1) What is an equilibrium reaction? pressure affect a gas-phase equilibrium reaction? 1) What is an equilibrium reaction?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

Idon’t know how to solve this question

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