The Great Migration during World War I refersto the movement of
(1) factory workers from the Northeast to the
Sun Belt
(2) communists deported to Russia as
undesirable aliens
(3) African Americans to northern cities to find
work
(4) refugees fleeing from eastern Europe to the
United States

Answers

Answer 1

Answer:

The Great Migration during World War I refers to the movement of African Americans to northern cities to find work. Therefore, option (3) is correct.

What is Great migration?

The Great Migration was the movement of millions of African Americans moved from the rural Southern United States to the urban Northeast, Midwest, and West. The great migration was caused by the poor economic conditions for African American people.

The historic change brought by the migration was fueled because the migrants moved to the largest cities in the United States such as New York City, Chicago, Los Angeles, Philadelphia, Cleveland, and Washington, D.C. at a time when these cities had a central social, political, cultural and economic influence over the United States.

African Americans established effective communities of their own. Therefore the Great migration movement was actually sending African Americans to northerncities to find work.

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Answer 2

Answer: The Great Migration during WW 1 refers to the movement of African Americans to Northern Cities to find work.

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The cell potential of the following electrochemical cell depends on the gold concentration in the cathode half-cell:________ Pt(s)
|H2(g,1atm)
|H+(aq,1.0M)
|Au3+(aq,?M)
|Au(s).
What is the concentration of Au3+ in the solution if Ecell is 1.23 V ?

Answers

Answer: The concentration of $Au^(3+)$ is $1.096* 10^(-6)$

Explanation:

The given chemical cell follows:

$Pt(s)|H_2(g,1atm)|H^+(aq,1.0M)||Au^(3+)(aq,?M)|Au(s)$

Oxidation half reaction: $H_2(g,1atm)\rightarrow 2H^(+)(aq,1.0M)+2e^-;E^o_(2H^(+)/H_2)=0.0V$ ( × 3)

Reduction half reaction: $Au^(3+)(aq,?M)+3e^-\rightarrow Au(s);E^o_(Au^(3+)/Au)=1.50V$ ( × 2)

Net cell reaction: $3H_2(g,1atm)+2Au^(3+)(aq,?M)\rightarrow 6H^(+)(aq,1.0M)+2Au(s)$

Oxidation reaction occurs at anode and reduction reaction occurs at cathode.

To calculate the $E^o_(cell)$ of the reaction, we use the equation:

$E^o_(cell)=E^o_(cathode)-E^o_(anode)$

Putting values in above equation, we get:

$E^o_(cell)=1.50-(0.0)=1.50V$

To calculate the EMF of the cell, we use the Nernst equation, which is:

$E_(cell)=E^o_(cell)-(0.059)/(n)\log ([H^(+)]^6)/([Au^(3+)]^2)$

where,

$E_(cell)$ = electrode potential of the cell = 1.23 V

$E^o_(cell)$ = standard electrode potential of the cell = +1.50 V

n = number of electrons exchanged = 6

$[H^(+)]=1.0M$

$[Au^(3+)]=?M$

Putting values in above equation, we get:

$1.23=1.50-(0.059)/(6)* \log(((1.0)^6)/([Au^(3+)]^2))$

$[Au^(3+)]=-1.0906* 10^(-6),1.096* 10^(-6)$

Neglecting the negative value because concentration cannot be negative.

Hence, the concentration of $Au^(3+)$ is $1.096* 10^(-6)$

When 50.0 g of silicon dioxide is heated with an excess of carbon, 32.2 g of silicon carbide is produced. SiO2 (s) + 3 C (s) → SiC (s) + 2 CO (g) What is the percent yield of this reaction?grams of hydrogen gas will be produced?

Answers

Answer:

0.97g

Explanation:

Answer:

0.97g

Explanation:

Where are the alkali metals and the halogens located on the periodic table?

Answers

Alkali: Group 1(I A). Halogens: group 17 (VII A)

LEWIS DOT
Mg3 N2 how do I get my answer

Answers

Final answer:

The Lewis dot structure for Mg3N2 represents the ionic bonding between magnesium and nitrogen. Each magnesium atom donates its 2 valence electrons to nitrogen, as represented by zero dots around each Mg and eight around each N.

Explanation:

The student is asking about the Lewis dot structure of Mg3N2, which is commonly known as magnesium nitride. The Lewis dot structure is a graphical representation of the molecule that shows how the electrons are arranged among the atoms of the molecule.

To draw the Lewis dot structure for magnesium nitride, follow these steps:

Magnesium (Mg) has 2 valence electrons, and there are 3 Mg atoms, so in total there are 6 valence electrons from Mg.
Nitrogen (N) has 5 valence electrons, and there are 2 N atoms, so in total there are 10 valence electrons from N.
In Mg3N2, Mg donates its 2 electrons to fill the octet of N, and N accepts these electrons.
After this, each Mg atom is surrounded by zero dots and each N atom is surrounded by eight dots.

This process represents the Ionic bonding in Mg3N2.

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Which of the following is an acid-base neutralization reaction? (1 point) Sn + 2HBr yields SnBr2 + H2 HCl + KOH yields KCl + H2O 2AlCl3 + 3Ca(OH)2 yields 2Al(OH)3 + 3CaCl2 2C2H6 +7O2 yields 4CO2 + 6H2O

Answers

Answer:

Explanation:

Sn + 2HBr = SnBr₂ + H₂

Here HBr is an acid but Sn is not a base . It is a metal . So it is not an acid - base reaction .

HCl + KOH = KCl + H₂O

HCl is an acid and KOH is a base so it is an acid base reaction.

2AlCl₃ + 3Ca(OH)₂ = 2Al(OH)₃ + 3CaCl₂

It is an acid base reaction . It is so because aluminium hydroxide is a lewis acid and calcium hydroxide is a base . So it is an acid base reaction .

2C₂H₆ +7O₂ = 4CO₂ + 6H₂O

It is not an acid base reaction . It is actually an example of oxidation reaction in which ethane burns in oxygen to give carbon dioxide and water.

Solids, liquids, and gases can be distinguished by their

Answers

The three states of matter are solid, liquid and gas phase. The solid has a more definite shape and volume. The particles are locked into place. It cannot be further compressed due to the bond that exists between the molecules. The kinetic energy of the molecules is close to none because the molecules are so close and so compact with each other. For liquids, it has a medium shape and volume. The particles can move or slide past each other due to the small space available for movement. It cannot be compressed further due to the repulsive forces that acts between them. The kinetic energy is medium. For gases, it has no shape and volume because the particles can move freely from one other. Their collisions are rare due to the distance between them. The kinetic energy of the molecules is high because there is room for movement. It can be compressed easily.

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