What is the mass ratio of oxygen to magnesium in magnesium oxide?
Correspondingly, what is the percent by mass of magnesium in magnesium oxide?
Percent composition by element
One may also ask, how do you calculate the mass of oxygen that reacts with magnesium? Calculating the mass of reactants
- Magnesium reacts with oxygen to produce magnesium oxide:
- 2Mg(s) + O2(g) 2MgO(s)
- Calculate the mass of magnesium needed to produce 12.1g of magnesium oxide.
- (Relative masses: Mg = 24.3, MgO = 40.3)
- number of moles of MgO =
- = 0.300 mol.
Also to know, what is the ratio of magnesium to oxygen?
2. The correct formula for magnesium oxide is MgO, a 1.0 to 1.0 ratio. But sometimes in this experiment the ratio of Mg to O comes out too low. (Example: 0.9 to 1.0) In that case, it means that there was too much oxygen relative to the mass of magnesium.
Where does the extra mass come from in magnesium oxide?
When the magnesium is heated up, the total mass increases because magnesium reacts with oxygen, forming magnesium oxide ( so it supported the hypothesis). The increased mass is because of oxygen.