Answer:
A for 1 and 4 B for 2 and 3 ..........
Answer: D. All of the above describe a mole
Explanation:
Mole is the unit for amount of substance.<em> </em>It is used for describing large number of particles.
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number of particles.
For example: 1 mole of Na atom will weigh 23 grams and contains atoms.
Thus all the above describes a mole.
Answer:
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