The mass of oxygen needed to react 10.0g of calcium to form calcium oxide is 4 g.
The given parameters;
- mass of the calcium = 10 g
- atomic mass of oxygen = 16 g/mol
- atomic mass of calcium = 40 g/mol
The given chemical reaction;
[tex]2Ca \ + \ O_2 \ ---> \ 2CaO[/tex]
from the reaction above we can deduce the following;
80 g of calcium ---------------- 32 g of oxygen
10 g of calcium ----------------- ?
[tex]= \frac{10 \times 32}{80} \\\\= 4 \ g[/tex]
Thus, the mass of oxygen needed to react 10.0g of calcium to form calcium oxide is 4 g.
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