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A sample of a gas originally at 29 °C and 1.25 atm pressure in a 3.0 L container is allowed to contract until the volume is 2.2 L and the temperature is 11 °C. What is the final pressure of the gas? (You can assume that the number of moles of gas remains constant).

What volume of a 6.0 M solution of NaOH must be diluted to 185.6 mL in order to make a 3.23 M NaOH solution?

Given the data in the table below, what is ∆Hºrxn for the following process? 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (l)  

When solid KCl dissolves in water, which of the following processes has a negative value of ∆H?

What is the mass % of Pb in the compound, Pb(NO3)2?

What is the frequency (in Hz) of green visible light with a wavelength of 550 nm?

The phase diagram for an unknown compound is shown here. What is the approximate, normal melting point of this substance?

Arrange the following gases in order of increasing average molecular speed at 25 ºC: Cl2, F2, N2, O2

Arrange the following three substances: NO+, NO2-, and NO3- in order of increasing (weakest to strongest) N-O bond strength.

Which technique is considered best when performing ratio analysis on a business