In the compound, 20 g of calcium are combined with 8 g of oxygen. Determine its molecular formula. Anyone help? ​

Which of the following are correct values for the ideal gas laws constant r

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?

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.