Which of the following metals will react with water to produce a metal hydroxide and hydrogen gas? mg li al pb

Actually to determine which metals will react with water to form hydroxide, we have to refer to the reactivity series. In this case, our baseline would be Hydrogen ion since it is the one being displaced by the metal in the water compound (H+ OH-) to form metal hydroxide. From the series, all metals are above hydrogen, hence all will react.

all

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.