لماذا كتلة قطعة الفحم قبل الاحتراق لا تساوي كتلة الرماد الناتجة عن الرماد

When a piece of coal is burned, it will be converted into carbon dioxide gas, water vapor, and ash. According to the law of conservation of mass, the mass resulting from the burning of coal is equal to the mass of the coal before burning.