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2 years ago

The United States was successful in containing communism in what country? Vietnam

Chemistry

2 answers:

Sloan [31]2 years ago

8 0

Answer:

North Korea (The Korean War).

Explanation:

When Korea was liberated from Japanese control at the end of the Second World War, the United States and the Soviet Union agreed temporarily to divide Korea at the 38th parallel of latitude north of the equator. This division resulted in the formation of two countries: communist North Korea (supported by the Soviets) and South Korea (supported by the United States).

Volgvan2 years ago

4 0

Answer:

The United States was successful in containing communism in South Korea, since it prevented its expansion into South Korea through its participation in the Korean War.

Explanation:

The Korean War was fought between 1950 and 1953 between communist North Korea and prowest South Korea. North Korea was militarily supported in the war by the People's Republic of China and the Soviet Union. South Korea was supported by the United Nations and received military assistance from various UN countries, led by the United States.

The direct cause of the conflict was the division of the Korean territory, that was annexed by Japan in 1910 after World War II. The northern part was occupied by the Soviet Union and the southern part by the United States. The 38th parallel was taken as the dividing line. The division would be temporary, but both parts soon developed into their own entities. The northern part became communist and the south became democratic. There was soon no longer a question of a peaceful merger of the two parts, and both parts considered using military force to conquer the other part.

After various border conflicts, the war started on June 25, 1950 with an invasion of North Korea on the south and ended on July 27, 1953 with a ceasefire, without a real winner having emerged. The new dividing line came close to the 38th parallel.

The most important result of this war was the rejection of communism from South Korea, which constituted itself as a main democratic force in Asia, along with Japan, thanks to the American support in the conflict.

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Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite mineral rhodochrosite, involves

hjlf

This is an incomplete question, here is a complete question.

Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite mineral rhodochrosite, involves a two-step process. In the first step, manganese (II) carbonate and oxygen react to form manganese (IV) oxide and carbon dioxide:

$2MnCO_3(s)+O_2(g)\rightarrow 2MnO_2(s)+2CO_2(g)$

In the second step, manganese (IV) oxide and aluminum react to form manganese and aluminum oxide:

$3MnO_2(s)+4Al(s)\rightarrow 3Mn(s)+2Al_2O_3(s)$

Write the net chemical equation for the production of manganese from manganese (II) carbonate, oxygen and aluminum. Be sure your equation is balanced.

Answer : The net chemical equation for the production of manganese is:

$6MnCO_3(s)+3O_2(g)+8Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

Explanation :

The given two chemical reactions are:

(1) $2MnCO_3(s)+O_2(g)\rightarrow 2MnO_2(s)+2CO_2(g)$

(2) $3MnO_2(s)+4Al(s)\rightarrow 3Mn(s)+2Al_2O_3(s)$

First we are multiplying reaction 1 by 3, and reaction 2 by 2, we get:

(1)

(2) $6MnO_2(s)+8Al(s)\rightarrow 6Mn(s)+4Al_2O_3(s)$

Now we are adding both the reactions, we get the overall chemical reaction.

$6MnCO_3(s)+3O_2(g)+6MnO_2(s)+8Al(s)\rightarrow 6MnO_2(s)+6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

The $MnO_2$ is common on both side, by cancelling it, we get:

The net chemical equation for the production of manganese is:

$6MnCO_3(s)+3O_2(g)+8Al(s)\rightarrow 6CO_2(g)+6Mn(s)+4Al_2O_3(s)$

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3 years ago

Various pieces of safety equipment are used in the lab to provide protection against injury. What piece of lab safety equipment

Elina [12.6K]

Various pieces of safety equipment are used in the lab to provide protection against injury. However, the lab safety equipment which is least likely to be used when proper eye goggles are being worn is the eye wash station. If this question has the same choices as the ones posted before, the answer is letter C. eye wash station.

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3 years ago

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masha68 [24]

Answer:

A . 6.3 In a healthy pond, the temperature is 16°C (61°F). What is the most likely pH of this pond

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2 years ago

Provide an example of a Food Chain.

VikaD [51]

Answer: Diamond is the name ^-^

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3 years ago

4. Which of the following statements explains the cause of lanthanide contraction?

yawa3891 [41]

Answer:

B. PROTONS EXHIBIT STRONGER PULL ON OUTER f ORBITALS

Explanation:

Lanthanide contraction is the greater than normal decrease in the ionic radius of the lanthanide series from atomic number 57 to atomic number 71. This decrease is rather not expected of the ionic radii of these elements and they result in the greater decrease in the subsequent series of the lanthanides from the atomic number 72. The cause of which is as a result of the poor shielding effects of the nuclear charge around the electrons of the f orbitals. So therefore, protons are strongly pulled out of the 4f orbital and as a result of the poor shielding effect which causes the electrons of the 6s orbitals to be drawn more closer to the nucleus and hence resulting in a smaller atomic radii. It is worthy to note that the shielding effects of the inner electrons decreasing from s orbital to the f orbital; that is s > p > d > f. So from the decrease in the shielding effects from s to the f orbitals, lanthanide contraction results from the inability of the orbitals far away from s like the 4f orbiatls to shield the outermost shells of the lanthanide elements. So the cause of lanthanide contraction is the action of the protons which strongly pull the electrons of the f orbitals because of the poor shielding effects due to the distance of this orbital from the nucleus.

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