Law of conservation of mass I — task. Chemistry CBSE Live product, Class 9.

Choose the best answer:

In a sealed container, a piece of magnesium ribbon weighing \(5 g\) is burnt in oxygen weighing \(3 g\). After the reaction, magnesium oxide is formed. What will be the mass of magnesium oxide inside the container?

\(5 g\)
\(3 g\)
\(8 g\)
Cannot be determined

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4. Law of conservation of mass I

Question: