Final answer:
Upon review, none of the given options match the described compound with the provided molar mass and percentages. The correct empirical formula of x2yz3 is not listed among the answers provided.
Step-by-step explanation:
In order to determine the correct formula for the compound x2yz3 with a molar mass of 105.99 g/mol and percent composition by mass of 43.38% x, 11.33% y, and 45.29% z, we will attempt to match the given percentages to the mass of the elements in the options provided. The provided information in the question suggests a compound composed of Al3+ ions and SO42- in a 2:3 ratio, which we can rewrite as Al2S3O12. This however seems to be part of another question, and doesn't give us the answer we want. To calculate the formula mass of the compound, we need to assign the given percentages to known elements, match that against the molar mass and confirm with the empirical formula.
Upon examination, none of the choices A) Li2SiO3, B) K2SO3, C) Na2CO3, D) Cu2SO3, or E) Rb2SeO3 correspond to a compound with the given molar mass and elemental percentages. Therefore, none of these options can be the compound x2yz3 described in the question.