(i need this answered quickly! i'm taking a quiz! )

a beaker is best used for measuring

a. the precise mass of a solid
b. the precise volume of a liquid
c. the approximate mass of a solid
d. the approximate volume of a liquid

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