Sample of impure magnetite fe3o4 weighting 1.542g is dissolved by iron oxidized to fe+3 and participated as fe(oh)3, the precipitate is ignited to fe2o3 giving a weight of 1.485g. calculate the percentage of fe2o4 in the sample.

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

20 drops hope this