Answer:
6/15 ( by cancelling with table 3 ) 2/5 ( prime factors of 5 is 5 × 1 ) so we can write 2/5 as 2/5 ×2/2 we get 4/10 and the answer is 0.4 hope it is helpful thankyou
Explanation:
Other brainly answer
The enthalpy of the change of the reaction P₄O₆ + 2O₂ ------ P₄O₁₀ is -1300.1kJ.
The reactions are as follows:
P₄O₆ + 2O₂ ------> P₄O₁₀
P₄ + 3O₂ ------->P₄O₆
Here, ΔHₐ = -1640.1kJ
P₄ + 5O₂ --------> P₄O₁₀
Here, ΔHₓ = -2940.1kJ
The enthalpy change of any type of reaction depends on the initial and final states of the reactions and is independent of the path taken by the system to reach the product.
To find the overall change in enthalpy, we need to sum up the reactions at each stage. On reversing the reactions we get,
P₄O₆ ------> P₄ + 3O₂.................(1)
Here, ΔHₐ = +1640.1kJ
P₄O₁₀------> P₄ + 5O₂.................(2)
Here, ΔHₓ = -2940.1kJ
By adding (1) and (2) we get,
P₄O₆ + 2O₂ ------> P₄O₁₀
By reversing (1) the sign of the enthalpy is changed. The enthalpy is given by
ΔH = ΔHₐ + ΔHₓ
ΔH = 1640.1 + (-2940.1)
ΔH = -1300.1kJ
Therefore the enthalpy of the reaction, P₄O₆ + 2O₂ ------> P₄O₁₀ is -1300.1kJ
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Answer : The correct option is, (a) the energy level.
Explanation :
As we know that there are four quantum numbers :
- Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
- Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...
- Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as . The value of this quantum number ranges from . When l = 2, the value of will be -2, -1, 0, +1, +2.
- Spin Quantum number : It describes the direction of electron spin. This is represented as The value of this is for upward spin and for downward spin.
The first electron configuration quantum number describes the electron shell or the energy level of an atom. The value of 'n' ranges from 1 to the shell containing the outermost electron of that atom.
For example :
For :
(Because it is in 1st shell)
(Because it is in 's' orbital)
(Because l = 0)
(Because of the sign convention)
Hence, the correct option is, (a) the energy level.
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