- A 300g sample of CaCO3 was heated until 10 L of CO2 was collected at 50°C and 742 torr. What percentage of the CaCO, had
decomposed? (Atomic weights (g/mol): C=12, 0=16, Ca=40)
A. 6.84%
B. 9.10%
C. 12.3%
D. 15.8%

C.12.3%. you need to use pv=nRT (ideal gas law)

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".