What is the formula for lead carbonate? Please show me the work for how to do it, along with charts or whatever it is you do to solve it.
Also please show the answer

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

Describe the forces both attractive and repulsive that occur as two atoms move closer together.

Is 343 in the sequence -5, -2, 1, 4, 7