Read the given chemical reaction.

c2h6 + o2 → co2 + h2o

how many moles of co2 are produced during the complete combustion of 3.6 moles of c2h6? (5 points)

1.8 moles

4.4 moles

7.2 moles

9.2 moles

During the complete combustion of 3.6 moles of ethanol, there is produced 7.2 moles of CO2

Explanation:

The balanced equation is: 2 C2H6 + 7O2 → 4 CO2 + 6 H2O

This is the combustion reaction of ethanol. Ethanol will be completely consumed.

This means that for 2 moles of C2H6 consumed, there is consumed 7 moles of O2, and there is produced 4 moles of CO2 and 6 moles of H2O.

This means that for 3.6 moles of C2H6 consumed, there is produced 3.6 * 2 moles = 7.2 moles of CO2

During the complete combustion of 3.6 moles of ethanol, there is produced 7.2 moles of CO2

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms