Answer:
749 grams COâ‚‚
Explanation:
To find the amount of carbon dioxide produced, you need to (1) convert grams C₃H₈ to moles C₃H₈ (via molar mass from periodic table), then (2) convert moles C₃H₈ to moles CO₂ (via mole-to-mole ratio via reaction coefficients), and then (3) convert moles CO₂ to grams CO₂ (via molar mass from periodic table). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The desired unit should be in the numerator. The final answer should have 3 significant figures because the given value (250. grams) has 3 sig figs.
Molar Mass (C₃H₈): 3(12.01 g/mol) + 8(1.008 g/mol)
Molar Mass (C₃H₈): 44.094 g/mol
1 C₃H₈ + 5 O₂ ---> 3 CO₂ + 4 H₂O
Molar Mass (COâ‚‚): 12.01 g/mol + 2(16.00 g/mol)
Molar Mass (COâ‚‚): 44.01 g/mol
250. g C₃H₈     1 mole C₃H₈      3 moles CO₂        44.01 g
------------------  x  ----------------------  x  ----------------------  x  --------------------  =
                44.094 g        1 mole C₃H₈       1 mole CO₂
= 749 grams COâ‚‚
