Question

1. the polypropylene cubes have a density of 0.946 grams per milliliter. identify the true statement(s). select all that apply. a the cube sinks in methanol because methanols density is greater than the cubes density. b the cube floats on ethylene glycol because the cubes density is greater than ethylene glycols density. c the cube sinks in methanol because methanols density is less than the cubes density. d the cube floats on water because the waters density is greater than the cubes density. 2) which liquid(s) could be used for displacement? select all that apply.

Explanation:

Step1: Recall density - float/sink rule

An object sinks in a liquid if its density is greater than the liquid's density and floats if its density is less than the liquid's density. The density of polypropylene cube is 0.946 g/mL. The density of water is approximately 1 g/mL, the density of methanol is approximately 0.79 g/mL, and the density of ethylene - glycol is approximately 1.11 g/mL.

Step2: Analyze each option

• Option A: Methanol has a density (0.79 g/mL) less than the polypropylene cube (0.946 g/mL), so the cube sinks in methanol.
• Option B: Ethylene - glycol has a density (1.11 g/mL) greater than the polypropylene cube (0.946 g/mL), so the cube floats on ethylene - glycol.
• Option C: Since methanol's density is less than the cube's, the cube sinks, not floats.
• Option D: Since water's density (1 g/mL) is greater than the cube's (0.946 g/mL), the cube floats on water.

Answer:

A. The cube sinks in methanol because methanol's density is less than the cube's density.
B. The cube floats on ethylene glycol because the cube's density is less than ethylene glycol's density.
D. The cube floats on water because the water's density is greater than the cube's density.