2007-09-21 08:37:41 · 6 answers · asked by minh t 1 in Science & Mathematics ➔ Earth Sciences & Geology
When iron rusts, it will react with air and water to form aggregates with oxygen and hydrogen in it. Assuming that the original sample does not loose any iron, the extra oxygen and hydrogen from the air and water will increase it's weight.
2007-09-21 08:45:36 · answer #1 · answered by John V 5 · 1⤊ 1⤋
rust is iron oxide and is the result of the combination of iron,oxygen, and moisture. so in order to rust something is added and if you take x and add y it will always weigh more.
2007-09-25 05:38:00 · answer #2 · answered by Loren S 7 · 0⤊ 0⤋
Becasu part of iron becomes oxidized. So you have some oxigen atoms added to iron atom you've had - these iron atoms dad not disappear, they stay where they were... only got a companion now (chemical formula for the rust is Fe2O3).
2007-09-21 08:45:30 · answer #3 · answered by Sad Roger 1 · 0⤊ 1⤋
Because the rusted iron contains oxygen, which adds to its weight: Fe + ½O2 --> FeO or 2 Fe + ( 3/2) O2 --> Fe2 O3 .
2007-09-21 08:42:01 · answer #4 · answered by anobium625 6 · 2⤊ 0⤋
because the sample of iron has had oxygen added to it in a solid form and therefore weighs more. the weight of one element with the weight of another element added to it equals the weight of both elements combined.
2007-09-21 08:43:16 · answer #5 · answered by Anonymous · 2⤊ 1⤋
because rust is caused by oxidation , so it adds the weight of oxygen
2007-09-21 08:53:07 · answer #6 · answered by smile 5 · 0⤊ 1⤋