ester) -- that is, the reaction of this ester with water, yielding a carboxylic acid and an alcohol.
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