Answer:
1. 2HCl + MgO —-> MgCl2 + H2O
Explanation: You add a 2 in front of the HCl in order to have 2 hydrogens on each side and 2 Cl on each side. Since, Magnesium only has one on each side, they’re already balanced. Same with Oxygen so you leave it alone.
D because bits makes the most sense logically
Answer:
for a cell to produce a current the cell electrodes of the cell must have a potential difference option A is the correct answer
B. surface wave because it is a mechanical energy
