Bài 2. Để khử hoàn toàn 4,64 gam một oxit kim loại A cần dùng 1,792 lít khí hidro (đktc). Toàn bộ lượng kim loại thu được tác dụng vừa đủ với 600ml dung dịch HCl 0,2M. Tìm kim loại A và oxit của A

Who discovered a pattern to the elements in 1869?

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?