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Some Basic Concepts of Chemistry
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12/08/2021 11:16 am
Topic starter
What is the empirical formula of vanadium oxide, if 2.74 g of the metal oxide contains 1.53 g of metal?
(a) V2O3
(b) VO
(c) V2O5
(d) V2O7
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12/08/2021 11:20 am
Correct answer: (c) V2O5
Explanation:
Mass of oxide = Mass of metal + Mass of oxygen
2.74 + 1.53 + WOxygen ⇒ WOxygen = 1.21 g
Moles of V = \(\frac{1.53}{51}\) = 0.03
Moles of O = \(\frac{1.21}{16}\) = 0.075
V0.03O0.075
VO2.5 ⇒ V2O5