Calculate the empirical formulas of the following polymers: a.) PVC; 38.44% C, 4.84% H, 56.73% Cl
b.) Lucite; 59.98% C, 8.05% H, 31.96% O
c.) polyethylene; 85.63% C, 14.37% H
d.) polystyrene; 92.26% C, 7.74% H
e.) Orlon; 67.90% C, 5.70% H, 26.40% N

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.

Mr. rose asked his student to draw a quadrilateral with four unequal sides. an example of this kind of quadrilateral