QUESTION 6 What mass of ethane, C2H6, contains the same number of molecules as 3.00 g of trichlorofluoromethane, CCl3F? 13.7 g O 0.655 g 1.52 g 0.0727 g QUESTION 7 How many oxygen atoms are there in 7.00 g of sodium dichromate, Na2Cr207? 0.187 oxygen atoms 22 1.60 x 10 oxygen atoms oxygen atoms 21 2.30 x 10 oxygen atoms 1.13 x 10 23

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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.