Category: Uncategorized

Who led American efforts in Paris to gain French support during the Revolution?

Animals are unicellular organisms with cell walls.

This added roughly a half million square miles to the United States in 1848

List & describe two “precedents” established by George Washington as President.

In Equal Temperament, how many cents are in a M3?

Which is the correct order of events first to last

A note with a frequency of 724 Hz has a [higher pitch/lower pitch] than a note with a frequency of 440 Hz?

The Battle of First Bull Run was won by

“Midnight Appointments” to government jobs & positions are closely associated with the many such appointments by this president on his way out of office after losing re-election

In a catalytic converter, nitrogen dioxide, NO2, undergoes metal catalyzed reduction to form nitrogen, N2, and oxygen, O2. A balanced equation is provided below. The equation is written with an unconventional coefficient of 1/2 for nitrogen so that the equation is for 1 mole of nitrogen dioxide, so that energies can easily be calculated per mole. NO2(g)   →  1/2 N2(g)  +  O2(g) ΔHr = -33 kJ/mol ΔSr = +61 J/(mol.K) Given the provided enthalpy and entropy of reaction values, determine the Gibbs energy of this reaction at 500°C, the temperature inside a catalytic converter, and decide if the reaction is spontaneous or not at this temperature. Use the equation ΔG = ΔH – TΔS and remember to use the correct units throughout. K = °C + 273