Question

the volume of oxygen will be required to react with 1g of calcium is (STP)
a) 0.30l
b)0.62l
c)0.28l
d)0.70l​

Answer 1

Explanation:

2Ca        +    O2             ? 2CaO

2 X 40 g       22400cm3

so, 1 g Ca will need  

 22400 / 2 x 40  cm3 of O2