By referring to a periodic table or table of elements, we see that phosphorus (symbol P) has an atomic number of 15. Thus, each atom has 15 protons. The mass number of the ion is 15 + 16 = 31. Because the ion has 15 protons and 18 electrons (three more electrons than protons), its net charge is 3-.
2.2 pounds in a kilogram.
70/2.2 = 31.818 kg of the child.
<span>10mg/kg and the tylenol is 80 mg per tables.
Child should take 318.18 mg divide that by per tablet 318.18/80 = 3.977 tablets. </span>
<span>We are using 1 sig fig, so that would make our answer be 4 tablets.</span>
A chemical reaction is a reaction that changes the molecular structure and is normally irreversible.
Answer:
Batteries store chemical energy
Explanation:
