Part of a phospholipid molecule can mix with water, but the other part cannot. what do you think that is mean:  the molecule is hydrophilic or hydrophobic ? Give Reason to your answer​

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

When balancing a chemical equation:

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp