What are the contributions of pauli exclusion principle in electronic configuration

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

The primary products of complete combustion of fossil fuels are a. carbon dioxide and water b. methane and water c. carbon monoxide and water d. carbon dioxide and carbon monoxide

The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?