Chemical Formulas

A coefficient is a regular size number in front of the chemical formula that tells us how many molecules there are of that compound.

• True

• False

A subscript is the little number to the right of an element symbol that tells you how many molecules there are of that compound.

• True

• False

The formula below represents the most common carbohydrate known as glucose (or sugar). Which information can be determined from the chemical formula?

C₆H₁₂O₆

• The structural arrangement of the atoms in a glucose molecule

• The color of a glucose molecule

• The size of a glucose molecule

• The number of atoms of each element in a glucose molecule

Tags

NGSS.MS-PS1-1

Which of the following are considered to be "Elements"? Select 3 correct answers.

• H

• NaCl

• O₂

• Zn

• CH₄

Which of the following are considered to be "Compounds"? Select 3 correct answers.

• CH₄

• Pb

• ZnO

• Zn₄

• C₆H₁₂O₆

Tags

NGSS.MS-PS1-1

The ________________ which are numbers that are found on the lower RIGHT hand side of each element symbol. This tells you the number of ________________ of this element in the molecule.

• Atomic number, electrons

• Subscript, atoms

• Coefficient, atoms

• Atomic number, protons

Tags

NGSS.MS-PS1-1

If an element symbol has no subscript next to it, then this indicates that there is only ________________ atom of this element in the molecule.

• Zero

• Two

• One

• Three

Tags

NGSS.MS-PS1-1

The ________________ which is a number that is found on the LEFT-hand side of the WHOLE chemical formula or compound . You have to ___________ this number to the rest of the element subscripts to get the accurate number of atoms in a given compound.

• Subscript, multiply

• Subscript, divide

• Coefficient, divide

• Coefficient, multiply

How many elements are in C₆H₁₂O_6?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Which is the correct formula for:

3 Hydrogen (H)

1 Sulfur (S)

4 Oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1