Answered

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In a certain reaction at stp, 29.2 l of methane is combusted
with 63.3 l of oxygen.
what volume of excess reactant remains after the reaction is
complete?

Sagot :

Oseniidn

The volume of excess oxygen will 2.28 L

Stoichiometric calculation

From the equation of the reaction:

[tex]CH_4(g) + 2O_2(g) --- > CO_2(g) + 2H_2O(g)[/tex]

The mole ratio of the two reactants is 1:2.

1 mole of gas at STP = 22.4 L

Mole of 29.2 L of methane at STP = 29.2/22.4 = 1.3 moles

Mole of 63.3 L of oxygen at STP = 63.3/22.4 = 2.8 moles.

Thus, oxygen is in excess because 1.3 x 2 = 2.6 moles is needed to react with 1.3 moles methane.

Excess mole of oxygen = 2.8 - 2.6 = 0.2 moles

Volume of 0.2 moles at STP = 22.4 x 0.2 = 2.28 L

More on stoichiometric calculations can be found here: https://brainly.com/question/27287858

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