Please help and try to explain if you can!

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

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.