PLS help with this!!?? A cracking reaction produces pentane (C5H12) and ethene (C2H4). Predict the formula of the starting material.

How will the emission of an alpha particle affect the atomic number of an atom

The excretory system,need answers for all: )

An animal cell loses the ability to convert energy stored in food to energy that the cell can use. which of the cell's organelles has stopped working? a.the mitochondria b.the nucleus c.the vacuoles d.the endoplasmic reticulum