user-avatar
thieuxuanht
2 năm trước
Cho 200 ml dd Ba(OH)2 vào 100 ml dd H2SO4 thì thu được 23,3g kết tủa và dung dịch A. Cho tiếp 100 ml dd HCl 2M vào dd A thì trung hòa hoàn toàn. Nồng độ mol/l của dd H2SO4 và Ba(OH)2 đã dùng lần lượt là: (Ba=137, S=32, O=16) A. 1M; 0,5M B. 0,5M; 1M C. 1M; 1M D. Đáp số khác
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Mn xin hãy giúp mình kèm giải thích hứa cho 5* và ctrlhn 1._______ is a branch of Natural Science, and is the study of living organisms and how they interact with their environment.a. Biology b. Biological c. Biologist d. Biologically 2.A / an ______species is a population of an organism which is at risk of becoming extinct.a. dangerous b. endanger c. endangered d. endangerment 3.Only a few of the many species at risk of extinction actually make it to the lists and obtain legal ___.a. protect b. protection c. protective d. protector 4.Almost half of turtles and tortoises are known to be threatened with ____.a. extinct b. extinction c. extinctive d. extinctly 5.Current extinction rates are at least 100 to 1,000 times higher than _______ rates found in the fossil record.a. nature b. natural c. naturally d. naturalness5.It is reported that humans are the main reason for most species' declines and habitat _______ and degradation are the leading threats.a. destroy b. destructive c. destructor d. destruction6.They eventually realize that reckless _______ of the earth's resources can lead only to eventual global disaster. a. exploit b. exploitable c. exploitation d. exploitative7.Farmers make their soil more productive by distributing _______.a. fertile b. fertility c. fertilizers d. fertilizable8.Chemical wastes from factories are _____ that cause serious da

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team