If the symbol X represents a central atom, Y represents outer atoms, and Z represents lone pairs on the central atom, the structure Y---X---Y (2 lone pairs around X) could be abbreviated as XY2Z2. Classify these structures according to their shape.

Molecular Geometries:

linear
bent 120
bent 109
trigonal pyramidal
T-shaped
see saw
square planar
square pyramidal

Possiblities:

XY4Z2
XY5Z
XY2Z
XY2Z3
XY4Z
XY2Z2
XY3Z2
XY3Z

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.

the answer is d. 74.02

the answer is 0.42 is that is an option. this question provides no info