The complete answer contains the answer choices.
This is the complete question:
Atoms of which element react spontaneously with Mg2+(aq)? (1)chromium
(2)barium
(3)iron
(4)zinc
Answer: option 2. barium.
Explanation.
1) Mg ²⁺ (aq) is the aquous cation of the metal Mg.
2) Only a metal more reactive than Mg will be able to exchange with it the oxidation states.
3) Mg is an earth alkalyne metal (group 2 of the periodic table). The metals from this group are more reactive than the metals in the groups to its right: 3, 4, 5, 6, 7, ... Only the alkalyne metals (those in group 1) are more reactive than the earth alkalyne metals.
4) Of the list, barium is the only alkalyne metal, so it is more reactive than Mg and will be able to deliver 2 electrons to transform the cations Mg²⁺ into Mg while the very Ba will become Ba²⁺.
5) Chromium, iron and zinc are transition metals, so less metallic (reactive) than Mg.
Answer:
pH = - log [concentration]
pH = - log (0.0043M)
pH = 2.37
Answer:
The Creoles were wealthy and they also had social power. The peninsulares had different positions in government.
Explanation:
The Creoles and peninsulares are slightly different from each other. The peninsulares were born in Spain while the Creoles were born in the Americas. They also have different kinds of powers which was the main cause of rivalry between them. The Creoles were very rich and famous in the society while the peninsularies occupied different political positions.