Use enthalpies of formation from the textbook to calculate the standard enthalpy of reaction for the following methane–generating reaction of methanogenic bacteria, given δhf of ch3nh2(g) = –22.97 kj/mol:

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.

there are two significant figures.