Zinc metal reacts with hydrochloric acid to produce zinc chloride and hydrogen gas as seen in the chemical equations below: Zn(s) + 2HCl(aq) === ZnCl2(aq) + H2(g)

What type of equation is described above?

F. Double Replacement

G. Single Replacement

H. Decomposition

J. Synthesis

c (diamond),

sio2 (quartz)

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.