For each of the following compounds, determine the moles of compound present for 399.7 grams of the compound. a. The chemical formula for topaz is Al₂SiO₄F₄. How many moles of topaz are in 399.7 grams? b. The chemical formula for feldspar is K₂Al₂Si₆O₁₆. How many moles of feldspar are in 399.7 grams? c. The chemical formula for malachite is Cu₂(OH)₂CO₃. How many moles of malachite are in 399.7 grams?

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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.