A combination of different substances that remain the same individuals substance and can be separated is what A. Mixture

B. Compound

C. Molecule

D. Element

▶A. Mixture◀

Explanation: Mixtures are physically combined structures that can be separated into their original components. A chemical substance is composed of one type of atom or molecule. A mixture is composed of different types of atoms or molecules that are not chemically bonded.

the correct answer is option A

water is used to store them because it would keep the radiation from getting out in the open and causing harm to the workers

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.