I have a capsule it is completely sealed, it has plants, small herbivores, predators and decomposing microorganisms. I have a way of measuring the total energy of the system. I start with a total of 10,000 calories, but after a few days I only detect that there are 200 calories. My capsule still weighs the same. What's going on? Help!

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

For the following dehydrohalogenation (e2) reaction, draw the zaitsev product(s) resulting from elimination involving c3–c4 (i. e., the carbon atoms depicted with stereobonds). show the product stereochemistry clearly. if there is more than one organic product, both products may be drawn in the same box. ignore elimination involving c3 or c4 and any carbon atom other than c4 or c3.

The excretory system, need answers for all: )