4. A
because PbCl2 is an ionic compound and it's solid, so it's a substance.
It cannot be mixture, because it's a pure molecule.
5. D
despite that both substances are gases, colorless they are different molecules, so they should have different either chemical and physical properties
6. C
this substance made from W atoms and others are made from molecules
Answer:
Each row is called a period. Each column is called a group or family.
Explanation:
Compounds formed from non-metals consist of molecules. The atoms in a molecule are joined together by covalent bonds. These bonds form when atoms share pairs of electrons.
Answer:
Im not sure how to get it off but i know if you put like some make up or foundation it will cover it.
Explanation:
Are you being abused
100.0g x 4.184J/g/°C x 78°C ΔT = 32,645.2 Joules.
