Your lab instructor gives you a red solid and tells you that it is a pure substance.Which of the following statements is true given this information?
A)The solid has a fixed composition by mass.
B)The solid is a compound.
C)The solid cannot be decomposed into simpler substances.
D)The solid cannot be melted.

Question

Quizplus · Accepted Answer

A pure substance has a fixed composition by mass, which distinguishes it from mixtures that can have variable compositions. The statement does not provide enough information to conclude whether the solid is a compound (B), cannot be decomposed into simpler substances (C), or cannot be melted (D).

Your Lab Instructor Gives You a Red Solid and Tells