Mole-mole stoichiometry examples

📚 Quick Study Guide

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• Balanced Chemical Equation: The foundation of stoichiometry. Ensures mass is conserved.
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• Mole Ratio: Obtained from the coefficients of the balanced equation. Represents the proportional relationship between reactants and products.
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• Stoichiometric Coefficients: Numbers in front of chemical formulas indicating the number of moles of each substance.
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• General Formula: Moles of desired substance = (Moles of given substance) x (Coefficient of desired substance / Coefficient of given substance)
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• Key Steps: Balance the equation, convert given amounts to moles, use the mole ratio, convert back to desired units if necessary.

Practice Quiz

1. What is the mole ratio of $O_2$ to $H_2O$ in the balanced equation: $2H_2 + O_2 \rightarrow 2H_2O$?
   1. 1:1
   2. 2:1
   3. 1:2
   4. 2:2
2. If 4 moles of $H_2$ react according to the equation $2H_2 + O_2 \rightarrow 2H_2O$, how many moles of $H_2O$ are produced?
   1. 2 moles
   2. 4 moles
   3. 6 moles
   4. 8 moles
3. Consider the reaction: $N_2 + 3H_2 \rightarrow 2NH_3$. If you have 6 moles of $H_2$, how many moles of $N_2$ are required for complete reaction?
   1. 1 mole
   2. 2 moles
   3. 3 moles
   4. 6 moles
4. For the reaction $CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$, if you start with 2 moles of $CH_4$, how many moles of $O_2$ are needed?
   1. 1 mole
   2. 2 moles
   3. 3 moles
   4. 4 moles
5. In the reaction $2CO + O_2 \rightarrow 2CO_2$, what is the mole ratio of $CO$ to $CO_2$?
   1. 1:1
   2. 1:2
   3. 2:1
   4. 2:2
6. Given the reaction $4NH_3 + 5O_2 \rightarrow 4NO + 6H_2O$, if you have 8 moles of $NH_3$, how many moles of $H_2O$ can be produced?
   1. 4 moles
   2. 6 moles
   3. 10 moles
   4. 12 moles
7. For the reaction $S + 3F_2 \rightarrow SF_6$, if you have 0.5 moles of $S$, how many moles of $F_2$ are required?
   1. 0.5 moles
   2. 1.0 mole
   3. 1.5 moles
   4. 2.0 moles