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pshichka [43]
3 years ago
9

Which of the following was not a geological clue used to support the theory of continental drift

Chemistry
2 answers:
Setler79 [48]3 years ago
8 0

Answer: Option (D)

Explanation: In order to support the theory of continental drift, evidences has been found such as, the same rock types were found in different continents. Similar plant and animal fossils have been found in different continents.

But the salt analysis from the ocean water rock samples were not a part of this theory because rocks containing similar amount of salt does not help in supporting the continental drift theory.

Thus, the correct answer is option (D).

Andrei [34K]3 years ago
4 0

The answer is:

D. Samples of ocean water.

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How many kilojoules of heat will be released when exactly 1 mole of iron, Fe, is burned to form Fe2O3 at standard state condaiti
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Answer:

412.1kJ

Explanation:

For the reaction , from the question -

4Fe (s)  +  3O₂ (g)  → 2Fe₂O₃ (s)

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In case the compound is in its standard state , enthalphy of formation is zero

Hence ,

for the above reaction ,

ΔHrxn =( 2 * Δ H° (Fe₂O₃ )) - [ ( 4 *Δ H° Fe ) + (3 * Δ H° O₂ )]

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Putting in the above equation ,

ΔH rxn = ( 2 * Δ H° (Fe₂O₃ ))  - 0

ΔHrxn =  2× - 824.2 kJ / mol = - 1648.4 kJ/mol

- 1648.4 kJ/mol  , this much heat is released by the buring of 4 mol of Fe.

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for 1 mol of Fe ,

- 1648.4 kJ/mol  / 4 = 412.1kJ

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