Write the number in scientific nation form

Who is better, messi or cristiano, i need this for a chemistry class. asap

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

What information does a complete ionic equation give that the balanced equation doesn’t show?