Answer:
The value is [tex] M_{o} = 175 g[/tex]
Explanation:
Generally the reaction between oxygen and magnesium is
[tex]2Mg_{({s})} + O_2_{(g)} \to 2MgO_{(s)}[/tex]
Generally from the law of mass conservation in a chemical reaction we have that
[tex]M_{m} + M_{o} = M_{z}[/tex]
Here [tex]M_{m}[/tex] is the mass of magnesium
[tex]M_{o}[/tex] is the mass of oxygen
[tex]M_{z}[/tex] is the mass of magnesium oxide
So
[tex]425+ M_{o} = 600[/tex]
=> [tex] M_{o} = 600 - 425[/tex]
=> [tex] M_{o} = 175 g[/tex]