How many atoms are present in 2 grams of calcium? (GAW of Ca is 40g)

Explanation

To find out how many atoms are present in 2 grams of calcium, we can follow these steps:

### Step 1: Understand the Given Information
We know that the gram atomic weight (GAW) of calcium (Ca) is 40 g. This means that 40 grams of calcium contains one mole of calcium atoms, which is equivalent to Avogadro's number (Na) of atoms.

### Step 2: Identify Avogadro's Number
Avogadro's number (Na) is approximately \(6.022 \times 10^{23}\) atoms/mole. This is the number of atoms in one mole of any substance.

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