Name: 1. The nucleus is the part of the atom that
A consist mostly of empty space
B.
has a negative charge
Coccupies most of the atom's total volume
D. contains most of the atom's total mass

D.

Explanation:

There are three types of particles within atoms: protons, neutrons, and electrons.

Electrons have essentially no mass and orbit the nucleus in various energy levels.

Protons and neutrons have mass and are both found within the nucleus of the atom.

> 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.

the answer is 75.0%.