1) how many structures are possible for a square planar molecule with a formula of ax2y2?
2)how many structures are possible for a tetrahedral molecule with a formula of ahxyz?

1) Two structures are possible with the molecular formula having square planar geometry.

2) Only one structure is possible for the formula having tetrahederal geometry.

Explanation: For both the cases, we are fixing the position of A-atom which is the central metal atom.

1) When A is fixed and we are ought to surround 2 X and 2 Y-atoms around it. There are 2 possible ways in which can be done.

When both the X-atoms are adjacent to each other, it is known as cis-conformation.

When both the X-atoms are anti to each other, it is known as trans-confirmation.

2) When A is fixed and four different groups are surrounding this atom, only 1 structure is possible which have a tetrahederal geometry.

The structure are shown in the given image below.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.