Calculate the number of atoms of carbon (c) in 340. cm3 of the colorless gas methylacetylene at 0 °c and atmospheric pressure, where its density is 1.79×10-3 g cm-3. the molecular formula of methylacetylene is c3h4.

The number of C-atoms in methylacetylene are

Explanation:

To calculate the number of atoms, we first need to calculate the number of moles. For that we use the equation of ideal gas, which is:

where,

P = pressure of the gas = 1 atm

V = Volume of the gas =    (Conversion Factor: )

n = Number of moles = ?

R = gas constant =

T = temperature of the gas =    (Conversion factor: )

Putting values in above equation, we get:

According to the mole concept:

1 mole of a compound contains number of atoms

As, 1 mole of methylacetylene contains number of C-atoms.

So, 0.0152 moles of methylacetylene contains number of C-atoms.

Hence, the number of C-atoms in methylacetylene are