1.0 g of magnesium is burnt with 0.56 g ...

1.0 g of magnesium is burnt with 0.56 g `O_(2)` in a closed vessel. Which reactant is left in excess and how much?

Mg, 0.16 g

`O_(2) 0.16 g`

Mg, 0.44 g

`O_(2) 0.28 g`

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