List at least 3 things you currently know to be true about energy

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

What does the mass of 0.7891 mol of ferric oxide (fe2o3)