Home
Class 9
CHEMISTRY
Calculate the mass of the following: ...

Calculate the mass of the following:
(i) 0.5 mole of `N_(2)` gas (mass from mole of molecule)
(ii) 0.5 mole of N atoms (mass from mole of atom)
(iii) `3.011 × 10_(23)` number of N atoms (mass from number)
(iv) `6.022 × 10_(23)` number of `N_(2)` molecules (mass from number)

Text Solution

Verified by Experts

(i) mass = molar mass × number of moles
`⇒ m = M × n = 28 × 0.5 = 14 g`
(ii) mass = molar mass × number of moles
`⇒ m = M × n = 14 × 0.5 = 7 g`
(iii) The number of moles, n
= `("given number of particles")/("Avogadro number") = (N)/(N_(0))`
`=(3.011xx10^(23))/(6.022xx10^(23))`
`impliesm = M xx n = 14 xx (3.011 xx 10^(23))/(6.022 xx 10^(23))`
`=14xx0.5 = 7 g`
`n = (N)/(N_(0))`
`implies m = M xx (N)/(N_(0))= 28 xx(6.022xx10^(23))/(6.022xx10^(23))`
`= 28 xx 1= 28 g`
Promotional Banner

Topper's Solved these Questions

  • ATOMS AND MOLECULES

    NCERT|Exercise Exercise|25 Videos

  • ATOMS AND MOLECULES

    NCERT|Exercise Example|2 Videos

  • IS MATTER AROUND US PURE?

    NCERT|Exercise EXERCISE|17 Videos

Similar Questions

Explore conceptually related problems

Calculate the number of atoms in (1) 1 mole of nitrogen N_(2) (2) 1 mole of phosphorous molecules P_(4) . (3) 0.05 g of water

Calculate the number of atoms in (i) 1 mole of nitrogen (N_(2)) (ii) 1 mole of phosphorous molecules (P_(4))

Determine the mass of the following : (i) 6.022 xx 10^(23) number of O_(2) molecules (ii) 6.022 xx 10^(23) number of O atoms .

Calculate the number of atoms in : (i) 0.25 moles atoms of carbon (ii) 0.20 mole molecules of oxygen.

Calculate the number of atoms in 0.5 mole atoms of nitrogen.

The number of mole of N - atom in 18.066 x 10 ^(23) nitrogen atoms is

Calculate the number of moles for the following: (i) 52 g of He (finding mole from mass) (ii) 12.044 × 10_(23) number of He atoms (finding mole from number of particles).

Calculate the number of particles in each of the following: (i) 46 g of Na atoms (number from mass) (ii) 8 g O_(2) molecules (number of molecules from mass) (iii) 0.1 mole of carbon atoms (number from given moles)

Calculate number of atoms in 0.5 mole of oxygen atoms.

Calculate the mass of the following: (i) 0.5moles of O_(2) gas (ii) 0.5moles of O atoms (iii) 3.011xx10^(23)"atoms of O" (iv) 6.022xx10^(23)"molecules of "O_(2) (Givem: Gram atomic mass of oxygen=16g) Gram of molecular mass of oxygen (O_(2)) =32g)