Why are the elements in a compound in a fixed proportion? a. the greater the volume, the more there will be of one element in the compound. b. an increase in temperature will increase the volume of all elements in the compound. c. the density of the elements will never change. d. the proportion of each element will remain constant, no matter how large or small the volume.

I believe that the correct answer among the choices is:

D. The proportion of each element will remain constant, no matter how large or small the volume.

The proportion of the elements is an inherent property of a compound. It can never be changed no matter the size of the compound. This is because the elements are linked by chemical bonds.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.