3. the closeness of a measurment to its true value is a measure of its ____ ?

Ionic compounds are made up of particles that are arranged in a repeating pattern. Therefore, the correct option is option C.

A specific class of chemical compound known as an ionic compound is created when two or more atoms share electrons. It is made up of anions, which are negatively charged ions, and cations, which are positively charged ions. Most frequently, ionic compounds are created when a metal interacts with a non-metal. The non-metal atom receives one or more electrons to become an anion during this reaction, whereas the metal atom loses one or more electrons to become a cation. The development of a stable ionic compound happens as a result of the electrostatic forces that draw these oppositely charged ions to one another.

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The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

What is Combined gas law?

Combinedgas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

• Initial volume V₁ = 220.0mL = 0.22L

• Initial pressure P₁ = 105kPa = 1.03627atm

• Initial temperature T₁ = 275K

• Final volume V₂ = 95.0mL = 0.095L

• Final temperature T₂ = 310K

• Final pressure P₂ = ?

To calculate the new temperature of the gas, we substitute our given values into the equation above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = (P₁V₁T₂) / V₂T₁

P₂ = ( 1.03627atm × 0.22L × 310K ) / ( 0.095L × 275K )

P₂ = 70.673614LatmK / 26.125LK

P₂ = 2.705atm

P₂ = (2.705 × 101.325)kPa

P₂ = 274 kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

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Answer: True

Explanation: An ionic bond is formed when an element completely transfers its valence electron to another element.

Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.

The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element.

This bond is formed between a electropositive metal and a electronegative non-metal .

Final answer:

Ionic bonds result from high electronegativity differences. True.

Explanation:

Ionic bonds result from high electronegativity differences. True. An ionic bond is formed when one atom, usually a metal, transfers one or more electrons to another atom, typically a nonmetal, resulting in the formation of ions with opposite charges. Electronegativity is the tendency of an atom to attract a shared pair of electrons in a covalent bond. When there is a high electronegativity difference between two atoms, one atom will strip electrons away from the other, leading to the formation of ionic bonds.

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Answer:

B.

Explanation:

Hello,

The solubility of HgS is increased by adding due to common ion effect which consists on the effect that the higher solubility of has over the HgS as the sulfur-based ions modify the solubility product. In such a way, by adding the sulfate, the equilibrium will be shifted rightwards, therefore the solubility is increased.

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