Stoichiometry Quest

Froggy Jumps

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Balance and ratios challenge

Sameh Haba

Saudi Arabia

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Stoichiometry Quest


Froggy Jumps Stoichiometry QuestVersion en ligne Balance and ratios challenge par 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