The following chemicals were combined: Zinc + Hydrochloric Acid → Zinc Chloride and Hydrogen Gas Zn + 2HCl → ZnCl2 + H2

Explain why it is necessary to place a "2" in front of HCl in the reactants in the chemical equation. Use evidence and scientific reasoning to support your answer.

The length of a vector arrow represents its magnitude and the point represents its direction true or false apex

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car