Chemical formula of a substance tells us everything below except a. the state of substance b. the quantity of the substance c. the relative amounts of each element within the substance d. the elements combined within the substance

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.