collecting by upward deliver: 果樣既gas係比空氣輕,例如NH3(ammonia) collecting by downward deliver: 果樣既gas係比空氣重,例如Cl2,CO2,SO2 Using of gas syringe: 任何既gas都得
...bio question? transpiration occurs in plants. It is the upward force exerted on the water column in the xylem vessel due to evaporation of water...
... something like this: An object in a fluid experiences an upward force equal to the weight of the fluid displaced by the object. So if...
Downward delivery. Vapour density of a gas = relative molecular mass / 2 Given Vapour density of air ~ 14.4 Vapour density of SO2 = (32.1 + 16.0* 2 ) / 2 = 32.1 As the density is higher than air, Sulphur dioxide is...
... pointing downward in B, while one of them points upward in A. in B, the two hydroxyls pointing downward have...
... than air, is floats. If test tube stands upwards , the gas may escape through some space at the opening If it is...
...block = mg - F sin 30 = mg - F/2 (F sin 30 being the vertical upward component of F on the block) Therefore, the necessary condition for ...
...usually have lower electronegativity while that are situated rightward and upward usually have higher electronegativity. 3) C The higher the...
