The combustion of ethanol, c2h5oh(l), in oxygen to form carbon dioxide gas and water vapor is shown by which balanced chemical equation?
a) c2h5oh(l) + o2(g) → co2(g) + h2o(g)
b) c2h5oh(l) + 3o2(g) → 2co2(g) + 3h2o(g)
c) 2co2(g) + 3o2(g) → c2h5oh(l) + 3h2o(g)
d) 2co2(g) + 3h2o(g) → c2h5oh(l) + 3o2(g)

B

Explanation:

The last 2 answers can immediately be cancelled out as they're not combustion of ethanol, combustion in this context is not a reversable reaction so cannot be referenced in this way.

The answer is determined to be B just by simply counting the numbers of each of the elements on the reactants (left) side and the products (right) side and ensuring they're the same

In A on the reactants side there is 2C 6H 3O and on the products side there is 1C 3O and 2H its not equal so it is not correct

In B on the reactants side there is 2C 6H 7O and on the products side there is 2C 6H 7O its equal so this answer is correct

kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

5.6⋅10−^19  j

do you need the explaination?