You dissolve 40 grams of table salt into 0.25 l of water. what is the molarity of the solution?

 The  molarity  of the solution    is   2.736 M

calculation

Step 1: find  moles of  table  salt (Nacl)

moles =  mass ÷molar mass

from periodic table the  molar mass  of  table salt (NaCl) = 23+35.5 = 58.5 g/mol

moles is therefore = 40 g÷ 58.5 g/mol =0.684   moles

Step 2:  find  molarity

molarity =  moles÷ volume in liters

= 0.684  moles÷ 0.25 L=2.736 M

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.

a c d and f

just finished the assignment