A redox reaction is a type of chemical reaction that involves the transfer of electrons from one substance to another. Oxidation is the process in which electrons are lost, whereas reduction is the process in which electrons are gained. Answer to the question is C, which is 5.
MnO4– ion can gain electrons to form Mn2+ and Br– ion can lose electrons to form Br2.A reduction-oxidation reaction (redox reaction) is a chemical reaction that includes the transfer of electrons between atoms. The transfer of electrons between the reactants is the most important feature of the redox reaction and helps to determine the net charges of the reactants. The number of electrons transferred in a redox reaction can be calculated from the oxidation numbers of the atoms in the reactants.
Balanced chemical equation:
2 MnO4(aq) + 10 Br(aq) + 16 H+(aq) → 2 Mn2+(aq) + 5 Br2(aq) + 8 H2O(l)
Half-reactions:
2 MnO4–(aq) + 16 H+(aq) + 10 e– → 2 Mn2+(aq) + 8 H2O(l) (Reduction)
10 Br–(aq) → 5 Br2(aq) + 10 e– (Oxidation)
Overall, the balanced equation is made up of two half-reactions that sum up to the overall redox reaction. Two electrons are lost in each oxidation half-reaction and two electrons are gained in each reduction half-reaction. Therefore, the number of electrons transferred is 4 (2 + 2). There are four electrons transferred in the reaction represented by the balanced equation above. This type of reaction can be used to generate electricity, as well as to produce certain types of chemicals and materials.
The balanced chemical equation given in the question is:
2 MnO4(aq) + 10 Br(aq) + 16 H+(aq) → 2 Mn2+(aq) + 5 Br2(aq) + 8 H2O(l)
This reaction involves two half-reactions, one for oxidation and the other for reduction.
The half-reaction for the oxidation of Br is:
10 Br(aq) → 5 Br2(aq) + 10 e-
The half-reaction for the reduction of MnO4 is:
2 MnO4(aq) + 16 H+(aq) + 10 e- → 2 Mn2+(aq) + 8 H2O(l)
By multiplying the oxidation half-reaction by 2 and adding it to the reduction half-reaction, we get the balanced chemical equation for the overall redox reaction. The number of electrons transferred in the reaction is equal to the number of electrons lost in the oxidation half-reaction, which is 10, and the number of electrons gained in the reduction half-reaction, which is 10. Therefore, the total number of electrons transferred in the reaction is 10 + 10 = 20. However, we need to divide this number by 2 because two electrons are involved in each half-reaction. Thus, the number of electrons transferred in the reaction is 20/2 = 10.
In the given balanced chemical equation, the number of electrons transferred is 10, which can be obtained by adding the number of electrons lost in the oxidation half-reaction and the number of electrons gained in the reduction half-reaction. However, since two electrons are involved in each half-reaction, we need to divide this number by 2, which gives us the answer of 10/2 = 5. Therefore, the answer to the question is C, which is 5.
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the policy or action by which one nation controls another country/territory
The policy or action by which one nation controls another country or territory is commonly referred to as colonialism or imperialism.
Colonialism involves the establishment and maintenance of political, economic, and social domination over a foreign land and its people.
During colonialism, the controlling nation often exerts its authority through various means, such as military force, political manipulation, economic exploitation, cultural assimilation, and the imposition of its own legal and administrative systems. The primary motivations behind colonialism can vary, including economic interests, strategic advantages, ideological beliefs, and the desire for territorial expansion. Colonialism has been a significant feature of world history, with numerous examples throughout different periods, such as the European colonization of the Americas, Africa, and Asia during the Age of Discovery and subsequent centuries. Colonial rule often involves the subjugation of the colonized population, the exploitation of resources, the suppression of local cultures and traditions, and the imposition of the colonizer's language, religion, and social norms. Over time, there has been a growing recognition of the negative impacts of colonialism, including the violation of human rights, socio-economic inequalities, cultural erasure, and the disruption of indigenous societies. The process of decolonization, through which colonies gained independence and self-governance, has been a significant development in the 20th century, leading to the formation of sovereign nations.
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write the name and formula of the compound made of magnesium and fluorine. 15px
The name of the compound made of magnesium and fluorine is magnesium fluoride and its formula is MgF2. Magnesium fluoride is a white crystalline solid that has a bitter taste and is insoluble in water. Magnesium fluoride is a stable ionic compound with a high melting point.
This compound is the primary source of magnesium and fluoride ions in many industrial and chemical processes. Magnesium fluoride is produced by the reaction between magnesium oxide and hydrogen fluoride.
MgO + 2HF → MgF2 + H2O
In the laboratory, magnesium fluoride is produced by dissolving magnesium hydroxide in hydrofluoric acid.
Mg(OH)2 + 2HF → MgF2 + 2H2O
Magnesium fluoride is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.
Magnesium fluoride is a white crystalline solid with a bitter taste that is insoluble in water. It is the primary source of magnesium and fluoride ions in many industrial and chemical processes. The formula of magnesium fluoride is MgF2. It is used in the production of ceramics and glass as a flux and to increase the resistance of the glass to attack by acids. Magnesium fluoride is also used as an optical coating on lenses and other optical components as it has a low refractive index.
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which one of the following annelid structures or events is not correctly paired with its role in locomotion?
a. groundwater pollution
b. erosion the threat of carbon monoxide
c. poisoning surface
d. water pollution
The annelid structure or event that is not correctly paired is groundwater pollution. Option A
What is ground water pollution all about?Groundwater pollution is not a structure or event that is involved in annelid locomotion.
Annelids move by peristalsis, which is a wave-like contraction and expansion of the body.
This movemnt is caused by the contraction of circular and longitudinal muscles.
Groundwater pollution on the other hand is the contamination of groundwater by human activities, such as agriculture, industry, and waste disposal.
It can cause a variety of problems, including health problems, environmental damage, and economic losses.
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