## Chemistry 9th Edition

a) Composition of a compound is based on the the amount of the both atoms, not on the previous mixture. b) The volume of $2HCl$ will be equal to the volume of either the $H_{2}$ reacted or $Cl_{2}$
b) Avogadro's hypothesis is discusses that the ratio of volume are consistently equal to the ratio of molecules provided that the pressure and temperature are the same. Therefore, since the reaction is $H_{2} (g) + Cl_{2} (g)$ -> $2HCl$ The volume of $2HCl$ will be equal to the volume of either the $H_{2}$ reacted or $Cl_{2}$