Which of the following describes the relative age of someone or something?
A. Kaitlyn is younger than Dillon.
B. Dillon is 13 years old
C. The trilobite is an index fossil.
D. The trilobite appeared 521 million years ago.

Seawater contains approximately 3.5%nacl by mass and has a density of 1.02 g/ml. what volume of seawater contains 7.5 g of sodium?

What happens to the atomic radius when an elctron is lost

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