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tung1872001
2 năm trước
1. Hòa tan m gam SO3 vào 500 ml dung dịch H2SO4 24,5% (D = 1,2 g/ml) thu được dung dịch H2SO4 49%. Tính m gam SO3. 2. Hòa tan 200 gam SO3 vào m gam dung dịch H2SO4 49% ta được dung dịch H2SO4 78,4%. Tính giá trị m. Làm giúp mk bài này với ạ Mk cảm ơn nhiều nha Mình cần gấp lắm
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