Balancing Equations Practice

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has equal numbers of each type of atom on both sides of the equation, following the law of conservation of mass.

Tags

NGSS.MS-PS1-5

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

How do you determine the coefficient of water (H2O) in the reaction SnO2 + H2 → Sn + H2O?

Back

By balancing the equation, you find that the coefficient of H2O is 1.

Tags

NGSS.HS-PS1-7

Front

What is the process of balancing a chemical equation?

Back

The process involves adjusting the coefficients of the reactants and products to ensure that the number of atoms for each element is the same on both sides.

Tags

NGSS.MS-PS1-5

Front

In the equation KOH + H3PO4 → K3PO4 + H2O, how many KOH molecules are needed to balance it?

Back

3 KOH molecules are needed to balance the equation.

Tags

NGSS.MS-PS1-5

Front

What is the balanced form of the equation Fe + H2SO4 → Fe2(SO4)3 + H2?

Back

The balanced equation is 2 Fe + 6 H2SO4 → Fe2(SO4)3 + 6 H2.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the significance of the subscripts in a chemical formula?

Back

Subscripts indicate the number of atoms of each element in a molecule.

Tags

NGSS.MS-PS1-1

Front

How do you balance the equation BF3 + Li2SO3 → B2(SO3)3 + LiF?

Back

The balanced equation is 2 BF3 + 3 Li2SO3 → 1 B2(SO3)3 + 6 LiF.

Tags

NGSS.MS-PS1-5

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the coefficient of H2SO4 in the balanced equation Fe + H2SO4 → Fe2(SO4)3 + H2?

Back

The coefficient of H2SO4 is 3.

Tags

NGSS.HS-PS1-7