If there is 5 atoms of oxygen in the reactant, how many oxygen atoms must be in the product

Which piece of equipment would me most useful for measuring the volume of some water? a. pan balance b. graduated cylinder c. tweezers d. flask quick

What are transitions between a liquid and a solid called? identify which way they are transitioning

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