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3 years ago

The state of water is determined solely by the conditions of _____.

Chemistry

2 answers:

Arlecino [84]3 years ago

7 0

Answer:

The state of water is determined solely by the conditions of pressure and temperature.

Explanation:

Effect of Temperature:

Temperature has direct effect on the kinetic energy of water molecules. Greater the Temperature greater is the K.E of molecules and lesser is the intermolecular forces between molecules. Therefore, at temperature below 0 °C water exists in solid state, at temperature in between 0 and 100 °C it exists in liquid state and (at sea level) and above 100 °C it exists in vapor state.

Explanation:

Elenna [48]3 years ago

6 0

<h3>Answer:</h3>

The state of water is determined solely by the conditions of <u>pressure and temperature</u>.

<h3>Explanation:</h3>

Effect of Temperature:

Effect of Pressure:

The state of water is also influenced by the external pressure. For example, water can be converted into gas phase by reducing the external pressure (this technique is used in vacuum distillation where solvents are evaporated at temperatures lower than their boiling points) and also, the water can remain in liquid state even above 100 °C if the external pressure is increases (this method is being utilized in daily use pressure cookers).

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In the Hall-Heroult process, a large electric current is passed through a solution of aluminum oxide Al2O3 dissolved in molten c

gtnhenbr [62]

Answer:

1.13 × 10⁶ g

Explanation:

Let's consider the reduction of aluminum (III) from Al₂O₃ to pure aluminum.

Al³⁺ + 3 e⁻ → Al

We can establish the following relations:

1 Ampere = 1 Coulomb / second
The charge of 1 mole of electrons is 96,468 c (Faraday's constant)
1 mole of Al is produced when 3 moles of electrons circulate
The molar mass of Al is 26.98 g/mol.

The mass of aluminum produced under these conditions is:

$90.0 s \times \frac{1s}{620c} \times \frac{96,468c}{1mole^{-} } \times \frac{3mole^{-}}{1molAl} \times \frac{26.98gAl}{1molAl} =1.13 \times 10^{6} g Al$

6 0

3 years ago

Consider four different samples: aqueous LiF, molten LiF, aqueous AgF, and molten AgF. Current run through each sample produces

meriva

Answer:

Molten LiF forms solid lithium

Aqueous AgF forms solid silver

Aqueous LiF forms hydrogen gas.

Explanation:

Aqueous solution of $LiF$ has water molecule, there will be competing will be two competing cations for reduction, while $Li^{+}(aq)$ and $H^{+}(aq)$ .However the reduction potential of $H^{+}(aq)$ is more than that of the $Li^{+}(aq)$ . Hence, $H^{+}(aq)$ reduced to hydrogen gas.

Molten $LiF$ has only solid form of $LiF$ and $Li^{+}(aq)$ reduced to form $Li$ solid.

An aqueous form of $AgF$ contains water molecules.there will be competing will be two competing cations for reduction, while $Ag^{3+}(aq)$ and $H^{+}(aq)$ .However the reduction potential of $Ag^{3+}(aq)$ is more than that of the $H^{+}(aq)$ . Hence, $Ag^{3+}(aq)$ reduced to solid silver.

Therefore, Molten LiF forms solid lithium

Aqueous AgF forms solid silver

Aqueous LiF forms hydrogen gas.

6 0

3 years ago

1. A helium-filled balloon had a volume of 8.50 L on the ground at 20.0°C and a

maw [93]

Answer:

133.74 L

Explanation:

First we <u>convert the given pressures and temperatures into atm and K</u>, respectively:

750.0 Torr ⇒ 750/760 = 0.9868 atm

20°C ⇒ 20+273.16 = 293.16 K

40°C ⇒ 40+273.16 = 313.16 K

Then we<u> use the PV=nRT formula to calculate the number of moles of helium in the balloon</u>, using<em> the data of when it was on the ground</em>:

0.9868 atm * 8.50 L = n * 0.082 atm·L·mol⁻¹·K⁻¹ * 293.16 K

n = 2.866 mol

Then, knowing the value of n, we <u>use PV=nRT once again, this time to calculate V</u> using <em>the data of when the balloon was high up:</em>

0.550 atm * V = 2.866 mol * 0.082 atm·L·mol⁻¹·K⁻¹ * 313.16 K

V = 133.74 L

5 0

3 years ago

8th Grade Checkpoint 1

Bad White [126]

Answer:

Antimony, Sb, an atom contains 51 protons inside the nucleus and 51 electrons outside the nucleus.

Explanation:

Option “C” is correct because protons exist inside the nucleus and electrons exist outside the nucleus. Moreover, Sb has the number of protons 51 that is found in the nucleus and it has 51 electrons that exist outside the nucleus. However, the nucleus contains protons and neutrons while electrons exist outside of the nucleus. All the given options do not follow such condition therefore, all the statements are incorrect accept option 3rd.

8 0

3 years ago

Which of the elements below has the largest electronegativity? Na, Mg, S, P?<br> HURRY!!!

just olya [345]

Answer:

Electronegativities generally decrease from top to bottom within a group due to the larger atomic size.

Of the main group elements, fluorine has the highest electronegativity (EN= 4.0) and cesium the lowest (EN=0.79).

Explanation:

4 0

3 years ago

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