Question

Which of the following is NOT equal to Avogadro’s number?
Group of answer choices

6.02x10 to the power of 23 molecules of CO

The mass of 2 moles of Br subscript 2

The number of atoms in 1 mol of Au

The number of molecules in 1 mol of N subscript 2

Answer 1

Answer:

The mass of 2 moles of Br subscript 2

Explanation:

1 mol of any substance contains 6.02*10^23 particles of this substance. This number is called Avogadro’s number.

6.02x10 ^ 23 molecules of CO - Avogadro’s number.

The mass of 2 moles of Br2 - 2 moles than it has 2 *Avogadro’s number.

The number of atoms in 1 mol of Au - 1 mol has Avogadro’s number of atoms of Au

The number of molecules in 1 mol of N subscript 2 - has Avogadro’s number of molecules N2.

Answer 2

Statement that doesn't state equality of Avogadro’s number to given molecules is B:The mass of 2 moles of Br subscript 2

• Avogadro's number can be regarded as number of units that is present in 1 mole of any substance. And this said to be equal $[6.02214076 8 10^23]$

• Option A: expressed Avogadro's number itself which is right, option D expressed number of mole present in just "one mole" of N2, then it's correct.

• Option C also expressed one atom in Au, which is also correct, but Option B expressed "2mole" of Br which us not equal to Avogadro's constant.

Therefore, option B is correct.

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