Cast iron is an alloy of iron that contains 2 to 4 percent carbon, along with varying amounts of silicon and manganese and traces of impurities such as sulfur and phosphorus....
Answer: Given
Mass % of iron = 69.9 %
Mass % of oxygen = 30.1 %
Element
Atomic mass
Mass %
Mass % / atomic mass
Fe
55.85
69.9
69.9/55.85 = 1.25
O
16.00
30.1
30.1/16.00 = 1.88
Fe : O = 1.25 : 1.88
Converting...