Mass of oxygen = 0.49g- 0.33g = 0.16g Number of moles = given mass / molar mass Number of moles of oxygen = 0.16/ 16 = 0.01 mol Molar Mass of magnesium = 24.3g Moles of magnesium = 0.33g / 24.3g = 0.0135 mol Moles of magnesium 0.0135 1.35 3 4 ------------------------ = _____________ = ____________ x ________ = ___ Moles of oxygen 0.01 1 3 3 The ratio between the moles of magnesium used and the moles of oxygen uses is 4/3. Based on your experimental data, write the empirical formula for magnesium oxide. Is this the molecular formula or the simplest formula? Explain how you know this.
Mass of oxygen = 0.49g- 0.33g = 0.16g Number of moles = given mass / molar mass Number of moles of oxygen = 0.16/ 16 = 0.01 mol Molar Mass of magnesium = 24.3g Moles of magnesium = 0.33g / 24.3g = 0.0135 mol Moles of magnesium 0.0135 1.35 3 4 ------------------------ = _____________ = ____________ x ________ = ___ Moles of oxygen 0.01 1 3 3 The ratio between the moles of magnesium used and the moles of oxygen uses is 4/3. Based on your experimental data, write the empirical formula for magnesium oxide. Is this the molecular formula or the simplest formula? Explain how you know this.
Chemistry by OpenStax (2015-05-04)
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ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
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Chapter4: Stoichiometry Of Chemical Reactions
Section: Chapter Questions
Problem 85E: A 0.025-g sample of a compound composed of boron and hydrogen, with a molecular mass of ~28 amu,...
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Mass of oxygen = 0.49g- 0.33g
= 0.16g
Number of moles = given mass / molar mass
Number of moles of oxygen = 0.16/ 16 = 0.01 mol
Molar Mass of magnesium = 24.3g
Moles of magnesium = 0.33g / 24.3g = 0.0135 mol
Moles of magnesium 0.0135 1.35 3 4
------------------------ = _____________ = ____________ x ________ = ___
Moles of oxygen 0.01 1 3 3
The ratio between the moles of magnesium used and the moles of oxygen uses is 4/3.
Based on your experimental data, write the empirical formula for magnesium oxide.
Is this the molecular formula or the simplest formula? Explain how you know this.
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