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Maurinko [17]
3 years ago
5

When 33.3 grams of propane (C​3​H​8​) undergoes combustion, what is the theoretical yield of water in grams? The molar mass of p

ropane is 44 g/mol and the molar mass of water is 18 g/mol. Input your answer without the units.
C3H8+ 5 O2 --> 3 CO2 + 4 H2O
Chemistry
2 answers:
stira [4]3 years ago
8 0

Answer:

54 g

Explanation:

We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.

M_r:        44                                   18

             C₃H₈ + 5O₂ ⟶ 3CO₂ + 4H₂O

Mass/g: 33.3

1. Calculate the <em>moles of C₃H₈ </em>

Moles C₃H₈ = 33.3 × 1/44

Moles C₃H₈ = 0.757 mol C₃H₈

===============

2. Calculate the <em>moles of H₂O  </em>

The molar ratio is 4 mol H₂O:1 mol C₃H₈.

Moles of NaCl = 0.757 × 4/1

Moles of NaCl = 3.03 mol H₂O

===============

3. Calculate the <em>mass of H₂O </em>

Mass of H₂O = 3.03 × 18

Mass of H₂O = 54 g

aev [14]3 years ago
3 0
C3H8+ 5 O2 --> 3 CO2 + 4 H2O
44 g. --------> 72 g
33.3 g. --------> x
x =  \frac{33.3 \times 72}{44} \\ x = 54.5 \: g
Answer: The theoretical yield of H2O is 54.5
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