15mL of 0.40M Mg(OH)2 is required to neutralize 20ml of unknown HCl. What is the concentration of the HCl?

a
0.60 M
b
0.30 M
c
0.15 M
d
0.45 M

The real answer is keeping the world healthy so we won’t die

A) the enthralling of formation for pure element in its standard state is always positivehope this : )

The answer is d.potassium

Remember that rust prevented by placing a sacrificial electrode in electrical contact with the iron. the sacrificial electrode must be composed of a metal that  oxidizes  more easily than iron (that is, it must be below iron in table 18.1).