The relative atomic weight of a metal can be determined by converting it to its metal oxide. In one such determination 1.00 g of metal X was burnt in oxygen to form 1.40 g of its oxide,
XO. Using the know atomic weight for oxygen and these results, the atomic weight of X is
a. 1.00 g/mol
c. 40.0 g/mol
b. 16.0 g/mol
d. 80.0 g/mol

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explanation:

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".