Question

An experiment was set up to investigate rusting. Some clean, shiny, iron nails were sealed

in a glass bottle containing some tap water. The sealed bottle was then placed on a top-pan

balance. The reading on the balance was 549.8 g.

The sealed bottle was left for one week. After one week the nails were rusty.

(a) What would you expect the reading on the balance to be after one week?

(b) Give reason for the above answer​

Answer 1

Rust is a chemical reaction. Due to law of conservation of mass, nothing would be lost or gained in the reaction. The sealed bottle further elaborates my point.