If 249.8 mL of nitrogen gas, measured at 728.4 mmHg and 19.7 oC, reacts with excess iodine according to the following reaction, what mass of nitrogen triiodide is produced? N2(g) + 3I2(s) →2NI3(s)N2(g) + 3I2(s) →2NI3(s) Select one: a.   7.86g  NI37.86g  NI3 b.   9.87g  NI39.87g  NI3 c.   4.77g  NI34.77g  NI3 d.   2.33g  NI3

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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.