How many moles are necessary to react completely with four moles of propane in the reaction #C_3H_8 + 5O_2 -> 3CO_2 + 4H_2O#?

Answer 1

#20mol " of "O_2#

Presumably, the inquiry pertains to the quantity of oxygen moles required for a complete reaction with four moles of propane.

From the equation that is balanced:

#C_3H_8+5O_2->3CO_2+4H_2O#

Every 1 mole of #C_3H_8# reacts with 5 moles of #O_2# , therefore,

#?molO_2=4cancel(molC_3H_8)xx(5molO_2)/(1cancel(molC_3H_8))=20 molO_2#

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Answer 2

Noah Aldrich

To balance the chemical equation, you need 5 moles of oxygen gas (O₂) to react with 1 mole of propane (C₃H₈). So, to react completely with 4 moles of propane, you would need 5 moles of oxygen gas for each mole of propane, resulting in 20 moles of oxygen gas for 4 moles of propane.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

How many moles are necessary to react completely with four moles of propane in the reaction #C_3H_8 + 5O_2 -&gt; 3CO_2 + 4H_2O#?

How many moles are necessary to react completely with four moles of propane in the reaction #C_3H_8 + 5O_2 -> 3CO_2 + 4H_2O#?