Find out Number of atoms of neon gas in 2.8 litre of gas at NTP

To find the number of atoms of neon gas in 2.8 liters at NTP (Normal Temperature and Pressure), we use the concept of molar volume of a gas.

Step 1: Use the molar volume at NTP
At NTP, one mole of any ideal gas occupies 22.4 liters. This means:

1 mole of gas = 22.4 L

Step 2: Calculate the moles of neon gas
Given volume of neon gas = 2.8 L

Number of moles of neon gas = (Given volume) / (Molar volume at NTP)

= 2.8 L / 22.4 L/mol
= 0.125 moles

Step 3: Use Avogadro’s number to find number of atoms
1 mole of any substance contains 6.022 × 10²³ particles (Avogadro's number).

Since neon is a monoatomic gas, the number of atoms is equal to the number of molecules.

Number of atoms of neon = 0.125 × 6.022 × 10²³
= 7.53 × 10²² atoms

Final Answer:
The number of neon atoms in 2.8 liters of gas at NTP is 7.53 × 10²² atoms.