A sample of an ionic compound containing iron and chlorineis analyzed and found to have a molar mass of 126.8 g>mol.What is the charge of the iron in this compound?(a) 1+ (b) 2+ (c) 3+ (d) 4+

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A: The percent mass of an element in a compound can be calculated by using the following formula:

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.