Answer:
32
Explanation:
0.56dm of gas has 0.8g
22.4dm of gas Z has a mass of 22.4/0.56X0.8
the relative molecular mass of gas Z is 32
can be solid liquid or gas
is made of atoms and molecules
can change from one state to another without becoming a new substance just by adding or removing heat energy
Answer: The atomic number
Answer:b
a:)
