The number of atoms in 0.7mole of Na are?

Explanation

To find the number of atoms in 0.7 moles of sodium (Na), we can follow these steps:

### Step-by-Step Solution:

1. **Understand Avogadro's Number**:
Avogadro's number is a constant that represents the number of atoms, ions, or molecules in one mole of a substance. It is approximately \(6.02 \times 10^{23}\).

2. **Identify the Given Information**:
We are given that we have 0.7 moles of sodium.

3. **Calculate the Number of Atoms**:
To find the total number of atoms in 0.7 moles of sodium, we use the formula:
\[ \text{Number of atoms} = \text{Number of moles} \times \text{Avogadro's number} \]
Plugging in the values:
\[ \text{Number of atoms} = 0.7 \, \text{moles} \times 6.02 \times 10^{23} \, \text{atoms/mole} \]

4. **Perform the Multiplication**:
\[ \text{Number of atoms} = 0.7 \times 6.02 \times 10^{23} = 4.214 \times 10^{23} \, \text{atoms} \]

5. **Final Result**:
Therefore, the number of atoms in 0.7 moles of sodium is approximately \(4.2 \times 10^{23}\) atoms.