Classify and Balance Equations

When I want to balance a chemical equation, this is the only number that I can change.

• Subscript

• Coefficient

• Elemental Symbol

• Yields

The subscript tells you how many of what there are in a chemical reaction?

• atoms of that element

• molecules of that compound

• number of reactions

• They don't tell you anything.

A coefficient tells you what about the chemical reaction?

• Numbers of atoms in that element

• Numbers of molecules for that compound.

• How many reactions there are.

• They don't tell you anything.

Tags

NGSS.MS-PS1-1

The big/regular sized numbers in a chemical formula:

(the RED numbers)

• Subscripts

• Coefficients

• Numbers

• Molecules

The numbers placed in ​ (a)   of formulas to balance equations are called ​ (b)   , and they multiply all the atoms in a ​ (c)   . Thus, the symbol “2NaHCO₃” indicates ​ (d)   units of sodium bicarbonate, which contain 2 Na atoms, 2 H atoms, 2 C atoms, and 6 O atoms

(2 X 3= 6, the coefficient times the subscript for O).

• front

• coefficients

• two

• formula

Which of the following models best demonstrates a balanced chemical equation?

• F

• G

• H

• J

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many oxygen on the left side.

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many hydrogen on the left side.

• No, there are too many oxygen on the left side.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many copper on the left side.

• No, there are too many oxygen on the left side.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this equation balanced?

• Yes, everything appears the same amount on each side.

• No, there are too many hydrogen on the left side.

• No, there are too many oxygen on the left side.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5