Ca(s)+2hno3(aq)→ca(no3)2(aq)+h2(g) part a identify the oxidizing agent. identify the oxidizing agent. h2(g) hno3(aq) ca(s) ca(no3)2(aq)

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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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.