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Which medications listed below are associated with the highest incidence of QT prolongation among their classes?

What is the formula for sodium sulfate?

What is the mass of 3.26 x 1023 molecules of aluminum oxide (Al2O3)?

A student determined the mass of a sample in a flask by first weighing the empty flask (98.724 g), and then measuring the mass of the flask containing the sample (104.21 g). How many significant figures should be reported for the mass of the sample?

You are promised a lump sum payment of  $`FV` exactly `n` years from now. The annual nominal interest rate is `i`%, compounded semi-annually (twice per year). What is the amount you would need to invest today to have this same future value? **Remember, because the compounding is semi-annual, both the interest rate per period and the total number of periods must be adjusted accordingly. Enter your answer with 2 decimal places and NO special characters. Do not submit a negative value; submit your answer as a positive value.

Ethanol has a density of 0.789 g/cm3. What is the mass of 500 mL of ethanol?

2.3357 x 10-7   –   6.92 x 10-7   +   3.0223 x 10-8 =

You will see an assignment in the modules titled “Scratch work from Exam 1.” Upload a pdf of your scratch work from this exam. You have an extra day beyond the due date of this exam to get it done.  For things like this, I use a free pdf app on my phone or tablet. The one I use is called “Fast Scanner,” but there are also other apps. Alternatively, you could scan you scratch work with a scanner/copier. DO NOT SUBMIT PICTURES. Pdf uploads only please. 

21. A 35-year-old female presents to the emergency department with severe abdominal pain. Which of the following characteristics is most consistent with the patient experiencing visceral pain? 

Express the product of 2.2 mm and 5.00 mm using the correct number of significant digits (according to rules).