How many moles of \ce{CO2}COX
2


will be produced from 72.0 \text{ g}72.0 g72, point, 0, start text, space, g, end text of \ce{CH4}CHX
4


assuming \ce{O2}OX
2


is available in excess?

4.5 moles of carbon dioxide

Explanation:

Given parameters:

Mass of CH₄   = 72g

Unknown:

number of moles of CO₂ produced  = ?

Solution:

To solve this problem, let us write the reaction equation first;

            CH₄     +    2O₂     →    CO₂    +   2H₂O

Now we know that O₂ is in excess and CH₄ is the limiting reactant that will determine the extent of the reaction.

Let us find the number of moles of   CH₄ ;

                Number of moles  =

                                  molar mass of  CH₄ = 12 + 4  = 16g/mol

              Number of moles  =   = 4.5moles

From the reaction equation;

                     1 mole of methane produced 1 mole of carbon dioxide

       4.5 moles of methane will produce 4.5 moles of carbon dioxide

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;