Which of the changes listed below would shift this reaction to the right?
4HCI(g) + O2(g)=2012 (g) + 2H,0(g)
A. Removal of O2
B. Increase of pressure
C. Decrease of pressure
D. Addition of Cl2

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

What is the temperature of one mole of helium gas at stp?

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have