In the balanced equation \(2Mg + O_2 \rightarrow 2MgO\), what is the total number of oxygen atoms on the product side?
Answer and explanation
Correct answer: 2
The product is \(2MgO\). Each formula unit of \(MgO\) contains one oxygen atom, and the coefficient 2 represents two formula units. Therefore, the total number of oxygen atoms is \(2 \times 1 = 2\). Although \(O_2\) also has two oxygen atoms, it is on the reactant side; atoms on the product side are counted from \(2MgO\).
Frequently asked questions
What is the correct answer to this question?
2
Why is this the correct answer?
The product is \(2MgO\). Each formula unit of \(MgO\) contains one oxygen atom, and the coefficient 2 represents two formula units. Therefore, the total number of oxygen atoms is \(2 \times 1 = 2\). Although \(O_2\) also has two oxygen atoms, it is on the reactant side; atoms on the product side are counted from \(2MgO\).
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Chemical Reactions and Equations.
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