Front

What are coefficients in a chemical equation?

Back

Coefficients are the numbers placed before the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

Front

What is the principle of conservation of mass?

Back

The principle of conservation of mass states that in a chemical reaction, the mass of the reactants is equal to the mass of the products.

Front

How do you balance a chemical equation?

Back

To balance a chemical equation, adjust the coefficients of the reactants and products to ensure that the number of atoms of each element is the same on both sides of the equation.

Front

What does it mean if a chemical equation is already balanced?

Back

A chemical equation is already balanced if the number of atoms of each element is the same on both sides of the equation without needing to adjust any coefficients.

Front

What is a skeleton equation?

Back

A skeleton equation is a chemical equation that shows the reactants and products but does not indicate the relative amounts of each substance.

Front

What is the balanced equation for the reaction of nitrogen and hydrogen to form ammonia?

Back

The balanced equation is: N₂ + 3H₂ → 2NH₃.

Front

What are the coefficients that balance the equation: Sn + HF → SnF₂ + H₂?

Back

The coefficients are: 1, 2, 1, 1.

Front

What is the balanced equation for the reaction of sodium and chlorine to form sodium chloride?

Back

The balanced equation is: 2Na + Cl₂ → 2NaCl.

Front

What is the balanced equation for the reaction of barium sulfide and platinum(II) fluoride?

Back

The balanced equation is: BaS + PtF₂ → BaF₂ + PtS.

Front

What does it mean to balance a chemical reaction?

Back

Balancing a chemical reaction means ensuring that the number of atoms of each element is the same on both sides of the equation.