An unknown substance has the following properties: • A uniform appearance
• Physically separates by boiling
• Is a liquid at room temperature
What type of matter is this unknown substance?
-Heterogeneous mixture
-Element
-Homogeneous mixture
-Compound

Homogeneous mixture

Explanation:

Because mixture can be separated by physical methods and homogeneous are uniformly appearances

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.