Convert 73.3 grams of chlorine (Cl) to moles.

n= 2.09 moles Cl

Explanation: To find the number of moles for Chlorine we will use the relationship between moles and the molar mass of the substance.

73.3 g Cl x 1 mole Cl / 35 g Cl

= 2.09 moles Cl

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

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