Formula of precipitate HNO3(aq) + Ba(OH)2(aq) --
(s)
ZnCl2(aq) + KOH(aq) -
(s)
CuSO4(aq) + H2S(ag) -
(s)
H3PO4(aq) + Ca(OH)2(aq) +
(s)
Na2CO3(aq) + NH4Cl(aq) --
s)

Ibelieve the answer is d

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?  

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Adialysis unit requires 78.5 l of water.the estimated digit is 5.