Final answer:
The correct formula for the product formed by the reaction of one volume of gas A with two volumes of gas B is AB2, as per Avogadro's Law and gas stoichiometry.
Step-by-step explanation:
According to Avogadro's hypothesis, when gases react at the same temperature and pressure, they do so in whole number ratios by volume, which are equivalent to the ratios of mole quantities. Given that one volume of gas A combines with two volumes of gas B to form one volume of product, and assuming ideal behavior and monatomic gases, we apply this stoichiometry to predict the formula of the product.
The volume ratio of 1:2 suggests that one particle of A reacts with two particles of B, following Avogadro's Law. If only one volume of product is formed, this indicates that one molecule of the product contains one atom of A and two atoms of B. Thus, the formula of the product would be AB2.
The correct choice is C. AB2, which means the product formed from the reaction of one volume of gas A with two volumes of gas B, to form one volume of product, is AB2.