Chem Balance Challenge

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Test balancing chemical equations and concepts.

Creada por

Aniya Vang

Estados Unidos

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Froggy Jumps Chem Balance ChallengeVersión en línea Test balancing chemical equations and concepts. por Aniya Vang 1 What do coefficients in a chemical equation represent? a Number of molecules b Number of bonds c Number of atoms 2 What does a subscript indicate? a Number of molecules b Number of atoms inside a molecule c Number of bonds 3 In 2H2 + O2 → 2H2O, which are the reactants? a H2O and H2 b H2O only c H2 and O2 4 What does the arrow in a chemical equation show? a Temperature change b Direction of reaction c Reaction speed 5 What must be conserved in a chemical reaction? a Total energy b The number of each element c Volume of reactants 6 When balancing, should you change coefficients or subscripts? a Change coefficients only b Change subscripts only c Change both freely 7 Why are fractions sometimes used in balancing? a To speed up reactions b To change elements c To clear fractions and balance 8 In CH4 + O2 → CO2 + H2O, what is the coefficient of O2 in the balanced form (CH4 + 2 O2 → CO2 + 2 H2O)? a 2 b 3 c 1 9 Why might two coefficients need to change together? a Because of polyatomic groups b Because of catalysts c Because of temperature change 10 What fraction is commonly used first when balancing diatomic molecules? a 2 b 1 c 1/2

Froggy Jumps

Chem Balance ChallengeVersión en línea

Test balancing chemical equations and concepts.

por Aniya Vang

What do coefficients in a chemical equation represent?

Number of molecules

Number of bonds

Number of atoms

What does a subscript indicate?

Number of molecules

Number of atoms inside a molecule

Number of bonds

In 2H2 + O2 → 2H2O, which are the reactants?

H2O and H2

H2O only

H2 and O2

What does the arrow in a chemical equation show?

Temperature change

Direction of reaction

Reaction speed

What must be conserved in a chemical reaction?

Total energy

The number of each element

Volume of reactants

When balancing, should you change coefficients or subscripts?

Change coefficients only

Change subscripts only

Change both freely

Why are fractions sometimes used in balancing?

To speed up reactions

To change elements

To clear fractions and balance

In CH4 + O2 → CO2 + H2O, what is the coefficient of O2 in the balanced form (CH4 + 2 O2 → CO2 + 2 H2O)?

Why might two coefficients need to change together?

Because of polyatomic groups

Because of catalysts

Because of temperature change

What fraction is commonly used first when balancing diatomic molecules?

1/2

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Chem Balance Challenge

Froggy Jumps

Sobre esta actividad

Creada por

Descarga la versión para jugar en papel

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Froggy Jumps

Chem Balance ChallengeVersión en línea

por Aniya Vang

What do coefficients in a chemical equation represent?

What does a subscript indicate?

In 2H2 + O2 → 2H2O, which are the reactants?

What does the arrow in a chemical equation show?

What must be conserved in a chemical reaction?

When balancing, should you change coefficients or subscripts?

Why are fractions sometimes used in balancing?

In CH4 + O2 → CO2 + H2O, what is the coefficient of O2 in the balanced form (CH4 + 2 O2 → CO2 + 2 H2O)?

Why might two coefficients need to change together?

What fraction is commonly used first when balancing diatomic molecules?

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