Calculate the mass of CO2 produced when 4.12 moles C2H2 reacts completely with oxygen. 2 C2H2 + 5 O2 → 4 CO2 + 2 H2O

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".