Iron(ii) can be oxidized to iron(iii) by dichromate ion, which is reduced to chromium(iii) in acid solution. a 2.5000-g sample of iron ore is dissolved and the iron converted into iron(ii). exactly 19.17 ml of 0.0100 m na2cr2o7 is required in the titration. what percentage of the ore sample was iron?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules

If maltose undergoes hydrolysis what subunits does it results to?