Question

on starting with 48 gm of Mg abd 64 gm of O2 calculate the mass of Mgo​

Answer 1

Answer:

The ratio of atoms is the same as the ratio of moles. ...

Mass of Mg = 0.297 g.

Mass of magnesium oxide = mass of Mg + mass of O.

0.493 g = 0.297 g + mass of O.

Mass of O = (0.493 – 0.297) g = 0.196 g.

There is 1 mol of Mg for 1 mol of O .

The empirical formula of magnesium oxide is MgO .

Answer 2

Answer:

Stoichiometry and Stoichiometric Calculations ... 32.0 grams ... The atomic masses of Mg and O are 24.3 g/mol and 16 g/mol respectively. The molar mass of MgO=24.3+16=40.3g/mol. Number of moles is the ratio of mass to molar/atomic mass. ... 64 g of O2 corresponds to 2×1664​=2 moles ... Mass of MgO =2×40.3=80.6g

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