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the molar mass off O2 is 32.0 g/mol. what mass in tye grams of 02 is Required to react completely with 4.00 mol mg

Respuesta :

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The balanced reaction is: 

2Mg + O2 = 2MgO 

We are given the amount of  magnesium to be reacted with O2. This will be the starting point of the calculations.

 

4.00 g C3H8 ( 1 mol Mg/ 24.31 g Mg ) ( 1 mol O2 / 2 mol Mg ) ( 32.0 g O2 / 1 mol O2 ) = 2.63 g O2

Answer:

64.0 grams!

Explanation:

Use the mole ratios

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