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12345 [234]
3 years ago
6

Which fact would best help a reader understand the context of Langston Hughes's poetry? Hughes wrote both poems and plays about

the African American experience. Hughes planned to study engineering when he entered college. Hughes lived in a neighborhood of working-class African Americans. Hughes liked to travel throughout the country when he was still a young man.
SAT
2 answers:
hodyreva [135]3 years ago
8 0

Correct answer choice is :

C) Hughes lived in a neighborhood of working-class African Americans

Explanation:

Langston Hughes composed a myriad of dramas, short novels, and articles. He is essentially recognized for his poetry, particularly the lyrics he wrote while the Harlem Renaissance. Scholars and analysts always relate to him the “African American Poet Laureate of Democracy,” forming a similarity between Hughes and Walt Whitman. Whitman, like Hughes, wrote about the daily biographies of American men and women using easy language to summon great melodies in a relocatable way.

siniylev [52]3 years ago
4 0
C <span>Hughes lived in a neighborhood of working-class African Americans.</span>
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Determine the empirical formula of a compound containing 47. 37 grams of carbon, 10. 59 grams of hydrogen, and 42. 04 grams of o
Effectus [21]

Considering the definition of empirical formula, the empirical formula is C₃H₈O₂ and the molecular formula is C₉H₂₄O₆.

<h3>Definition of empirical formula</h3>

The empirical formula is the simplest expression to represent a chemical compound, which indicates the elements that are present and the minimum proportion in whole numbers that exist between its atoms, that is, the subscripts of chemical formulas are reduced to the most integers. small as possible.

<h3>Empirical formula in this case</h3>

In this case, you have:

  • Carbon (C): 47.37 grams
  • Hydrogen (H): 10.59 grams
  • Oxygen (O):  42.04 grams

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

  • Carbon (C): \frac{47.37 grams}{12 \frac{g}{mole} }= 3.95 moles
  • Hydrogen (H): \frac{10.59 grams}{1 \frac{g}{mole} }= 10.59 moles
  • Oxygen (O):  \frac{42.04 grams}{16 \frac{g}{mole} }= 2.63 moles

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

  • Carbon (C): \frac{3.95 moles}{2.63 moles }= 1.5
  • Hydrogen (H): \frac{10.59 moles}{2.63 moles }= 4
  • Oxygen (O):  \frac{2.63 moles}{2.63 moles }= 1

Finally, since in the empirical formula the numbers of moles must be expressed in whole numbers, the ratio of atoms is multiplied by some number with which everything is obtained in simple whole numbers (in this case by 2):

  • Carbon (C): 1.5× 2= 3
  • Hydrogen (H): 4× 2= 8
  • Oxygen (O):  1× 2= 2

Therefore the C: H: O mole ratio is 3: 8: 2

Finally, the empirical formula is C₃H₈O₂.

<h3>Molecular formula</h3>

To obtain the molecular formula you must relate its molecular weight (PMc) with the molecular weight of the empirical formula (PMfe).

PMfe= PM (C₃H₈O₂)= 76 g/mole

The molar mass of the compound (PMc) was determined to be 228.276 g/mol. Dividing this mass PMc by the molar mass of the empirical formula PMfe gives:

228.276 g/mol ÷ 76 g/mole= 3

This means that in the molecular formula there are 3 unit formulas (empirical formulas), so it is necessary to multiply the number of all atoms by 3.

Then, the molecular formula is C₉H₂₄O₆.

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2 years ago
When Elijah went to the top of Mount Carmel to pray, the first evidence that God was about to fulfill His promise to send rain w
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It was in the shape of a mans hand. As a christian i know this, but i dont think it was the size of a mans hand, or it'd be hard to see.

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3 years ago
What is the universal language in the world
iris [78.8K]

Answer:

english

Explanation:

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The bible tells us that god is
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Answer:

The bible tells us that god is the savior and the creator of all life:)

Explanation:

I'm christian and read the whole bible already:)

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3 years ago
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A diagram of chloroplast stroma and thylakoid lumen showing chemical energy, ferredoxin, ferredoxin-N A D p reductase, A D P syn
Diano4ka-milaya [45]

Given the process of photosynthesis is used to produce ATP in the presence of light and water, the<u> first, second, and fourth options</u> are what need to be changed.

Photosynthesis is the process by which certain organisms transform light energy into chemical energy in the form of ATP. <u>The first option</u> states that CO2 should be changed to H2O, <u>which is correct</u>. This is due to the fact that photosynthesis oxidizes H2O in order to produce a molecule of oxygen.

<u>Option 2 is also correct </u>in that the diagram should show ATP instead of ADP, given that photosynthesis is used by organisms to produce ATP as the <u>primary energy product. </u>To carry out the function, the enzyme used is ATP synthase, which is what the diagram should reflect.

Finally, <u>we should also choose option 4</u>, which states that chemical energy should be switched with light energy. As previously states, photosynthesis uses light energy to produce chemical energy. Though chemical energy is produced, it is the final product and does not participate in the process,<u> light energy does. </u>

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2 years ago
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