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siniylev [52]
3 years ago
7

Which phrase provides the best definition of a landform region?

Chemistry
2 answers:
Liono4ka [1.6K]3 years ago
4 0

Answer:

a large area where the topography is made up of one landform .

Explanation:

satela [25.4K]3 years ago
3 0
The answer would be A
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In a reaction vessel, 17.6 g of solid chromium(III) oxide, Cr2O3, was allowed to react with excess carbon tetrachloride in the f
notsponge [240]

Answer:

72.53% is the yield of CrCl3

Explanation:

Given

Reaction:

Cr2O3(s) + 3 CCl4(l) → 2 CrCl3(s) + 3 COCl2(aq)

CCl4 is in excess and 17.6g  Cr2O3 present

The reaction yields 26.6g of CrCl3

To Find:

% yields of the reaction

Also given

Molar mass of CrCl3 = 158.35g/mol

Molar mass of Cr2O3 = 152.00 g/mol

By the stoichiometry of the reaction

1 mole of Cr2O3 gives  2 moles of CrCl3

0r

1 x1 52 g of Cr2O3 gives 2x 158.35 g of CrCl3

= 1 52 g of Cr2O3 gives 316.70 g of CrCl3

    17.6 g of Cr2O3 gives  (17.6÷152) × 316.70 g CrCl3

= 36.67 g CrCl3

but actual yield is only 26.6g

so % yield is (26.6 ÷÷ 36.67) × 100

= 72.53% is the yield of CrCl3

8 0
3 years ago
URGENT LOOK AT PICTURE<br>look at the thing and choose all that matches ​
kozerog [31]

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E

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E

E

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E

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E

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BRAINLIEST PLEASE

5 0
3 years ago
Predict the sign of the entropy change, ΔS, for the following processes. Explain the reason for each of the predictions.
Nastasia [14]

The sign of the entropy change, ΔS, for the following processes include:

  • I2 (s) + ½ Cl2 (g) ← → ICl (g) - positive
  • 3 Ag (s) + 4 HNO3 (aq) → 3AgNO3 (aq) + NO (g) + 2 H2O (l) - positive
  • Cl2 (g) → Cl2 (l) - negative
  • C5H12 (g) + 8 O2 (g) → 5 CO2 (g) + 6 H2O (l) - negative

What is Entropy?

This is referred to the degree of randomness or disorderliness of a system and is denoted as S.

Entropy change is usually positive when solid or liquid reactant is converted into gas product and vice versa.

Read more about Entropy here brainly.com/question/419265

#SPJ1

6 0
2 years ago
Marking brilliant for answers
Alekssandra [29.7K]

Answer:

The first option.

Explanation:

Warm solvent and stirring promote quick dissolving . Also with small crystals more of the surface is in contact with the solvent than with  large crystals.

5 0
3 years ago
Read 2 more answers
Help on science please!! Will bark brainliest!
jok3333 [9.3K]

Aphelion in miles =94290301

Perihelion in miles = 91200281

Explanation:

To convert km in mile we use the multiply the distance in km with 0.62, because there are 0.62 miles in 1 km.

Aphelion in miles = aphelion in km × 0.62

Aphelion in miles = 152081132 × 0.62

Aphelion in miles =94290301

Perihelion in miles = perihelion in km × 0.62

Perihelion in miles = 147097229 × 0.62

Perihelion in miles = 91200281

Learn more about:

conversion of units

brainly.com/question/5725710

brainly.com/question/5956394

#learnwithBrainly

7 0
3 years ago
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