Which substance is mainly composed of a subgroup of lipids? A. beef
B. butter
C. soybean
D. flour

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

The element that has the greatest electronegativity is

What is true for a substance that releases energy