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A sample of gas occupies a volume of 685 mL at 1.21 atm and 95 oC. Calculate the pressure of the gas if its volume is changed to 891 mL while its temperature is held constant. a) The pressure is 0.00253 atm. b) The pressure is 0.00428 atm. c) The pressure is 0.635 atm. d) The pressure is 1.57 atm. e) The pressure is 0.930 atm.
At 25 degrees Celsius the rate constant for the first-order decomposition of a pesticide solution is 6.40 x 10^-3 min^-1 If the starting concentrate of pesticide is 0.0314M what concentration will remain after one hour at 25degreesC
How much pressure is caused by 0.0201 mol of N2 and H2O in the flask under the specified conditions?
Determine the freezing point of an aqueous solution that is 1,7 m in ethylene glycol. The freezing point depression constant for water is 1.86°C/m The freezing point of pure water is 0.0°C.
A maximum of 1.89 mg of AgCl will dissolve in 1.00 L of solution at 25.0 C. A maximum of 5.26 mg of AgCl will dissolve in 1.00 L of solution at 50.0 C. Use this information to calculate standard enthalpy change and standard free energy change for ..
The mass of a cube of iron is 252 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
a mixture of 0.140 moles of C is reacted with 0.117 moles O2 in a sealed, 10.0 L vessel at 500 K, producing a mixture of CO and CO2. the total pressure is 0.640 atm. What is the partial pressure of CO
A sample of gasoline contains various hydrocarbons, which comprise atoms of carbon, hydrogen, and oxygen. The hydrocarbons mix together uniformly to form gasoline.
A student wants to make a pH 4.0 buffer solution. She decides to use a buffer made from formic acid and sodium formate (NaCOOH).
How then, how would I calculate the pH of a buffer + NCl after taking 32 mL of the solution noted above and pipet 1.0 mL of 6.0 M HCl with the pH of buffer + HCl = 4.41
Give the structure that corresponds to the following molecular formula and 1H NMR spectrum: C7H12Cl2: ? 1.07 (integral = 6203, s); ? 2.28 (integral = 1402, d, J = 6 Hz); ? 5.77 (integral = 700, t, J = 6 Hz).
After you have made your observations, you can release the vacuum and allow the pressure inside to return to atmospheric pressure. Do this by removing the pumper and squeezing the rubber septum as indicated.
Determine the subunit composition of this protein from the following information: 10 points Molecular mass of the native proteinby gel filtration is 300 kD Molecular mass by SDS-PAGE
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