Assume that you own Infosoft, a small software firm. You are currently leasing your office space and expect to make a lump sum payment (a single payment) to the owner of the real estate of $500,000 ten years from now.  Assume that an appropriate discount rate for this cash flow is 10%. What is the present value of this cash flow?

You have just made your first $2,000 contribution to your individual retirement account. Assuming you earn a 9 percent rate of return and make no additional contributions, what will your account be worth when you retire in 45 years? What if you wait 10 years before making a contribution? (Does this suggest an investment strategy?)

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moles of an ideal gas with a molar heat capacity at constant volume of cal/(mol·K) and a molar heat capacity at constant pressure of cal/(mol·K) starts at K and is heated at constant pressure to K, then cooled at constant volume to its original temperature. How much heat (in calories) flows into the gas during this two-step process?  Enter only a numerical value with three significant figures, no units.

A fixed amount of ideal gas is confined in a rigid container (constant volume). At 30°C the gas pressure is p. If the gass is heated until the temperature reaches 60°C, the pressure of the gas will be:          

An airplane is flying 3000 m above  the surface of the ocean.  Compared to the freezing point of water at the surface (1 atm), the freezing point of water in the airplane is:

A weather balloon contains m3 of hydrogen gas at a location at which the temperature is °C and the pressure is kPa. The balloon then rises to an altitude where the temperature is °C and the pressure is kPa. Assuming the balloon expands freely so that the gas pressure inside always equals the outside pressure, and the hydrogen is in thermal equilibrium with the air, what is the balloon’s new volume in cubic meter? Enter only a numerical value with three significant figures, no units.

Two samples of noble gases are compared: Sample A: 80 g of helium gas (He, molar mass = 4.0 g/mol) Sample B: 400 g of argon gas (Ar, molar mass = 40.0 g/mol) Which sample contains the greater number of moles of gas?

What is the electron configuration of Chromium (Cr)?

Gallium (Ar = 69.72) consists of two stable isotopes, Ga-69 and Ga-71. What is the relative abundance of Ga-71?