In acidic solution,<u> [H₃O ] > [OH⁻]. </u> The correct option is C.
<h3>What is hydronium and hydroxide ion?</h3>
Hydronium ion is the simplest form of oxonium ion, and it is derived from the protonation of water. It is produced by dissolving the Arrhenius acid in water.
Hydroxide ion is a diatomic anion formed with oxygen and hydrogen with single covalent bond.
The concentration of hydronium ions in an acidic aqueous solution will be higher than the concentration of hydroxide (OH-) ions.
Thus, the correct option is C, <u>[H₃O ] > [OH⁻].</u>
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Explanation:
The given data is as follows.
Heat of vaporization () = 45.4 kJ/mol
Specific heat () = 0.903
Let us assume the alcohol given is and its mass is 1.12 g. Also, mass of aluminium block is 73.0 g.
First, calculate the moles of alcohol () as follows.
No. of moles alcohol =
=
= 0.0186 mol
So, heat absorbed by the alcohol () = heat lost by aluminium ()
=
12.71 =
Thus, we can conclude that the final temperature of the block is 12.3^{o}C[/tex].
You will need Periodic Table for this problem.
As we know, the number of protons specifies Atomic number. So, the atomic number for this element is 19.
Now, element having 19 protons must have 19 electrons, So, writing electronic configuration for 19 electrons,
1s², 2s², 2p⁶, 3s², 3p⁶, 4s¹
So, valence shell is 4, means element is present in 4rt period. And number of electrons in 4rth shell are 1. Means element belong to group 1.
Take periodic table go to period 4 and group 1. Its Potassium (K).
The greater the angle, the more of the moon we see illuminated.
<h3>How does the value of the angle correlate with the appearance of the moon?</h3>
The moon is a large celestial body which revolves around the earth. The moon is attracted to the earth and remains in its orbit around the earth due to the gravitational forces of attraction between the moon and the earth.
The appearance of the moon has eight phases which area;
- new Moon,
- waxing crescent,
- first quarter,
- waxing gibbous,
- full Moon,
- waning gibbous,
- third quarter and
- waning crescent
The angle between the Sun and the moon correlates to its appearance.
The greater the angle, the more of the moon we see illuminated.
In conclusion, the moon is a celestial body which revolves around the earth.
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Note that the complete question is:
Describe how the value of the angle correlates with the appearance of the moon.