Consider this question: what mass of concentrated solution nitric acid( 68.0% hno3 by mass) is needed to prepare 400.0 g of a 10.0% solution of hno3 by mass?
(a) outline the steps necessary to answer the question
(b) answer the question

The mass of concentrated nitric acid solution required is 58.82 g

Explanation:

To calculate the mass of concentrated solution, we use the equation:

where,

are the concentration and mass of concentrated solution.

are the concentration and mass of diluted solution.

We are given:

Putting values in above equation, we get:

Hence, the mass of concentrated nitric acid solution required is 58.82 g

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

elements

explanation:

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