You can use a magnet for the metal particles the you will have the salt left
Answer:
halogen
Explanation:
It belongs to Group 17 on the periodic table, which is a halogen
1.Subscript,how many hydrogen molecules there are
2.No it is not balanced,oxygen is less than represented.
Mass = 5 g
volume = 20 cm³
density = mass / volume
therefore:
D = m / V
D = 5 / 20
D = 0.25 g/cm³
