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Rust has the formula Fe2O3 and it’s made from iron metal reacting with oxygen over time.  Assume you had a [x] g block of pure iron metal than fully oxidized to rust and the mass of that product was [y] g.  What must have been the mass of oxygen that initially reaction with pure iron?

Which study design is best described by the following: unable to provide data on absolute risk?

I understand that this quiz is ungraded.

A solution has a mass of [x] grams, and a volume of [y] mL.  What is the density (g/mL) of this solution? Report answer to 3 decimal places?

Rutherford’s gold foil experiment showed that:

Students’ comments from the Fall 2023 course evaluation on knowledge learned in the course:

A sample of metal has a mass of [m] grams.  What is this mass in milligrams? 

Which study design is best described by the following: inefficient for rare outcomes?

Which study design is best described by the following: efficient if long delay between exposure and outcome?

Which study design is best described by the following: can be costly?