A manufacturer tested a metal coating on a ceramic tile. The coated tile was weighed and then heated in an open furnace until the metal coating had become a solid oxide. The tile was cooled before it was weighed again.
The table shows the results.
| Mass of coated tile before heating in g | Mass of coated tile after heating in g |
|---|---|
| 126.84 | 128.12 |
Calculate the increase in mass of the coated tile.
The manufacturer concluded that atoms had been created because the final balance reading was higher. Explain why this conclusion was incorrect.
95 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.