Mole-to-Mole Mastery

Froggy Jumps

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Since the given and the unknown are both in moles, only the mole ratio from the balanced chemical equation is needed—no conversion to grams is required.

Created by

Juanita Corpuz

Philippines

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#	Player	Accuracy	time
1	LanceR July 5, 2026	% 100	00:57
2	Juanita Corpuz June 30, 2026	% 100	01:25
3	LanceM June 30, 2026	% 90	00:53
4	eladiogwapo June 30, 2026	% 90	01:19
5	Manuel June 30, 2026	% 90	01:23
6	XixiannLMFAO June 30, 2026	% 80	00:58
7	Shemaiah June 30, 2026	% 80	02:15
8	Justine June 30, 2026	% 80	03:10
9	Chari June 30, 2026	% 80	03:49
10	Mary_Mae June 30, 2026	% 60	02:09

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Mole-to-Mole Mastery


Froggy Jumps Mole-to-Mole MasteryOnline version Since the given and the unknown are both in moles, only the mole ratio from the balanced chemical equation is needed—no conversion to grams is required. by Juanita Corpuz 1 In the reaction 2 H2 + O2 -> 2 H2O, how many moles of H2 are needed to react with 3 moles of O2? a 3 b 4 c 6 2 In a balanced chemical equation, the coefficients represent the fundamental ratio of which of the following? a Molecules, formula units, or moles b Only the number of atoms within a single molecule c Grams, kilograms, or total mass 3 Why is standard convention in chemistry to use the lowest whole-number ratio for coefficients? a To ensure that the mass of reactants always equals the mass of products. b Because larger numbers alter the chemical bonds formed in the products. c To provide the simplest baseline proportion for easier calculation and scaling. 4 If a balanced reaction has a 1:2 ratio between reactant A and reactant B, this implies that: a There is twice as much volume of A needed compared to B. b For every 1 mole of A consumed, 2 moles of B are required. c Reactant B weighs exactly twice as much as reactant A. 5 Which statement best explains why a balanced equation's coefficients do not represent direct mass ratios? a Molar relationships are random and cannot be consistently calculated. b Different molecules have different molar masses, meaning equal moles have unequal masses. c Mass is lost during chemical reactions when bonds break. 6 For 2 H2 + O2 -> 2 H2O, how many moles H2O are formed per 1 mole O2 consumed? a 3 b 1 c 2 7 If you need to scale up a reaction to produce 10 times the amount of product, what must you do to the moles of all participating reactants? a Multiply the moles of each reactant by 10 to maintain the structural proportion. b Add 10 moles to each reactant regardless of their starting coefficients. c Keep the reactant moles the same and change the coefficients of the equation. 8 What is the specific term given to the study of numerical relationships between reactants and products in a balanced chemical reaction? a Chemical Kinetics b Thermodynamics c Stoichiometry 9 An equation remains "perfectly balanced" even if coefficients are changed, provided that which characteristic is maintained? a The total number of molecules on both sides of the equation b The total volume of gases on both sides of the arrow c The structural proportion (ratio) between the coefficients 10 If you mix reactants in a ratio that perfectly matches the coefficients of a balanced chemical equation, which of the following is true? a The reaction will turn into an equilibrium that cannot produce any product. b Both reactants will be completely consumed at the exact same time with nothing left over. c The reaction will stop halfway because there is no limiting reactant to drive it.

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Mole-to-Mole Mastery

Froggy Jumps

About this activity

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Download the paper version to play

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Mole-to-Mole MasteryOnline version

by Juanita Corpuz

In the reaction 2 H2 + O2 -> 2 H2O, how many moles of H2 are needed to react with 3 moles of O2?

In a balanced chemical equation, the coefficients represent the fundamental ratio of which of the following?

Why is standard convention in chemistry to use the lowest whole-number ratio for coefficients?

If a balanced reaction has a 1:2 ratio between reactant A and reactant B, this implies that:

Which statement best explains why a balanced equation's coefficients do not represent direct mass ratios?

For 2 H2 + O2 -> 2 H2O, how many moles H2O are formed per 1 mole O2 consumed?

If you need to scale up a reaction to produce 10 times the amount of product, what must you do to the moles of all participating reactants?

What is the specific term given to the study of numerical relationships between reactants and products in a balanced chemical reaction?

An equation remains "perfectly balanced" even if coefficients are changed, provided that which characteristic is maintained?

If you mix reactants in a ratio that perfectly matches the coefficients of a balanced chemical equation, which of the following is true?