How does Silicon shape our technological reality
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Which of the following sets of characteristics describe what we know about the inner planets?Select one: a. They are closest to the sun, have many moons, and include ring systems. b. They are closest to the sun, have many moons, and include ring systems. c. They have rocky surfaces, no rings, and few or no moons. d. They have rocky surfaces, ring systems, and are larger in size.
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Which formulas represent one ionic compound and one molecular compound?
Which best describes the oxidizing agent in this reaction? Cl2(aq) + 2Br(aq) --> 2Cl(aq) + Br2(aq)
b. 0 °C
c. 100 °C
d. 120 °C
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(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
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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:
Hemoglobins allow the red blood cells to carry oxygen and iron.
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Answer:
proton and neutron
Explanation:
proton is positive while neutron is neutral so they can live togher
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Answer:
≈ 0.70 g/cm³ (answer rounded up to 2 decimal places)
Explanation:
The mass of empty cylinder is 20g
The mass of water filling the cylinder = 30g - 20g = 10g
The mass of unknown liquid filling the cylinder = 27g - 20g = 7g
Density of water = 997 kg/m³
Converting this density to g/cm³ we get;
1kg = 1000g , 1m³ = 1000000cm³
So density = g/cm³ = 0.997 g/cm³
So the volume of water occupied by 10g is;
10 × 0.997 = 9.97 cm³
This volume is also occupied by 7g of the unknown liquid.
Density = mass/volume
Density of the unknown liquid = 7g ÷ 9.97cm³ = 0.702106319 g/cm³ ≈ 0.70 g/cm³ (answer rounded up to 2 decimal places)
be different about their atoms? (4 points)
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On the periodic table, argon has an average atomic weight of 39.948 amu. This number is really near 40. This suggests that Ar-40 is the isotope of argon (Ar) that is most prevalent in the natural world.
What characteristics do argon-36, argon-38, and argon-40 share?
If all three argon atoms are neutral, they would each contain 18 protons and 18 electrons. In comparison to one another, the three isotopes will each have a distinct number of neutrons (18, 20, and 22 neutrons respectively).
Why is potassium a 39 positioned before argon, atomic number 40, in the current periodic table?
Atomic number, not atomic mass, is used to categorise the elements. As the atomic number of argon (18) is less than that of potassium (19)
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