Giả sử một chai rượu có chứa 11% etanol C2H5OH về khối lượng. Nếu chai rượu đó được làm lạnh tới -20oC hỏi tại nhiệt độ đó chai rượu đó đã đông đặc chưa? Biết hằng số nghiệm lạnh của nước là -1,86 oC/m.

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.