When a plant is dying the worms dig air holes down to their roots which also gives the worms a place to live.

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What is the difference between an igneous, sedimentary and metamorphic rock

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