أفسر البيانات كيف تغيرت الكتلة خلال التفاعل الكيميائي?
حل مادة العلوم خامس ابتدائي الفصل الدراسي الثاني ف2مجموع كتل المواد لم يتغير التفاعل الكيميائي
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أفسر البيانات كيف تغيرت الكتلة خلال التفاعل الكيميائي?