Hòa tan hoàn toàn 30,4 gam chất rắn X gồm Cu, CuS, Cu2S và S bằng dung dịch HNO3 dư, thoát ra 20,16 lít khí NO duy nhất (đktc) và dd Y. Thêm Ba(OH)2 dư vào dd Y thu được m gam kết tủa. Tìm m.

Hòa tan hoàn toàn 30,4 gam chất rắn X gồm Cu, CuS, Cu2S và S bằng dung dịch HNO3 dư, thoát ra 20,16 lít khí NO duy nhất (đktc) và dd Y. Thêm Ba(OH)2 dư vào dd Y thu được m gam kết tủa. Tìm m.

Hòa tan hoàn toàn 30,4 gam chất rắn X gồm Cu, CuS, Cu2S và S bằng dung dịch HNO3 dư, thoát ra 20,16 lít khí NO duy nhất (đktc) và dd Y. Thêm Ba(OH)2 dư vào dd Y thu được m gam kết tủa. Tìm m.

Posted: 02 Sep 2020 09:58 PM PDT

 Câu 12: Hòa tan hoàn toàn 30,4 gam chất rắn X gồm Cu, CuS, Cu2S và S bằng dung dịch HNO3 dư, thoát ra 20,16 lít khí NO duy nhất (đktc) và dd Y. Thêm Ba(OH)2 dư vào dd Y thu được m gam kết tủa. Tìm...

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