The combustion of propane occurs through the following chemical reaction:

[tex]\[C_3H_8(g) + 5O_2(g) \longrightarrow 3CO_2(g) + 4H_2O(g)\][/tex]

How many grams of [tex]\(\text{CO}_2\)[/tex] can be made by reacting 1.136 grams of oxygen gas?

[tex]\(\square\)[/tex]



Answer :

Sure, let's solve this problem step-by-step.

1. Write the given chemical reaction:

[tex]\[ C_3H_8(g) + 5 O_2(g) \rightarrow 3 CO_2(g) + 4 H_2O(g) \][/tex]

2. Molar masses:

- Molar mass of [tex]\(O_2\)[/tex] (oxygen gas): [tex]\(32 \, \text{g/mol}\)[/tex]
- Molar mass of [tex]\(CO_2\)[/tex] (carbon dioxide): [tex]\(44 \, \text{g/mol}\)[/tex]

3. Determine the given mass of [tex]\(O_2\)[/tex]:

[tex]\(1.136 \, \text{g}\)[/tex]

4. Calculate the moles of [tex]\(O_2\)[/tex]:

The moles of a substance can be found using the formula:
[tex]\[ \text{Moles} = \frac{\text{Given mass}}{\text{Molar mass}} \][/tex]
So, the moles of [tex]\(O_2\)[/tex] are:
[tex]\[ \text{Moles of } O_2 = \frac{1.136 \, \text{g}}{32 \, \text{g/mol}} = 0.0355 \, \text{mol} \][/tex]

5. Use the stoichiometry of the reaction:

According to the balanced chemical equation, 5 moles of [tex]\(O_2\)[/tex] produce 3 moles of [tex]\(CO_2\)[/tex].
Therefore:
[tex]\[ \text{Moles of } CO_2 = \left( \frac{3}{5} \right) \times 0.0355 \, \text{mol} = 0.0213 \, \text{mol} \][/tex]

6. Convert moles of [tex]\(CO_2\)[/tex] to grams:

Use the formula:
[tex]\[ \text{Mass} = \text{Moles} \times \text{Molar mass} \][/tex]
So, the mass of [tex]\(CO_2\)[/tex] is:
[tex]\[ \text{Mass of } CO_2 = 0.0213 \, \text{mol} \times 44 \, \text{g/mol} = 0.9372 \, \text{g} \][/tex]

Therefore, by reacting 1.136 grams of oxygen gas, you can produce approximately 0.9372 grams of carbon dioxide.