Stoichiometry Quest

Froggy Jumps

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About this activity

Balance and ratios challenge

Created by

Sameh Haba

Saudi Arabia

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Froggy Jumps Stoichiometry QuestOnline version Balance and ratios challenge by Sameh Haba 1 What does a balanced chemical equation primarily reflect? a Conservation of mass b Electronic changes c Color changes in the mixture 2 In burning charcoal, which is conserved during the reaction? a Mass decreases with heat b Total mass before equals total mass after c Volume changes but mass stays 3 In a balanced equation, what do coefficients represent? a Mole ratios of reactants and products b Total mass of reactants c Rates of reaction 4 For the reaction N2 + 3 H2 -> 2 NH3, how many moles of NH3 from 1 mole N2? a 2 moles b 1 mole c 3 moles 5 In the Haber process, if you have 1 mole N2 and excess H2, how many moles NH3 form per mole N2? a 2 moles NH3 b 3 moles NH3 c 1 mole NH3 6 If 1 mole NH3 has a molar mass of 17 g, what mass of NH3 from 2 moles is produced? a 34 g b 51 g c 17 g 7 Law of conservation of mass states that mass in a closed system is: a Increases with time b Constant before and after the reaction c Decreases as gas escapes 8 In charcoal combustion, what are the typical products? a N2 and H2 b CO and O2 c CO2 and H2O 9 Balancing a combustion equation ensures mass is: a Equal on both sides b Lower on reactants side c Higher on products side 10 If 5 CH4 molecules burn completely, how many CO2 molecules are formed? a 5 CO2 molecules b 15 CO2 c 10 CO2

Froggy Jumps

Stoichiometry QuestOnline version

Balance and ratios challenge

by Sameh Haba

What does a balanced chemical equation primarily reflect?

Conservation of mass

Electronic changes

Color changes in the mixture

In burning charcoal, which is conserved during the reaction?

Mass decreases with heat

Total mass before equals total mass after

Volume changes but mass stays

In a balanced equation, what do coefficients represent?

Mole ratios of reactants and products

Total mass of reactants

Rates of reaction

For the reaction N2 + 3 H2 -> 2 NH3, how many moles of NH3 from 1 mole N2?

2 moles

1 mole

3 moles

In the Haber process, if you have 1 mole N2 and excess H2, how many moles NH3 form per mole N2?

2 moles NH3

3 moles NH3

1 mole NH3

If 1 mole NH3 has a molar mass of 17 g, what mass of NH3 from 2 moles is produced?

34 g

51 g

17 g

Law of conservation of mass states that mass in a closed system is:

Increases with time

Constant before and after the reaction

Decreases as gas escapes

In charcoal combustion, what are the typical products?

N2 and H2

CO and O2

CO2 and H2O

Balancing a combustion equation ensures mass is:

Equal on both sides

Lower on reactants side

Higher on products side

If 5 CH4 molecules burn completely, how many CO2 molecules are formed?

5 CO2 molecules

15 CO2

10 CO2

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Stoichiometry Quest

Froggy Jumps

About this activity

Created by

Download the paper version to play

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Stoichiometry QuestOnline version

by Sameh Haba

What does a balanced chemical equation primarily reflect?

In burning charcoal, which is conserved during the reaction?

In a balanced equation, what do coefficients represent?

For the reaction N2 + 3 H2 -> 2 NH3, how many moles of NH3 from 1 mole N2?

In the Haber process, if you have 1 mole N2 and excess H2, how many moles NH3 form per mole N2?

If 1 mole NH3 has a molar mass of 17 g, what mass of NH3 from 2 moles is produced?

Law of conservation of mass states that mass in a closed system is:

In charcoal combustion, what are the typical products?

Balancing a combustion equation ensures mass is:

If 5 CH4 molecules burn completely, how many CO2 molecules are formed?

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