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Chemistry

1 answer:

Volgvan2 years ago

5 0

Answer:

The first one is air the second is decreases the third is water the fourth is gas and the last is liquid.

Explanation:

Hope it helps.

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Is the dissolution of borax endothermic or exothermic.

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Answer: Endothermic.

Explanation: ...

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1 year ago

Plants and animals can build up or break down rock by increasing weathering, erosion, and

alexgriva [62]

Answer:

false

Explanation:

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When a piece of solid phosphorus is added to a flask containing chlorine gas, heat is evolved?

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2 years ago

Write equations that show the processes that describe the first, second, and third ionization energies for a gaseous gadolinium

Inessa [10]

Answer:

Gd(g) → $Gd^{+}(g) + e^{-}$ , $Gd^{+}(g)$ → $Gd^{2+}(g) + e^{-}$ , $Gd^{2+}(g)$ → $Gd^{3+}(g) + e^{-}$

Explanation:

Ionization energy is the energy required to remove an electron from a gaseous atom or ion.

The first ionization energy is the energy required to remove the valence electron(outermost) from a neutral atom:

Gd(g)→ $Gd^{+}(g) + e^{-}$

The second ionization energy is the energy required to remove next/second electron from $x^{+}$ ion. The second ionization energy is always higher than the first: