127 grams of copper reacts with 41 grams of sulfur after the reaction is complete 9 grams of sulfur remain unreacted. What is the mass of the copper sulfide formed?

I think it might be 159g

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.

a polar bond is formed when electrons are shared unevenly between atoms