Classify the following bonds as ionic, covalent, or neither (o, atomic number 8; f, atomic number 9; na, atomic number 11; cl, atomic number 17; u, atomic number 92). o with f ca with cl na with na

1. Oxygen Fluoride (O with F): covalent

2. Calcium Chloride (Ca with Cl): ionic

3. Sodium with Sodium (Na with Na): neither

Explanation:

1. Oxygen Fluoride (OF2)

Oxygen with Fluorine is covalent because both of these elements are nonmetals. Bonds that contain only nonmetals are covalent.

2. Calcium Chloride (CaCl2)

Calcium with Chlorine is ionic because there is one metal and one nonmetal. Bonds that contain one metal and one nonmetal are ionic.

3. Sodium with Sodium

Since this is not Sodium bonding with another element, it is neither ionic or covalent.

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.

your answer would be “dry”