When mg reacts with hcl the product is magnesium cloride and hydrogen gas
Mg + 2HCl = MgCl2 + H2
i hope i was helpful today.
They aren't actually placed into the atom, they surround it in the "electron cloud" but if you add electrons, the charge of your atom becomes negative. If your remove them, the charge becomes positive
Answer: 
formula units
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 
of particles.
To calculate the moles, we use the equation:
1 mole of 
contains of formula units
Thus 0.203 mole of contains =
of formula units
1 mole -------- 22,4 L ( at STP )
0.030 moles --- ?
V = 0.030 * 22,4 / 1
V = 0.672 L
hope this helps!
