ERS Consider the reaction pathway graph below.
P+QR → Q+PR
Energy
Q+PR
- 111.4+
Heat Input
P+QR
-988.2+
Reaction Progression
Which kind of reaction does this graph represent?

What does a particular point on a line of a phase diagram represent? o a. the maximum temperature a substance can exist at without bonds breaking b. the pressure created by the kinetic energy of molecules at a particular temperature c. the melting point or boiling point of a substance at a specific pressure d. the conditions in which temperature and pressure have equal effects on a substance

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 formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder