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Hatshy [7]
3 years ago
6

el oro es un metal que resistente a la corrosion, por esta razon razon se emplea en joyeria y su pureza mide por lo quilates que

contiene, el oro puro tiene 24 quilates, si una pulsera de oro de 18 quilates pesa 40g y tiene un precio comercial de 2817.70, ¿Cuanto vale 1 mol de oro puro?
Chemistry
1 answer:
nalin [4]3 years ago
6 0
The answer is 40.0 it hope im right
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Decide if the following statements regarding Intermolecular forces are True or False. H2S will have a higher boiling point than
igomit [66]

Answer:

1. True

2. False

3. True

4. False

5. True

Explanation:

The intermolecular forces are the forces that put together the molecules in a substance. When the molecule is polar, it will have partial charges in the atoms, so the molecules will be attracted by electrostatic force, such as an ionic compound (but less effective). The force is called dipole-dipole.

When the molecule is nonpolar, to be together, a partial charged is induced, and then they will be attracted. Because it is induced, the force is weaker then dipole-dipole, and it's called dipole-induced-dipole-induced.

When a polar molecule is formed between hydrogen and an extremely electronegativity element(N, O, and F), the dipole-dipole bond will be stronger, so it has a special name: hydrogen bond.

As stronger is the force, as difficult is to break it, so more difficult will be to boil it. Then:

1. H₂S is polar, so it has dipole-dipole forces, and F₂ is nonpolar, so it has dipole-induced-dipole-induced forces, then H₂S has a higher boiling point.

2. HF has a hydrogen bond, and HBr a dipole-dipole force, so HF has a higher boiling point, because of that, at the same temperature, HF will need a higher pressure to boil, so the vapor pressure (the pressure necessary to boil it) of it will be higher than at HBr.

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4. KCl is an ionic compound, which has stronger forces than the covalent compounds, so KCl will have a higher pressure vapor.

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4 0
3 years ago
a sample of gas with a volume of 30.0 ml at 25.0 °c is heated to 50.0 degrees celsius. what is the new volume of the gas?
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Explanation :

Charles' Law : It states that volume of the gas is directly proportional to the temperature of the gas at constant pressure and number o moles of gas.

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\frac{V_1}{T_1}=\frac{V_2}{T_2}

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V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=30.0mL\\T_1=25.0^oC=(25.0+273)K=298K\\V_2=?\\T_2=50.0^oC=(50.0+273)K=323K

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