1, A mineral sample is obtained from a region of the country that has high arsenic contamination. An elemental analysis yields the following elemental composition: Element Atomic Weight (g/mol) Percent Composition Zn 65.409 23.4% As 74.9216 53.7% O 15.9994 22.9%

Q: A. What is its empirical formula? (Enter 1 if the corresponding subscript is 1.) C 16 H9 N4 Na 3 S2…

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A: Mole is represented by the symbol mol. It is unit of measurement of substance. Mass is defined as…

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Q: A sample of Water, H2O, has a mass of 55 grams. Determine the number of moles in the sample.

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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.