Balance It: Mass Conservation Quiz

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Balance equations & learn stoichiometry.

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Dariya Makhmutova

Kazajstán

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Balance It: Mass Conservation Quiz


Froggy Jumps Balance It: Mass Conservation QuizVersión en línea Balance equations & learn stoichiometry. por Dariya Makhmutova 1 What does the Law of Conservation of Mass state? a Atoms are neither created nor destroyed in a chemical reaction. b Molecules rearrange with no atoms left. c Mass is converted to energy. 2 Which part must NOT be changed when balancing equations? a Subscripts in formulas b Coefficients c State symbols 3 What is the role of coefficients in a balanced equation? a Indicate reaction rate b Show how many molecules participate c Show color changes 4 Which symbol indicates an aqueous solution? a (s) b (aq) c (g) 5 In systematic balancing, which elements are often balanced first? a Elements that appear in only one reactant and one product b Oxygen first c Hydrogen first 6 Which elements are usually balanced last in a typical approach? a Metals b Nitrogen and sulfur c Oxygen and hydrogen 7 If a reaction is balanced by coefficients, what changes when you double a coefficient? a Molecular weight doubles b Subscripts in formulas change c The number of atoms involved in the reaction doubles 8 Which statement best describes a balanced equation? a Same mass on both sides b Same number of each type of atom on both sides c Same number of molecules on both sides 9 What is the end goal of balancing equations in stoichiometry? a Predict reaction color b Allow mass, mole, and gas volume calculations c Determine reaction temperature 10 What does (g) denote in a chemical formula? a Solid b Aqueous solution c Gas 11 If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for iodine be? bromine + potassium iodide → potassium bromide + iodine a 2I- b I2 c I 12 What are the missing coefficients for the skeleton equation below? AlCl3 + NaOH → Al(OH)3 + NaCl a 1,3, 1,3 b 3,1, 3,1 c 1,3, 3,3 13 What is the missing coefficient for (NH3)) the equation below? N2 + 3H2 → ___ NH3 a 2 b 1 c 3 14 Find the balanced and correct reaction? a 2AI + 6HCI → 2AICl3 + 3H2 b Al + 2HCI → AlCl + H2 c Al + HCl3 → AlCl3 + H 15 When the equation, Fe + Cl2 → FeCl3 is balanced, what is the coefficient for Cl2? a 3 b 2 c 6

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Balance It: Mass Conservation Quiz

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Balance It: Mass Conservation QuizVersión en línea

por Dariya Makhmutova

What does the Law of Conservation of Mass state?

Which part must NOT be changed when balancing equations?

What is the role of coefficients in a balanced equation?

Which symbol indicates an aqueous solution?

In systematic balancing, which elements are often balanced first?

Which elements are usually balanced last in a typical approach?

If a reaction is balanced by coefficients, what changes when you double a coefficient?

Which statement best describes a balanced equation?

What is the end goal of balancing equations in stoichiometry?

What does (g) denote in a chemical formula?

If you rewrite the following word equation as a balanced chemical equation, what will the coefficient and symbol for iodine be? bromine + potassium iodide → potassium bromide + iodine

What are the missing coefficients for the skeleton equation below? AlCl3 + NaOH → Al(OH)3 + NaCl

What is the missing coefficient for (NH3)) the equation below? N2 + 3H2 → ___ NH3

Find the balanced and correct reaction?

When the equation, Fe + Cl2 → FeCl3 is balanced, what is the coefficient for Cl2?