Calculate the number of atoms in 32.og Br2
Answers
Answered by
7
1 Mole of Bromine = Avogadro Number of molecules = 80g
As 80g of Bromine = Avogadro Number of molecules
32g of Bromine = Avogadro Number of molecules * 32 / 80
= 32 * 6.022 * 10^23 / 80
= 2.4088 * 10^23 atoms
As 80g of Bromine = Avogadro Number of molecules
32g of Bromine = Avogadro Number of molecules * 32 / 80
= 32 * 6.022 * 10^23 / 80
= 2.4088 * 10^23 atoms
Answered by
2
Given: the mass of Br₂ - m = 32g
To Find: Number of atoms - N =?
Solution:
Formula used:
- Number of moles - n = given mass (m)/Molecular mass(M)
- Molecular mass of Br₂ - M = 80 × 2 = 160g
- Also n = number of atoms (N)/ Avagadro number(Nₐ)
- Nₐ = 6.023 × 10²³
- Therefore, m/M = N/Nₐ
Applying the above formula to find the number of molecules of Br₂ in 32g of Br₂
m/M = N/Nₐ
32/160 =
N =
N =
N = 1.2 × 10²³
Calculating the Number of atoms of Br
Atomicity of Br₂ = 2
number of atoms = 2 × 1.2 × 10²³
= 2.4 × 10²³ atoms
Hence, the number of atoms in 32g Br₂ = 2.4 × 10²³ atoms
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