Answer:
billion is larger \ part if billion
Answer:
Provide more strength
Explanation:
Rust is metal that has been oxidised . Oxides are usually more fragile and porous than their crystals metal equivalents. Some oxides, such as Aluminum oxide, are useful because they have a thin, strong shell that protects the metal from further corrosion.
A bag of soil will weigh in kilograms
30% should be the percentage of oxygen if the total mass of fe2o3 is 160.