using the energy-level diagram on page 131 in the textbook, calculate the wavelength of the light emitted when the electron in a hydrogen atom falls from the n=5 shell to the n=3 shell. [1 eV= 1.6022 x 10^-19 J]

What best discribes the relationship between wavelength and frequency in a electromagnetic wave

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.

Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.