Answer:
From the periodic table, Atomic number of fluorine is 7 and atomic mass is 19
P1V1=4P1V2
V2/V1= P1/4P1
V2/V1= 1/4
V2=1/4*V1
volume will decrease by factor 1/4
Answer: This is only a guess: The "following chemical formula: " doesn't appear on my screen. But since you mentioned Mg and Cl, I would guess MgCl2
Explanation: Mr loses 2 electrons while each Cl gains one each: Two chlorines for every 1 magnesium.
Answer:
The metal responds in a certain way with dilute HCl to give it's corresponding chloride and hydrogen gas is liberated.
