B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO.
The equation is not balanced and the left side of the equation has more atoms than the right side. This means that mass was lost which does not observe the law of conservation of mass in chemical reactions.
Explanation:
The law of conservation of matter applies to chemical reaction and states that matter and energy cannot be destroyed nor created and remains constant in a closed system.
In chemical reactions, atoms rearrange themselves into new compounds but the mass remains the same. This is why it is required that we balance chemical equations. To observe this principle.
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