The absorption of a drug (M) is described by: 2M -- A + B
The reaction has a rate constant of 5.20x10-3 L / µgh and is second order
with respect to M. How long will it take to start its therapeutic effect, if you start from a
initial concentration of 5000µg / L and its concentration in blood is required to reach
at sr 780 µg / L (in minutes)

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.