QQuestionChemistry
QuestionChemistry
Which of the following best defines Avogadro's number?
A. Mass, in grams, of each particle of the substance
B. Number of particles in one mole of a pure substance
C. Mass, in grams, of the nucleus of the substance's atoms
D. Total mass, in grams, of all the particles in one mole of the substance
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Answer
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Step 1:: Understand the definitions of the terms provided.
Avogadro's number is a fundamental constant in chemistry and physics, representing the number of particles (atoms or molecules) in one mole of a substance. It is approximately equal to 6.022 x 10^23.
Step 2:: Identify the correct definition.
The given options are: A. Mass, in grams, of each particle of the substance B. Number of particles in one mole of a pure substance C. Mass, in grams, of the nucleus of the substance's atoms D. Total mass, in grams, of all the particles in one mole of the substance
Step 3:: Analyze the options.
Option A is incorrect because Avogadro's number refers to the number of particles, not their mass. Option C is also incorrect for the same reason, as it refers to the mass of the nucleus, not the number of particles. Option D is incorrect because it refers to the total mass, not the number of particles.
Step 4:: Select the correct answer.
The correct answer is option B: Number of particles in one mole of a pure substance.
Final Answer
The best definition of Avogadro's number is option B: Number of particles in one mole of a pure substance.
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