Compounds x and y are stereoisomers having the formula c6h12. both x and y react with one molar equivalent of hydrogen in the presence of a palladium catalyst to form hexane, and they each react with hbr to give a single bromoalkane product. draw structural formulas for both x and y.

(E)-3-hexene and (Z)-3-hexene

Explanation:

From the first clue we know that the posible structures have linear  structures, therefore we will have as options 1-hexene, 2-hexene and 3-hexene.

Using the second clue, we only have 1 product for the HBr addition. In the 1-hexene we only have 1 product for the HBr addition, but we need two molecules to answer the question, so, this molecule can be discarded. For 2-hexene we will have 2 products in the HBr addition, so, this molecule can be discarded also (figure 2). Finally, for the last option 3-hexene we will have 2 options the E isomer (cis) and the Z isomer (trans)  both molecules will have the same product in the HBr addition (figure 1).

Google it that might work

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom.