For mn3+, write an equation that shows how the cation acts as an acid.

The equation that shows Mn³⁺ acts as an acid is: [Mn(H₂0)]³⁺ + H₂0 – [MnOH(H₂0)₅]²⁺H₃0⁺

Acid can be defined in so many ways and its definition is based on different theories.

However, Acid can be defined based on the following theories:

Lewis theory: This theory was proposed by Gilbert N. Lewis in 1923. According to this theory, an acid can be defined as any substance that can accept a pair of electron to electron-rich species. Some of the Example of acid as defined by Lewis includes BF₃, SO₃

Bronsted-Lowry theory: This theory was proposed by Johannes Nicolaus Brønsted and Thomas Martin Lowry in 1923. Both chemists proposed that any compound that can donate a proton to another compound is an acid. They also suggests that a base is any compound that accepts a proton.

Arrhenius theory: This theory was introduced by Svante Arrhenius in 1887. According to this theory, an acid can be described as a substance that can dissolve in water to produce electrically charged atoms. Some Examples of Arrhenius acids include HNO₃, HBR, and H₂SO₄

However, some of the properties of acids include:

Therefore, the equation that shows Mn³⁺ acts as an acid is: [Mn(H₂0)]³⁺ + H₂0 – [MnOH(H₂0)₅]²⁺H₃0⁺

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n2(g) + 3h2-> 2nh3(g)   this is the balanced equation

note the mole ratio between n2, h2 and nh3.   it is 1 : 3 : 2   this will be important.

moles n2 present = 28.0 g n2 x 1 mole n2/28 g = 1 mole n2 present

moles h2 present = 25.0 g h2 x 1 mole h2/2 g = 12.5 moles h2 present

based on mole ratio, n2 is limiting in this situation because there is more than enough h2 but not enough n2.

moles nh3 that can be produced = 1 mole n2 x 2 moles nh3/mole n2 = 2 moles nh3 can be produced

grams of nh3 that can be produced = 2 moles nh3 x 17 g/mole = 34 grams of nh3 can be produced

note:   the key to this problem is recognizing that n2 is limiting, and therefore limits how much nh3 can be produced.