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Consider the following reaction:

[tex]\[ CH_4 + 2 O_2 \rightarrow 2 H_2O + CO_2 \][/tex]

How many moles of water can be formed from 2.4 moles of [tex]\( CH_4 \)[/tex] and 6.5 moles of [tex]\( O_2 \)[/tex]?

Your Answer:
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Answer:
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Answer units:
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Sagot :

To determine how many moles of water ([tex]\(H_2O\)[/tex]) can be formed from 2.4 moles of methane ([tex]\(CH_4\)[/tex]) and 6.5 moles of oxygen ([tex]\(O_2\)[/tex]), we need to follow these steps:

1. Write the balanced chemical equation:
[tex]\[ CH_4 + 2O_2 \rightarrow 2H_2O + CO_2 \][/tex]

This indicates that 1 mole of [tex]\(CH_4\)[/tex] reacts with 2 moles of [tex]\(O_2\)[/tex] to produce 2 moles of [tex]\(H_2O\)[/tex].

2. Determine the moles of [tex]\(H_2O\)[/tex] each reactant can produce:
- For [tex]\(CH_4\)[/tex]:
[tex]\[ 1 \text{ mole of } CH_4 \text{ produces } 2 \text{ moles of } H_2O \][/tex]
So, for 2.4 moles of [tex]\(CH_4\)[/tex]:
[tex]\[ 2.4 \text{ moles } CH_4 \times \frac{2 \text{ moles } H_2O}{1 \text{ mole } CH_4} = 4.8 \text{ moles } H_2O \][/tex]

- For [tex]\(O_2\)[/tex]:
[tex]\[ 2 \text{ moles of } O_2 \text{ produce } 2 \text{ moles of } H_2O \][/tex]
Thus, for 6.5 moles of [tex]\(O_2\)[/tex]:
[tex]\[ 6.5 \text{ moles } O_2 \times \frac{2 \text{ moles } H_2O}{2 \text{ moles } O_2} = 6.5 \text{ moles } H_2O \][/tex]

3. Identify the limiting reactant:
The limiting reactant is the one that produces the lesser amount of product (in this case, [tex]\(H_2O\)[/tex]). Therefore, we compare the moles of [tex]\(H_2O\)[/tex] that can be produced by each reactant:
[tex]\[ \text{Moles of } H_2O \text{ from } CH_4: 4.8 \text{ moles } \][/tex]
[tex]\[ \text{Moles of } H_2O \text{ from } O_2: 6.5 \text{ moles } \][/tex]
Since 4.8 moles is the lesser amount, [tex]\(CH_4\)[/tex] is the limiting reactant.

4. Calculate the moles of [tex]\(H_2O\)[/tex] formed:
The number of moles of [tex]\(H_2O\)[/tex] formed is dictated by the limiting reactant, which is [tex]\(CH_4\)[/tex].

Therefore, the number of moles of [tex]\(H_2O\)[/tex] that can be formed is:
[tex]\[ \boxed{4.8 \text{ moles}} \][/tex]