How can you make an observation?

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 biosphere of the earth is made up of what compound? organic or inorganic?

The molar mass of cu is 63.55 g/mol. the number of grams of cu produced in this reaction is