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tranthuylinh
2 năm trước
Làm cách nhanh nhất, không cần giải thích. Hòa tan hoàn toàn 2,92g hh X gồm Na, Ba, BaO, Na2O trong nước dư, sau phản ứng thu được dd Y 200ml ( trong đó nồng độ Ba(OH)2 là 0,05 M) và thoát ra 0,224 l H2( đktc), Tính Cm của NaOH trong Y
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