sục 6,72 lit CO2 vào 400ml dung dịch Ba(OH)2 xM. Sau phản ứng thu được m gam kết tủa. Nếu sục 11,2 lit CO2 vào 400ml Ba(OH)2 xM sau phản ứng vẫn thu được m gam kết tủa. Giá trị của m và x là ?

What is common about these molecules? a.their atoms are held together by covalent bonds. b.they are all made up of the same two atoms. c.their atoms are held together by ionic bonds. d.they are all made up of oxygen atoms only.

How have the greenhouse gasses increased from the year 2000 to 2018

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?