K2CO, +2HCI 2KCI + H2O + CO2 2NaHCO → Na2CO, + H2O + CO2haalfound that carbondioxide is made up of the same elements, carbon and oxygen, irrespective of mchodsparation. The elements carbon and oxygen combined together in the same fixed ratio of 3% byht. The importance of law of definite proportions is that it is useful in deriving the chemical formulace ofpounds> 100Atomic weight of element x Number d sums of the elementent weight of a constituent clement =Gram molecular weight of compoundof Multiple Proportion:When onc clcment combines with other elements to from two or more differentounds, the mass of one clement, which combines with a constant mass of the other, bear a simple rano tonotherarbon and Oxygen react together to form Carbon Monoxide and Carbon Dioxide. Here fixed mass ofon (12 gm) reacts with different masses of oxygen(16 gm & 32 gm). Hence the ratio of messes of oxygentio 16:32 or 1:2 which proves law of multiple proportionLussac's law: Gas react or formed in the simple ratio of their volume. Provides all measurements are inme conditions of temperature and pressureH2 + Ch-2HCIIvol lvol 2volConcept:

K2CO, +2HCI 2KCI + H2O + CO2 2NaHCO → Na2CO, + H2O + CO2haalfound

1.	K2CO, +2HCI 2KCI + H2O + CO2 2NaHCO → Na2CO, + H2O + CO2haalfound that carbondioxide is made up of the same elements, carbon and oxygen, irrespective of mchodsparation. The elements carbon and oxygen combined together in the same fixed ratio of 3% byht. The importance of law of definite proportions is that it is useful in deriving the chemical formulace ofpounds> 100Atomic weight of element x Number d sums of the elementent weight of a constituent clement =Gram molecular weight of compoundof Multiple Proportion:When onc clcment combines with other elements to from two or more differentounds, the mass of one clement, which combines with a constant mass of the other, bear a simple rano tonotherarbon and Oxygen react together to form Carbon Monoxide and Carbon Dioxide. Here fixed mass ofon (12 gm) reacts with different masses of oxygen(16 gm & 32 gm). Hence the ratio of messes of oxygentio 16:32 or 1:2 which proves law of multiple proportionLussac's law: Gas react or formed in the simple ratio of their volume. Provides all measurements are inme conditions of temperature and pressureH2 + Ch-2HCIIvol lvol 2volConcept:
Answer» it is NITROGEN which FOUND beside xenonExplanation:please MARK as brainliest