A conversion factor is a fraction in which the numerator is equal to the denominator. a. True
b. False

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Calcium chloride +gold(1) oxide—>

An observation that requires measurement is called quantitative observable or qualitative