Calculating the Number of Gram Atoms in Sodium (Na)

To calculate the number of gram atoms in 2.3 g of sodium (Na), we need to follow the given steps:

Step 1: Determine the atomic mass of sodium (Na)

The atomic mass of sodium is 22.99 g/mol. This means that one mole of sodium weighs 22.99 grams.

Step 2: Calculate the number of moles of sodium in 2.3 g of Na

To calculate the number of moles of sodium in 2.3 g of Na, we can use the formula:

moles = mass / atomic mass

Substituting the values, we get:

moles of Na = 2.3 g / 22.99 g/mol = 0.1 mol

Therefore, 2.3 g of Na is equivalent to 0.1 moles of Na.

Step 3: Calculate the number of gram atoms in 0.1 moles of Na

To calculate the number of gram atoms in 0.1 moles of Na, we need to multiply the number of moles by Avogadro's number (6.02 x 10^23). The formula is:

number of gram atoms = moles x Avogadro's number

Substituting the values, we get:

number of gram atoms = 0.1 mol x 6.02 x 10^23 = 6.02 x 10^22 gram atoms

Therefore, 2.3 g of Na is equivalent to 6.02 x 10^22 gram atoms of Na.

Conclusion:

Thus, the number of gram atoms in 2.3 g of sodium (Na) is 6.02 x 10^22.

No of gram atoms = wt./ mecular mass
= 2.3/23
= 0.1