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What is the molar mass of a substance that is 23.4 percent N by mass and one molecule contains 5 nitrogen atoms?
Wiki User
∙ 14y ago
The gram atom mass of 5 nitrogen atoms is 5 times the gram atom mass for a single nitrogen atoms, which can be found, in a periodic table or other reference, to be 14.007. Therefore the gram atom mass of 5 N atoms is 5 X 14.007 = 70.035.
23.4 % = 0.234. From the problem statement, the unknown molar mass M of the substance obeys the relationship 0.234 M = 70.035, or M = 299, to the justified number of significant digits.
Wiki User
∙ 14y ago
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