<span>it is called precipitant</span>
I think that it is helium, but not 100% sure
Carbon-13 has 7 neutrons and carbon-12 has 6 neutrons. Carbon-12 is the most common isotope of carbon. Carbon-14 is radioactive and very rare. The symbols for the isotopes of carbon atoms shown here indicate they each have six protons but mass numbers of 14, 13 and 12.
Answer: Hydrochloric acid poses a various health risk
