Question

calculate the number of molecules in 1ml of oxygen at ntp

Answer 1

here is u r answer

1 mol of gas = 22414 mL = avogadro's number (6.02* 10^23) of molecules

1 mL = 6.02* 10^23 / 22414 =2.68 * 10^19 molecules

hope u understand

Answer 2

Answer: $27.1\times 10^{18}$ molecules

Explanation: According to Avogadro's law, 1 mole of every substance occupies 22.4 Liters at NTP and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}$

$\text{Number of moles}=\frac{1 ml}{22400ml}=4.5\times 10^{-5}moles$ (1L=1000ml)

Now 1 mole of $O_2$ molecule contains = $6.023\times 10^{23}$ of molecules

$4.5\times 10^{-5}moles$ of $O_2$ molecule contains = $\frac{6.023\times 10^{23}}{1}\times 4.5\times 10^{-5}=27.1\times 10^{18}$ molecules.