Which of the following best defines over-the-counter medications?
a. medications that require a written order from a doctor
b. drugs that can be purchased at a store without a prescription
c. drugs that can be taken for mind-altering effects that have no medical purpose
d. substances that cause a change in a person's physical or psychological state

What’s the percent by mass of carbon in c10h14n2

If 3 moles of a compound use 24 j of energy in a reaction, what is the a hreaction in j/mol?

The table lists the lattice energies of some compounds.compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf.the lattice energy increases as the cations get larger, as shown by lif and licl.the lattice energy decreases as cations get smaller, as shown by nacl and naf.the lattice energy decreases as the cations get smaller, as shown by naf and kf.