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2 years ago

11,12,13,14 please...

Chemistry

1 answer:

jekas [21]2 years ago

5 0

11. D
12.C
13. For 13 i would say B but not so sure
14. A

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Is this showing a lunar or solar eclipse? Explain what is happening from the viewpoint of Earth.

GalinKa [24]

Answer:

Solar eclipse

Explanation:

A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. Such alignment coincides with a new moon indicating the Moon

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3 years ago

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Help!!! I need ur help! If u help me I’m going to be so happy. The question is so tricky for me and I don’t know it. If u help m

Mekhanik [1.2K]

I take that the insects remain constant no matter what happens to the frogs (which the frogs eat presumably). So a constant food supply for the frogs is not the problem.

The line for the alligators increases over time. It their numbers increase, the frogs are in trouble. The alligators will pursue lunch with determined single mindedness and there are more of them around.

So the frogs should decrease. Their natural enemy is the alligator and alligators won't go after insects. It's not worth their time.

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3 years ago

An unbalanced chemical equation is shown:

Sati [7]

Answer:

1. Two to decompose

Explanation:

It's going to be a decomposition so you can eliminate answers 3 and 4. It is a decomposition because it is splitting apart. Then you can figure out that it is going to be two instead of four by balancing the equation

H2O2 → 2H2O + O2

$2H_{2}O_{2} → 2H_{2}O + O_{2}$

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3 years ago

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Which one of these elements is a liquid at room temperature.<br>B<br>Sr<br>Hg<br>Sb

kipiarov [429]

Use Socratic dukforososieir

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3 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:

$Gd^{+}$ (g) → $Gd^{2+}(g) + e^{-}$

The third ionization energy is the energy required to remove third electron from $x^{2+}$ ion:

$Gd^{2+}$ (g) → $Gd^{3+}(g) + e^{-}$

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3 years ago