Trộn 100ml dung dịch HCl 0,8M với 400ml dung dịch Ca(OH)2 0,15M được dung dịch D. Tính nồng độ mol/lít của ion OHcó trong dung dịch D .

Amixture of gaseous sulfur dioxide and oxygen are added to a reaction vessel and heated to 1000 k where they react to form so3(g). if the vessel contains 0.669 atm so2(g), 0.395 atm o2(g), and 0.0851 atm so3(g) after the system has reached equilibrium, what is the equilibrium constant kp for the reaction: 2 so2(g) o2(g) ⇌ 2 so3(g)

How will the emission of an alpha particle affect the atomic number of an atom

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?