he 64.8-g sample of the compound X2O5 contains 48.0 g of oxygen atoms. What is the molar mass of element X?

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16-09-2016
Chemistry

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he 64.8-g sample of the compound X2O5 contains 48.0 g of oxygen atoms. What is the molar mass of element X?

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taskmasters taskmasters · Answer 1 · 2016-09-28T13:38:32+02:00

taskmasters taskmasters

28-09-2016

We calculate the molar mass of element X as follows:

No. of moles = 48/16 = 3.2 mol

Mass of X2 = 64.8 - 48 = 16.8 g

2 molesX/5 mole O= x/ 3.00 moles O

x = 1.2 moles of X

Molar mass = 16.8g/ 1.2 mol = 14 g/mol

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