SC-1240
Conservation of mass
Lower Sec Science · Secondary 2 · Medium · Conservation of mass
A student burns 20 g of fuel in a closed container. The total mass of the container, fuel and air before burning is 500 g. After burning, some ash and gases are formed but nothing escapes the container. What is the total mass of the container and its contents after the reaction?
- 480 g
- 500 g
- 520 g
- 20 g
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