If an atom has 4 protons and 2 electrons its charge will be:

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

Why does his teacher ask him to balance the equation by including the correct coefficient

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