What gases do scientists think may have been in the early atmosphere? *

1 answer:

7 0

The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

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Which element decreases its oxidation number in this reaction? bicl2 + na2so4 → 2nacl + biso4?

kifflom [539]

The balanced reaction is as follows;
BiCl₂ + Na₂SO₄ --> 2NaCl + BiSO₄
this is a double displacement reaction
the oxidation number of Bi is +2 in both BiCl₂ and BiSO₄
oxidation number of Cl is -1 in both BiCl₂ and NaCl
oxidation number of Na is +1 in both Na₂SO₄ and NaCl
oxidation numbers of elements in SO₄²⁻ remains the same in both compounds.Therefore the oxidation state in any of the elements in the reaction doesn't change. Neither of the elements show an increase or decrease in the oxidation numbers .
Answer for this question is no element decreases its oxidation number.

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How many grams of SO2 can be formed from 0.622 mole FeS2

Anna71 [15]

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What does the peak of a probability curve for an electron in an atom indicate?

Eduardwww [97]

The distance from the nucleus at which the electron is most likely to be found

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What is the relative rate of diffusion of hydrogen and nitrogen

vredina [299]

Answer:

2.645

Explanation:

Rate of diffusion formula:

Sqrt(mass2/mass1)

>>sqrt(14/2)

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What is a reaction mechanism

ehidna [41]

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In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical change occurs. A chemical mechanism is a theoretical conjecture that tries to describe in detail what takes place at each stage of an overall chemical reaction.

Explanation:

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