Elements, Compounds, and Chemical Formulas

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numbers to indicate the quantity of each element.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different elements are chemically bonded together.

Front

How many atoms are in the chemical formula C6H12O6?

Back

There are 24 atoms in total: 6 carbon (C) atoms, 12 hydrogen (H) atoms, and 6 oxygen (O) atoms.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element that are present in the molecule.

Front

What is the coefficient in a chemical formula?

Back

The coefficient indicates the number of molecules of the compound present.

Front

What is sodium sulfate's chemical formula?

Back

Na2SO4.

Front

How many sulfur atoms are in sodium sulfate (Na2SO4)?

Back

There is 1 sulfur atom in sodium sulfate.

Front

What is the chemical formula for ethanol?

Back

C2H5OH.

Front

How many hydrogen atoms are in ethanol (C2H5OH)?

Back

There are 6 hydrogen atoms in ethanol.

Front

What is the role of oxygen in compounds?

Back

Oxygen often acts as a bonding element in compounds, typically forming bonds with other elements to create various substances.