Home
Class 11
CHEMISTRY
The average mass of one gold atom in a s...

The average mass of one gold atom in a sample of naturally occuring gold is `3.2707xx10^(-22) g`. Use this to calculate the molar mass of gold.

Text Solution

Verified by Experts

The correct Answer is:
`196.2`

Molar mass
`=3.2707xx10^(-22)xx6.023xx10^(23)=196.99426gm`
Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

200 cm^(3) of an aqueous solution of a protein contains 1.26 g of the protein. The osmotic pressure of such a solution at 300 K is found to be 2.57xx10^(-3) bar. Calculate the molar mass of the protein.

Estimate the average mass density of a sodium atom assuming its size to be about 2.5Å. (Use the known values of Avagardo's number and the atomic mass of sodium). Compare it with the mass density of sodium in its crystalline phase : 970 kg m^(-3) . Are the two densities of the same order of magnitude ? If so, why ?

Knowledge Check

  • 13.8 g element consist 4.6xx10^(22) atoms which the atomic mass of element ?

    A
    290
    B
    180
    C
    34.4
    D
    10.4
  • In hydrogen atom electron makes transist from n = 3 orbit to n = 2 orbit in time 1.2xx10^(-8) s. Then calculate the average torque (in Nm) that acts during this transition.

    A
    `1.055xx10^(-26)`
    B
    `4.40xx10^(-27)`
    C
    `1.7xx10^(-26)`
    D
    `8.79xx10^(-27)`
  • Similar Questions

    Explore conceptually related problems

    The concentration of saturated solution of Mg(OH)_2 is 8.2 xx 10^(-4) % w/V. Calculate its solubility product. Its molecular mass is 58.3 g "mol"^(-1)

    Silver crystallises in fcc lattice. If edge length of the cell is 4.07 xx 10^(-8) cm and density is 10.5 "g cm"^(-3) , calculate the atomic mass of silver.

    Suppose the average mass of raindrops is 3.0 xx 10^(-5) kg and their average terminal velocity 9 ms^(-1) . Calculate the energy transferred by rain to each square metre of the surface at a place which receives 100 cm of rain in a year.

    In the determination of molecular mass by Victor - Meyer's Method 0.790 g of a volatile liquid displaced 1.696 xx 10^(-4) m^(3) of moist air at 303 K and at 1 xx 10^(5) Nm^(-2) pressure. Aqueous tension at 303 K is 4.242 xx 10^(3) Nm^(-2) . Calculate the molecular mass and vapour density of the compound .

    (i) Calculate the total number of electron present in one mole of method (ii) Find (a ) the total number and ( b) the total that mass of neutron = 1.675 xx 10^(27) kg (iii) Find (a ) the total number and ( b) the total mass of protons in 34 of NH_(3) at STP Will the answer change if the temperature and pressure are changed ?

    A closed container of volume 0.02m^3 contains a mixture of neon and argon gases, at a temperature of 27^@C and pressure of 1xx10^5Nm^-2 . The total mass of the mixture is 28g. If the molar masses of neon and argon are 20 and 40gmol^-1 respectively, find the masses of the individual gasses in the container assuming them to be ideal (Universal gas constant R=8.314J//mol-K ).