Four models for hypothetical chemical reactions are shown here. Joined circles represent molecules. Which of the models represer
Conservation of Matter? Select ALL that apply.
A Model A
B. Model B
C. Model C
D. Model D
E. All of the models follow the Law of Conservation of Matte

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

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

What is the mass of phosphorous in a 51-kg person