A compound is known to be a potassium halide, KX. If 4.00 g of the salt is dissolved in exactly 100 g of water, the solution freezes at -1.28˚C. Identify the halide ion in this formula. Assume that this compound is an electrolyte. [Kf = 1.858˚C/m and Tf˚ = 0˚C]
Plants incorporate carbon dioxide into sugars by means of a cycle of reactions called the Calvin cycle, which is driven by the ATP and NADPH produced in the light reactions which are consumed as CO2 is reduced to G3P.
A hydrogen atom from a water molecule have entered a plant cell - in chloroplast, where several of them react by transporting protons across the membrane, generating a gradient of proton concentration for further ATP generating.