The number of atoms in 0.8mole of Na are?

Options

A. 4.8 x `10^24`
B. 1.8 x `10^24`
C. 1.8 x `10^23`
D. 4.8 x `10^23`

Explanation

To find the number of atoms in 0.8 moles of sodium (Na), we can follow these steps:

### Step 1: Understand the concept of moles
1 mole of any substance contains Avogadro's number of entities (atoms, molecules, etc.), which is approximately \(6.02 \times 10^{23}\).

### Step 2: Identify the number of moles given
We are given 0.8 moles of sodium.

### Step 3: Calculate the number of atoms
To find the number of atoms in 0.8 moles of sodium, we can use the formula:
\[ \text{Number of atoms} = \text{Number of moles} \times \text{Avogadro's number} \]

Substituting the values:
\[ \text{Number of atoms} = 0.8 \, \text{moles} \times 6.02 \times 10^{23} \, \text{atoms/mole} \]

### Step 4: Perform the multiplication
Now, we perform the multiplication:
\[ 0.8 \times 6.02 = 4.816 \]
So,
\[ \text{Number of atoms} = 4.816 \times 10^{23} \, \text{atoms} \]

### Step 5: Round the answer
We can round \(4.816\) to \(4.8\) for simplicity:
\[ \text{Number of atoms} \approx 4.8 \times 10^{23} \, \text{atoms} \]

### Final Answer
Thus, the number of atoms in 0.8 moles of sodium is approximately \(4.8 \times 10^{23}\) atoms.

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