1. we only need to heat a small object such as test tube or beaker. so we do not need a gas stove. 2. there may be some liquid spilling out during heating...
...an arrow to show the last reaction 2D + 2E → H. You do not need to double Its reaction heat ΔH3 beause this reaction is exactly...
...cellulose. However, sometimes the visual quality of the final paper product does not need to be very light in color, so these paper products are made from...
...extremely intense exothermic reaction between Al & Fe2O3 and this does not need any oxygen from air. This is nothing relate to the match (火柴) ...
...since sulphonic acids are quite strong, it dissociate readily in water they do not need to be in a alkaline medium to make it become an anion
...29 12:18:30 補充： Na+ will be stayed in the salt bridge if they do not need to be used to balance the charge of solutions. 2010-12-29 12:40:46...
... also insoluble in water, but they would react with acid to dissolve. So you need to acidified it to ensure the precipitate formed are silver chloride but not other silver compounds.
...of carbon dioxide. Notice that the number of moles does not need to balance on either side of the equation. This is because a mole ...
...thermite, mixture of iron(III) oxide and aluminium, burns vigorously ( not needing oxygen) to form molten iron. it's used in welding rails in...
