Fill in the blank In a physical model that shows the reaction of zinc metal and hydrochloric acid (hydrogen chloride),
different colors are needed to
represent the different types of atoms. This represents a
equation because there are
atoms of each element on the
reactants and products side of the equation. The scientific principle represented here is.

Zinc + Hydrochloric Acid - Zinc Chloride and Hydrogen Gas
Zn + 2HCI - ZnCl2 + H2

Word bank -
13
the same number of

The Law of Conservation of Mass

unbalanced

zero

a different number of

The Law of Conservation of Water

balanced

3; balanced; the same number of; The Law of Conservation of Mass

Explanation:

In a physical model that shows the reaction of zinc metal and hydrochloric acid (hydrogen chloride), 3 different colors are needed to represent the different types of atoms. This represents a balanced equation because there are the same number of atoms of each element on the reactants and products side of the equation. The scientific principle represented here is The Law of Conservation of Mass .

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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