Counting Atoms & Balancing Equations (SWS)

Front

What is the total number of atoms present in 5Na₃PO₄?

Back

40

Tags

NGSS.MS-PS1-1

Front

The red numbers in a chemical equation represent ________

Back

coefficients

Front

Balance the following equation: ___ Mg + ___ O₂ → ___ MgO

Back

2, 1, 2

Tags

NGSS.MS-PS1-5

Front

Is this balanced? 2HgO → 2Hg + O₂

Back

Yes

Tags

NGSS.MS-PS1-5

Front

How many atoms of Iron (Fe) are in 2Fe₂O₃?

Back

4

Tags

NGSS.MS-PS1-1

Front

What are subscripts in a chemical formula?

Back

Numbers that indicate the number of atoms of an element in a molecule.

Tags

NGSS.MS-PS1-1

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved.

Tags

NGSS.MS-PS1-5

Front

How do you determine the total number of atoms in a compound?

Back

Add the number of atoms of each element, multiplied by their coefficients.

Front

What does it mean for a chemical equation to be balanced?

Back

The number of atoms of each element is the same on both sides of the equation.

Tags

NGSS.MS-PS1-5

Front

What is the balanced equation for the combustion of propane (C₃H₈)?

Back

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

Tags

NGSS.MS-PS1-5