gher2090
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Here is the balanced chemical equation for the combustion of isopropyl alcohol: 2C3H7OH(l) + 9O2(g) → 6CO2(g) + 8H2O(g) Multiplying 42 by 2/3, or 0.667, would be most useful for which calculation?

A. Calculating the moles of O2 needed to produce 42 moles of CO2.

B. Calculating the moles of CO2 that will form from 42 moles of C3H7OH.

C. Calculating the moles of O2 that will react completely with 42 moles of C3H7OH.

D. Calculating the moles of CO2 that will form from 42 moles of O2.

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MissPhiladelphia
I believe the correct answer from the choices listed above is option A. Multiplying 42 by 2/3, or 0.667, would be most useful for calculating the moles of O2 needed to produce 42 moles of CO2. Hope this answers the question.
Oseni

Multiplying 42 by 2/3 would be most useful for calculating the moles of CO2 that will form from 42 moles of O2.

Stoichiometric calculations

From the equation of the reaction:

2C3H7OH(l) + 9O2(g) → 6CO2(g) + 8H2O(g)

The mole ratio of O2 and CO2 is 3:2

Hence, if there are 42 moles of O2, the number of moles of CO2 can be calculated as:

                               42 x 2/3

More on stoichiometric calculations can be found here: https://brainly.com/question/8062886

                       

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