CHEMISTRY HIGH SCHOOL

Which end of the H-F molecule will be partially positive?neither end
the fluorine end
both ends
the hydrogen end

Answers

Answer 1
Answer:

Answer:

the hydrogen end

Explanation:

In H - F molecules there is a charge separation. Hydrogen has partial positive charge on them and Fluorine has a partial negative charge on it.

  • The bonds between H - F molecule is a covalent bond.
  • In this bond, both atoms share their electrons to attain a stable configuration
  • But the electrons are not shared equally.
  • Fluorine is more electronegative compared to the hydrogen.
  • Fluorine therefore, attracts the shared electrons more closely to itself.
  • This makes fluorine more negative and hydrogen positive.

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What are 3 things an Apple, Knife and Mirror have in common?

Answers

1)They are all take up space.
2)They all have mass.
3)They are all solids.

Because of 1 and 2, they are all matter.

How does temperature, pressure and surface area affect the dissolving process

Answers

If I am correct, yes. As I was told in chemistry, the surface area affects the dissolving of the "sugar". If you put regular Surat in a hot cup of coffee, it will dissolve at a quick pace, but what if you put the same amount of sugar in the same amour of coffee, but the sugar was fine powder? It would dissolve even faster since it has more surface area. So temperature does affect the dissolving. Hope this helps!
Temperature : - DIssolving process is fastened by increase in temperture.( directly proportional)

Pressure : -  Dissolving process is fastened by decrease in pressure.( inversely proportional)

Surface area - Dissolving process is fastened by increase in surface area. ( directly proportional)

What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3(s)? 2NH3(g) + 2O2(g) NH4NO3(s) + H2O(l)Given:
NH4NO3(s): ∆Hf = -365.56 kJ ∆Sf = 151.08 J/K.
NH3(g): ∆Hf = -46.11 kJ ∆Sf = 192.45 J/K.
H2O(l): ∆Hf = -285.830 kJ ∆Sf = 69.91 J/K.
O2(g): ∆Hf = 0.00 kJ ∆Sf = 205 J/K.

Answers

∆G =  ∆H - T∆S

NH3: ∆G = -46.11x10^3 - (298)(192.45) = -103460.1 J
O2: ∆G = 0 - (298)(205) = -61090 J
NH4NO3: ∆G = -365.56x10^3 - (298)(151.08) = -410581.84 J
H2O: ∆G = -285.830x10^3 - (298)69.91) = -306663.18 J

∆Grex = ∆Gproducts - ∆Greactants
∆Grex = (-410581.84 +  -306663.18) - (-103460.1/2 + -61090/2)
∆Grex =-634969.97 J/mol = -634.97 kJ/mol

An atom of sodium-23 (Na-23) has a net charge of +1. identify the number of protons, neutrons, and electrons in the atom. How did you determine the number of each type. Explain in completer s details.

Answers

The correct number of neutrons is 12 while the number of protons is 11. That is because if the atomic number is 23, that means it's the isotope Na-23 and the atomic number is the sum of protons and neutrons. There are 11 protons as it can be seen on the periodic system. The number of electrons is 10 because it is positively charged, meaning that there's one electron fewer than the usual.

Protons: 11 - Neutrons: 12 - Electrons: 11.  By analyzing the atomic number, mass number, and net charge, we can determine the number of protons, neutrons, and electrons in the sodium-23 atom.

The sodium-23 atom (Na-23) has a net charge of +1, which means it has one more proton than electrons. To determine the number of protons, neutrons, and electrons in the atom, we need to look at its atomic number and mass number.

The atomic number of an element represents the number of protons in its nucleus. Since the net charge of the sodium-23 atom is +1, it means there is one more proton than electrons. Therefore, the number of protons in the sodium-23 atom is 11.

The mass number of an atom is the sum of its protons and neutrons. To find the number of neutrons, we subtract the number of protons (atomic number) from the mass number. In this case, the sodium-23 atom has a mass number of 23, and since it has 11 protons, we can calculate the number of neutrons:

Mass number - Atomic number = Number of neutrons
23 - 11 = 12 neutrons

Lastly, to find the number of electrons, we need to consider the net charge. Since the sodium-23 atom has a net charge of +1, it means it is missing one electron to become neutral. Therefore, the number of electrons in the sodium-23 atom is 11.

In summary:
- Protons: 11
- Neutrons: 12
- Electrons: 11

By analyzing the atomic number, mass number, and net charge, we can determine the number of protons, neutrons, and electrons in the sodium-23 atom.

To know more about neutrons:

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How many molecules is 1.50 moles of CO2

Answers

Answer:

The answer to your question is 9.034 x 10²³ molecules

Explanation:

Data

number of molecules = ?

number of moles = 1.50

Process

To solve this problem, use Avogadro's number. This number relates 1 mol of a substance to 6.023 x 10²³ molecules.

                          1 mol of CO₂ ---------------  6.023 x 10 ²³ molecules

                          1.5 moles of CO₂ ----------   x

                                x = (1.5 x 6.023 x 10²³) / 1

                                x = 9.034 x 10²³ molecules

Which interaction produces dispersive forces by creating temporary dipoles that induce dipoles in other molecules?

Answers

This type interaction is called the London dispersion force. These are temporary forces that happens when electrons of two adjacent atoms occupy positions that will result to temporary dipoles. The constant motion of the electrons will cause to form an instantaneous dipole when the electrons are unsymmetrically distributed. These forces are present in nonpolar substances.
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