`6.0221367xx10^(23)` atoms/mol number of entities in one mole is so important that it is given a separate name and symbol. It is know as …..A… here A refers to

Options

A. Planck's constant
B. Avogadro constant
C. Equilibrium constant
D. Exponential constant

Answer

To solve the question regarding the significance of the number \(6.0221367 \times 10^{23}\) atoms/mol, we can follow these steps:

### Step 1: Understand the Concept of a Mole
A mole is a fundamental unit in chemistry that is used to express amounts of a chemical substance. It is defined as the quantity of substance that contains as many entities (atoms, molecules, ions, etc.) as there are in 12 grams of carbon-12.

**Hint:** Recall that a mole is a counting unit in chemistry, similar to how a dozen refers to 12 items.

### Step 2: Identify the Number of Entities in a Mole
The number \(6.0221367 \times 10^{23}\) is known as Avogadro's number. It represents the number of atoms, molecules, or other entities in one mole of a substance.

**Hint:** Remember that Avogadro's number is a constant that helps convert between the macroscopic scale (grams, liters) and the microscopic scale (atoms, molecules).

### Step 3: Name and Symbol of the Number
The number \(6.0221367 \times 10^{23}\) is specifically referred to as Avogadro's constant. It is denoted by the symbol \(N_A\).

**Hint:** Think about how constants in science often have specific names and symbols that are widely recognized.

### Step 4: Conclusion
Thus, the answer to the question is that \(A\) refers to Avogadro's constant, which is crucial for converting between the number of entities and the amount of substance in moles.

**Final Answer:** A refers to Avogadro's constant.