Balance the following chemical reactions b y choosing the correct coefficients from the dropdown menus. V C2H6 + 02 --> CO2 + H20​

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.