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A gaseous compound is 78.14 percent boron and 21.86 percent?

Anonymous

∙ 16y ago

Updated: 6/11/2024

v = 0.0743 l
t = 27 + 273 = 300 k
n = pv / rt = 1.12 x 0.0743 / 0.0821 x 300 = 0.00338
molar mass = 0.0934 / 0.00338 = 27.6 g/mol

78.14 / 10.811 = 7.22
21.86 / 1.00794 = 21.69
we divide by smallest number :
7.22 / 7.22 = 1 (boron)
21.69 / 7.22 = 3 ( hydrogen)
bh3 is the empirical formula
mass empirical formula = 13.8
27.6 / 13.8 =2
the molecular formula is b2h6

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∙ 16y ago

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