21. Choose the best answer.
The process of staying the same is

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel