Can solid FeBr2 react with Cl2 gas to produce solid FeCl2 and Br2 gas? Why or why not?

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

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer