At what volume will 22.4L of O2 (g) at 303K and 1.2atm have the same number of molecules as Neon gas at 303K and 1.2atm?

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The correct answer would be b) volume versus temperature, because they are also directly proportional.

Answer//the law of conservation of mass.;

Those are different gas lawshere is a brief description of themcharles's law states that volume and temperature are directly proportional to each other as long as pressure is held constant.  boyle's law asserts that pressure and volume are inversely proportional to each other at fixed temperature.gay-lussac's law introduces a direct proportionality between temperature and pressure as long as it is at a constant volume.    source: