Balancing Chemical Equations

What is the fundamental principle behind balancing chemical equations?

• To ensure the total mass of reactants equals the total mass of products.

• To change the chemical properties of the substances involved.

• To alter the types of atoms present in the reaction.

• To make the equation look aesthetically pleasing.

What coefficient should be placed in front of F2 to balance the chemical equation Xe + F2 → XeF6?

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When balancing a chemical equation, which of the following actions is strictly prohibited?

• Adding coefficients in front of compounds.

• Changing the subscripts within a chemical formula.

• Counting the number of atoms for each element.

• Adjusting coefficients to match atom counts on both sides.

To balance the equation Ag + H2S → Ag2S + H2, what coefficient must be placed in front of Ag?

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In the unbalanced equation KOH + CO2 → K2CO3 + H2O, if a coefficient of 2 is placed in front of KOH, what is the total number of oxygen atoms on the reactant side?

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What are the coefficients needed to balance the reaction FeO + C → Fe + CO2?

• 1, 1, 1, 1

• 2, 1, 2, 1

• 1, 2, 1, 2

• 2, 2, 2, 1

What is the coefficient for carbon (C) on the reactant side when the equation SiO2 + C → SiC + CO is balanced?

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When balancing the reaction FeCl3 + NaOH → Fe(OH)3 + NaCl, what coefficient should be placed in front of NaOH?

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In the balanced chemical equation 2Al + 3H2SO4 → Al2(SO4)3 + 3H2, what is the coefficient for H2SO4?

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What is the coefficient for H2O in the balanced chemical equation NH3 + CuO → Cu + N2 + H2O?

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