Apentix/AP Chemistry/Unit 3: Intermolecular Forces and Properties/Question
AP Chemistrymediummcq1 pt

Mercury is poured into two flasks so that flask 2 holds exactly half the volume held by flask 1. Which statement correctly compares the two mercury samples?

A.They have identical densities, though flask 2 holds half the mass of flask 1
B.Flask 2 has half the density because it holds half as much matter
C.Flask 2 has twice the density because its atoms are packed into less space
D.The densities differ slightly because each flask now contains a different liquid

Explanation

Core Concept

Density is an intensive property: mass divided by volume stays constant regardless of sample size. Cutting the volume in half cuts the mass in half in the same proportion, so the quotient remains about 13.6 g/mL for mercury at room temperature. Mass and volume are extensive properties that scale with amount, while density reflects only the substance itself.

Correct Answer

AThey have identical densities, though flask 2 holds half the mass of flask 1

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