Multiple Choice
Given the reaction Zn + 2AgNO_3 → Zn(NO_3)_2 + 2Ag, how many grams of zinc (Zn) are required to react completely with 8.0 moles of silver nitrate (AgNO_3)?
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3. Chemical Reactions
Stoichiometry
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2. Which of the following is the correct method to convert between moles of one substance and moles of another substance in a chemical reaction?
A
Multiply by the molar mass of the substances involved.
B
Use the mole ratio from the balanced chemical equation.
C
Use the coefficients from the unbalanced chemical equation.
D
Divide by Avogadro's number.
Verified step by step guidance1
Understand that converting between moles of different substances in a chemical reaction requires using the relationship given by the balanced chemical equation.
Recognize that the coefficients in a balanced chemical equation represent the mole ratios of the reactants and products involved in the reaction.
Use these mole ratios as conversion factors to relate the amount in moles of one substance to the amount in moles of another substance.
Avoid using molar mass for mole-to-mole conversions, as molar mass converts between moles and grams, not between different substances directly.
Do not use Avogadro's number for mole-to-mole conversions, since it relates moles to number of particles, not to moles of another substance.
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