Home
Class 12
PHYSICS
Use Avogadrs's number to show that the a...

Use Avogadrs's number to show that the atomic mass unit is `1` u `=1.66 xx 10^(-27) kg`.

Text Solution

AI Generated Solution

To show that the atomic mass unit (1 u) is equal to \(1.66 \times 10^{-27}\) kg using Avogadro's number, we can follow these steps: ### Step 1: Understand the definition of a mole and Avogadro's number 1 mole of any substance contains \(6.022 \times 10^{23}\) entities (atoms, molecules, etc.). For carbon-12, 1 mole weighs 12 grams. ### Step 2: Calculate the mass of one atom of carbon-12 Since 1 mole of carbon-12 weighs 12 grams, we can express this in kilograms: \[ ...
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR PHYSICS

    CENGAGE PHYSICS ENGLISH|Exercise Exercise 5.2|27 Videos
  • NUCLEAR PHYSICS

    CENGAGE PHYSICS ENGLISH|Exercise Subjective|35 Videos
  • NUCLEAR PHYSICS

    CENGAGE PHYSICS ENGLISH|Exercise Solved Examples|17 Videos
  • MISCELLANEOUS VOLUME 5

    CENGAGE PHYSICS ENGLISH|Exercise Integer|12 Videos
  • PHOTOELECTRIC EFFECT

    CENGAGE PHYSICS ENGLISH|Exercise Integer Type|4 Videos

Similar Questions

Explore conceptually related problems

1 atomic mass unit is equal to

Express unified atomic mass unit in kg.

Express unified atomic mass unit in kg.

The nuclear radius of ._(8)O^(16) is 3 xx10^(-15) m . If an atomic mass unit is 1.67 xx 10^(-27) kg , then the nuclear density is approximately.

An elemental crystal has density of 8570 kg m^(-3) . The packing efficiency is 0.68 . If the closest distance between neighbouring atoms is 2.86 Å . The mass of one atom is (1 amu = 1.66 xx 10^(-27))kg)

If the lattice parameter of Si = 5.43 Å and the mass of Si atom is 28.08 xx 1.66 xx10^(-27) kg , the density of silicon in kg m^(-3) is (Given: Silicon has diamondcubic structure)

Find (a) the total number and (b) the total mass of neutrons in 7 mg of ._C14 ("Assume that the mass of neutron "= 1.675 xx 10^(-27)kg)

Order of magnitude of density of uranium nucleus is , [m = 1.67 xx 10^(-27 kg]

An isolated hydrogen atom emits a photon of 10.2 eV . (i) Determine the momentum of photon emitted (ii) Calculate the recoil momentum of the atom (iii) Find the kinetic energy of the recoil atom [Mass of proton = m_(p) = 1.67 xx 10^(-27) kg ]

Einstein's mass - energy relation emerging out of his famous theory of relativity relates mass (m) to energy (E ) as E = mc^2, where c is speed of light in vacuum. At the nuclear level, the magnitudes of energy are vary small. The energy at nuclear level is usually measured in MeV, where 1 MeV = 1.6 xx 10^(-13) J , the masses are measured in unified mass unit (u) where 1 u = 1.67xx10^(-27)kg. (a) Show that the energy equivalent of 1u is 931.5 MeV. (b) A student writes the relation as 1 u = 931.5 MeV. The teacher points out that the relation is dimensionally incorrect. Write the correct relation.