In a salt crystal, the distance between adjacent sodium and chloride ions is 2.82 Angstroms (or .282 nm; refer to the supplemental practice document for refreshers on these units). What is the force of attraction between the two singly charged ions?

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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