Question

True or False:

C + 02 - CO2
In the chemical reaction above, the coefficient of oxygen is 2.
False
True

Answer 1

The claim that the coefficient of oxygen in the equation C + O2 → CO2 is 2 is false; the correct coefficient for molecular oxygen (O2) in this balanced equation is 1.

Step-by-step explanation:

The chemical equation provided is C + O2 → CO2. The claim is that the coefficient of oxygen is 2, which is false. In a proper balanced chemical equation for the combustion of carbon to form carbon dioxide, the equation should read: C(s) + O2(g) → CO2(g). Here, there is one molecule of oxygen (O2), which contains two oxygen atoms. Thus, the coefficient for oxygen as a molecule is 1, not 2. Coefficients in chemical equations represent the relative numbers of moles of reactants and products, which must balance to satisfy the Law of Conservation of Mass. Therefore, the balanced equation does require 1 mole of O2 (which indeed has 2 atoms of oxygen) reacting with 1 mole of carbon (C) to produce 1 mole of carbon dioxide (CO2).

Answer 2

Step-by-step explanation:

From the work of Krogh in 1918 until the present time, a very wide range of values for oxygen diffusion coefficients has been reported1–5 ranging from 1.1 × 10−4 to 4 × 10−8 cm2 sec−1.