Home
Class 12
CHEMISTRY
X-ray diffraction studies show that copp...

X-ray diffraction studies show that copper crystallises in an fcc unit cell with cell edge of `3.608 xx 10^(-8)` cm. In a separate experiment, copper is determined to have a density of `8.92 "g/cm"^3`, calculate the atomic mass of copper.

Text Solution

Verified by Experts

The number of atoms per unit cell (Z) = 4
`therefore M = (d xx N_A xx a^3)/(Z)`
`therefore M = ((6.022 xx 10^(23) "atoms mol"^(-1)) (3.608 xx 10^(-8) "cm")^3)/("4 atoms")`
`therefore` M = 63.1 g/mol
Atomic mass of copper = 63.1 u
Promotional Banner

Topper's Solved these Questions

  • THE SOLID STATE

    KUMAR PRAKASHAN|Exercise SECTION - B (INTEXT QUESTIONS AND ANSWERS)|23 Videos

  • THE SOLID STATE

    KUMAR PRAKASHAN|Exercise SECTION - C (TEXTUAL EXERCISE)|25 Videos

  • THE SOLID STATE

    KUMAR PRAKASHAN|Exercise SECTION - A (QUESTIONS)|60 Videos

  • THE P-BLOCK ELEMENTS

    KUMAR PRAKASHAN|Exercise SECTION-E (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQS ASKED IN BOARD EXAM)|77 Videos

Similar Questions

Explore conceptually related problems

A steady current of 10.0 A is maintained in a copper voltmeter . Calculate the time required to deposit 2.5 g of copper . Relative atomic mass of copper = 63.5 g .

If a cricket ball having mass of 200 gms is thrown with a speed of 3 xx 10^3 cm/sec., then calculate the wavelength related to it.

A shot-put is a metallic sphere of radius 4.9 cm. If the density of the metal is 7.8 g per cm^(3) , find the mass of the shot-put.

At room temperature, pollonium crystallizes in a primitive cubic unit cell. If a = 3.36 Å, calculate the theoretical density of pollonium, its atomic mass is 209 g mol^(-1) .

An electric dipole is prepared by taking two electric charges of 2 xx 10^(-8) C separated by distance 2 mm. This dipole is kept near a line charge distribution having density 4 xx 10^(-4) C/m in such a way that the negative electric charge of the dipole is at a distance 2 cm from the wire as shown in the figure. Calculate the force acting on the dipole. [Take k=1/(4piepsilon_(0)) = 9 xx 10^(9) Nm^(2)C^(-2) ]

An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 xx 10^4 NC^(-1) . (Millikan's oil drop experiment). The density of the oil is 1.26 g cm^(-3) . Estimate the radius of the drop, (g = 9.81 ms^(-2), e = 1.60 xx 10^(-19 C)) .