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A sample containing only silicon and fluorine was decomposed yielding 9.27 mg of silicon and 17.5 mL of fluorine gas (density = 1.43 g/L).?
What is the empirical formula of the sample compound?
thanks!
1 Answer
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- Trevor HLv 76 years ago
You have 9.27mg Si
You have 17.5/1000*1.43 = 0.025g = 25mg
Simplify by calling these g
Si = 9.27g
F = 25g
Divide by atomic mass:
Si = 9.27/28 = 0.33
F = 25/19 = 1.32
Remove fractions - multiply through by 3
Si = 0.33*3 = 1
F = 1.32*3 = 4
Empirical formula SiF4
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