16 The mass of a proton is approximately equal to the mass of A) a beta particle
B) a neutron
C) an alpha particle
D) an electron

B) a neutron

Explanation:

The mass of a proton is approximately the mass of a neutron.

Both a neutron and proton are nuclear particles that are found within the nucleus of an atom.

Protons are the positively charged particles within an atom.

Neutrons do not have any charges on them.

 Approximately the mass of:

              Protons  = 1.67 x 10⁻²⁷kg

              Neutrons  = 1.68 x 10⁻²⁷kg

water is 9/10

chemical would be 1/10

Explanation:

180/200 would be water concentration in solution

and 20/200 would be chemical solution concentration in solution (if the chemical were to be polar and mix)