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Questions and Answers
What is the purpose of using chemical formulae instead of words in a chemical equation?
What is the purpose of using chemical formulae instead of words in a chemical equation?
- To make the equation longer and less useful
- To make the equation more concise and useful (correct)
- To make the equation harder to understand
- To make the equation less accurate
What does the law of conservation of mass state?
What does the law of conservation of mass state?
- The number of atoms of each element changes before and after a chemical reaction
- Mass can be created in a chemical reaction
- Mass can be destroyed in a chemical reaction
- The total mass of the elements present in the products must be equal to the total mass of the reactants (correct)
Why do we need to balance a skeletal chemical equation?
Why do we need to balance a skeletal chemical equation?
- To ensure that the number of atoms of each element remains the same before and after a chemical reaction (correct)
- To violate the law of conservation of mass
- To create more confusion
- To make the equation longer
How can you determine if a chemical equation is balanced?
How can you determine if a chemical equation is balanced?
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What does a balanced chemical equation ensure about the number of atoms of each element?
What does a balanced chemical equation ensure about the number of atoms of each element?
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What is represented by 'Mg' in a chemical equation?
What is represented by 'Mg' in a chemical equation?
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What is represented by 'O' in a chemical equation?
What is represented by 'O' in a chemical equation?
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What does 'MgO' represent in a chemical equation?
What does 'MgO' represent in a chemical equation?
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What happens if the mass is not the same on both sides of a chemical equation?
What happens if the mass is not the same on both sides of a chemical equation?
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What word-equation can be represented as Mg + O -> MgO?
What word-equation can be represented as Mg + O -> MgO?
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