In the following reaction: 3Si+2N 2 Si 3 N 4 the law of conservation of mass is shown because there a g of reactants and g of product.

What is the study of how matter and energy interact? a. biology b. physics c. planetary science d. chemistry

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?