Since the speed of light, “c”, is 0.3% slower in air than it is in outer space, how does that affect the observed wavelengths?

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

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.

How is the way a mixture is combined different from how a compound is combined?