The difference between a physical and a chemical change is: 1.physical change changes the phase of matter
2.chemical change changes the phase of matter
3.physical change includes phase change of matter
4.chemical change changes composition of matter

1.solid

2.carbon dioxide

3.helium

personal, she chose to do it.

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.

the maximum mass of nh3 is nh3 in grams