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Which atomic orbitals are represented by the electron density plots pictured below?

The temperature of a 15 g sample of lead metal increases from 22 ºC to 37 ºC upon the addition of 29.0 J of heat. What is the specific heat of lead (in J/g-K)?

Which process below is endothermic?

Which of the following is classified as a decomposition reaction?

What volume (in mL) of a 0.827 M KOH solution is required to neutralize 35.00 mL of 0.737 M H2SO4? (Hint: You’ll want to start by writing a balanced equation for the process)

If a particular process occurs at constant pressure and there is no change in enthalpy (∆H=0), what can you conclude about ∆E, q, and w?

For which of the following reactions is the value of ∆Hºrxn equal to ∆Hºf for the product?

How much work (in kJ) is done during a reaction in which the internal volume expands from 23.0 L to 58.0 L against an outside pressure of 3.50 atm?

Which of the following combinations of aqueous solutions will form a precipitate?

What is the concentration (M) of an aqueous solution of methanol when 0.200 L of a 2.00 M solution is diluted to 0.800 L?