Chemical Formulas

Front

What is the chemical formula for methane?

Back

CH₄

Tags

NGSS.MS-PS1-1

Front

How many elements are present in the amino acid with the formula C₅H₁₁NO₂S?

Back

5

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for water?

Back

H₂O

Tags

NGSS.MS-PS1-1

Front

How many hydrogen atoms are in the formula CH₃CH₂Br?

Back

5

Tags

NGSS.MS-PS1-1

Front

What does the subscript in a chemical formula represent?

Back

The number of atoms of the element in the molecule.

Tags

NGSS.MS-PS1-1

Front

What is the significance of the chemical formula in identifying a compound?

Back

It provides information about the types and numbers of atoms in the molecule.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for ethanol?

Back

C₂H₅OH

Front

How do you determine the number of different elements in a chemical formula?

Back

Count the unique elemental symbols in the formula.

Tags

NGSS.MS-PS1-1

Front

What is the chemical formula for ammonia?

Back

NH₃

Tags

NGSS.MS-PS1-1

Front

What is the difference between a molecular formula and an empirical formula?

Back

A molecular formula shows the actual number of atoms, while an empirical formula shows the simplest ratio of elements.