Coefficient

Which formula below could represent 7 molecules of ammonia?

Tags

NGSS.MS-PS1-1

H₂O
This number tells how many molecules are in a chemical equation.

• coefficient

• subscript

• compound

• element

Determine the coefficients to balance the chemical equation.

___Al + ___O₂--> ___Al₂O₃

• 4, 1, 2

• 4, 3, 4

• 3, 4, 1

• 4, 3, 2

Tags

NGSS.MS-PS1-5

What is a coefficient?

• The small number on the right of the chemical symbol.

• The large number in front of a chemical formula.

• The number in between the chemical symbols.

• The number behind a chemical formula.

Tags

NGSS.MS-PS1-5

Determine the coefficients to make the following equation balanced?

__N₂ + __O₂--> __NO

• 1, 1, 1

• 1, 1, 2

• 2, 2, 2

• 1, 2, 2

Tags

NGSS.MS-PS1-5

How many HCl molecules are needed to balance the equation? Mg + __HCl ---> MgCl2 + H2

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Determine the coefficients to balance the equation.

__Al +__HCl --> __H₂ +__AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Tags

NGSS.MS-PS1-5

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Which of the following best describes a coefficient in a chemical equation?

• A number that indicates the quantity of molecules or atoms involved in the reaction.

• A number that represents the charge of an ion.

• A number that shows the atomic mass of an element.

• A number that indicates the energy change in a reaction.

Tags

NGSS.MS-PS1-5

• 1, 5, 3, 4

• 1, 4, 3, 4

• 2, 7, 6, 8

• 1, 6, 3, 4

Tags

NGSS.MS-PS1-5