The percent composition (by mass) of hydrogen peroxide (H2O2) is a) 2 H, 32 0
b) 6%H, 94 % 0
c) 50 % H, 50% 0
d) 2 H, 20

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.