Chemistry Reactions Challenge

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Balanced reactions & types

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Chemistry Reactions Challenge


Froggy Jumps Chemistry Reactions ChallengeVersión en línea Balanced reactions & types por Issraa 2 What is the main idea of a chemical equation? a It measures the speed of the reaction. b It lists only the elements present. c It shows reactants turning into products using symbols and an arrow. 3 In H2 + O2 → H2O, what are the reactants? a H2O only b H2 and O2 c H2O and O2 4 What is the product in the equation 2H2 + O2 → 2H2O? a H2 b H2O c O2 5 What does the Law of Conservation of Mass state? a Mass before equals mass after; atoms are rearranged, not created or destroyed. b Mass is destroyed when bonds form. c Mass increases during a reaction. 6 Which type of reaction joins two or more substances into one product? a Decomposition b Synthesis c Replacement 7 Which type breaks a compound into two or more substances? a Replacement b Decomposition c Synthesis 8 Which pattern represents a replacement reaction? a AB → A + B b A + B → AB c A + BC → AC + B 9 Balance the equation: H2 + O2 → H2O. What should the coefficients be? a H2 + O2 → H2O2 b H2 + O2 → H2O c 2H2 + O2 → 2H2O 10 What is a coefficient in a chemical equation? a The arrow in the equation b A subscript in a formula c A number in front of a formula indicating how many molecules 11 In 4Fe + 3O2 → 2Fe2O3, which element is O2 combining with? a Hydrogen (H) b Iron (Fe) c Calcium (Ca) 12 Which is an example of a synthesis reaction? a Zn + 2HCl → ZnCl2 + H2 b CaCO3 → CaO + CO2 c 2Mg + O2 → 2MgO 13 Which is an example of a decomposition reaction? a N2 + 3H2 → 2NH3 b 2Mg + O2 → 2MgO c CaCO3 → CaO + CO2 14 What is the reactant side called in a chemical equation? a Left side b Right side c Arrow 15 What is the product in the reaction Zn + 2HCl → ZnCl2 + H2? a Zn and HCl b ZnCl2 only c ZnCl2 and H2 16 What real-world example illustrates a decomposition reaction? a Combustion of methane b Neutralization of an acid with base c Heating CaCO3 to CaO + CO2 17 Which statement correctly describes a balanced equation? a The number of each type of atom is the same on both sides. b Only the reactants are counted. c Only the products are counted. 18 In the equation 2H2O2 → 2H2O + O2, what type is it? a Replacement b Synthesis c Decomposition 19 What does the subscript in a chemical formula indicate? a The number of atoms per molecule b The number of molecules c The total mass 20 Which accompanies a balanced equation as the way atoms are conserved? a New atoms are created b Atoms disappear c Atoms are rearranged, not created or destroyed

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Chemistry Reactions Challenge

Froggy Jumps

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Chemistry Reactions ChallengeVersión en línea

por Issraa

What is the main idea of a chemical equation?

In H2 + O2 → H2O, what are the reactants?

What is the product in the equation 2H2 + O2 → 2H2O?

What does the Law of Conservation of Mass state?

Which type of reaction joins two or more substances into one product?

Which type breaks a compound into two or more substances?

Which pattern represents a replacement reaction?

Balance the equation: H2 + O2 → H2O. What should the coefficients be?

What is a coefficient in a chemical equation?

In 4Fe + 3O2 → 2Fe2O3, which element is O2 combining with?

Which is an example of a synthesis reaction?

Which is an example of a decomposition reaction?

What is the reactant side called in a chemical equation?

What is the product in the reaction Zn + 2HCl → ZnCl2 + H2?

What real-world example illustrates a decomposition reaction?

Which statement correctly describes a balanced equation?

In the equation 2H2O2 → 2H2O + O2, what type is it?

What does the subscript in a chemical formula indicate?

Which accompanies a balanced equation as the way atoms are conserved?