Please help!! "Explain how you know Alika's diagram is done correctly or not"

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

Draw the skeletal structures of two different molecules that are each made of 5 carbon atoms and 12 hydrogen atoms.

Each pair of clay balls represents to planetesimals if each plane test molluscum pound of the same material and is separated by the same distance which pair experiences the greatest gravitational attraction