What are some good problem statements

What is the concentration of OH - in pure water? a. 1.00 x 10-7 M c. 55.4 M b. 0.7 M d. 1.00 x 107 M

If I need 2.2 moles of CO2, and I have excess Fe2O3, how many moles of C do I need? 2Fe2O3 + C - -> Fe + 3CO2

What would be the danger of excessive inbreeding in animals such as dogs for example

A gas in a balloon at constant pressure has a volume of 120.0 mL at - 123°C. What is the volume at 27.0°C?

Why are both accuracy and precision important in making a measurement

In 1993 the Minnesota Department of Health set a health risk limit for chloroform in groundwater of 60.0 g/L Suppose an analytical chemist receives a sample of groundwater with a measured volume of 79.0 mL.

A good way for someone to identify similar substances is to measure their densities true or false

At 25 ∘c, kp = 25 for the reaction h2 (g) + i2 (g) ⇌2hi (g). at equilibrium, the partial pressure of both h2 and i2 is 0.296 atm. what is the partial pressure of hi at equilibrium?

In a resonant hybrid of a molecule like CH3CO2-, how are the electron orbitals of the carbon in CO2 sp hybridized?

Consider the formation of nitrogen dioxide and oxygen: NO (g) + O3 (g) ⇌NO2 (g) + O2 (g) The reaction is first order in O3 and second order overall.