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4 years ago

Which of the following values best classifies a bond between 2 atoms as being ionic?

Chemistry

2 answers:

Kobotan [32]4 years ago

7 0

Answer is: A. An electronegativity difference of greater than 1.7 between the atoms.

Electronegativity (χ) is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

Atoms with higher electronegativity attracts more electrons towards it, electrons are closer to that atom.

For example, in ionic salt sodium fluoride (NaF), fluorine has electronegativity approximately χ = 4 and sodium χ = 1 (Δχ = 4 - 1; Δχ = 3), fluorine attracts electron and it has negative charge and sodium has positive charge.

never [62]4 years ago

4 0

The general rule followed is that if electronegativity difference is greater than 2, then it is considered an ionic bond. An ionic bond is a type of bond characterizing a transfer of electrons within a bond. Common examples are salts which adds that ionic bonds are common between a metal and a nonmetal. Therefore, the best answer from above is letter B.

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Is baking soda an acid, base, or neutral

sergey [27]

Answer:

Baking soda is an alkaline, or base, substance. This means that when we dissolve baking soda in water, it forms an alkaline solution. For example, a 0.1 molar solution of baking soda has a pH of around 8.3. Lemon juice contains citric acid and has a pH of around 3.

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3 years ago

What describes the relationship between elements and compounds?

kompoz [17]

Answer:

B. A few elements can combine to form a compound

Explanation:

An element is a substance that cannot be chemically broken down into simpler substances. (THESE ARE IN THE PERIODIC TABLE OF THE ELEMENTS)

A compound is a substance composed of two or more elements in fixed, definite proportions.

Source: Tro Nivaldo J.. Principles of Chemistry (p. G-4). Pearson Education. Kindle Edition.

4 0

3 years ago

Which of these substances will conduct electricity? CuSO4(s) CuSO4(aq) C5H12(l) CO2(g)

lara31 [8.8K]

Answer:

CuSO4(aq)

Explanation:

The aqueous for of CuSO₄ is an electrolyte and it will conduct electricity.

CuSO₄ is an ionic substance and in solid state, it will not have the ability to conduct electricity.

In aqueous form, it will contain free mobile ions which serves as carriers of electric current.
In the solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity.
The remaining given compounds will not conduct electricity as they are non-polar and do not have free mobile electrons.

5 0

3 years ago

Gold’s natural state has a definite shape and a definite volume. What is gold’s natural state(s)?

Mekhanik [1.2K]

Answer:

Solid

Explanation:

6 0

3 years ago

Read 2 more answers

The combustion of liquid methanol has a change in enthalpy of -1278 kJ. How much energy will you get from burning 245.0 g of met

Nookie1986 [14]

Answer : 9773 kJ

Explanation:

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and $\Delta H$ for the reaction comes out to be negative.

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of methanol}=\frac{245.0g}{32.04/mol}=7.647moles$

Given : Change in enthalpy on combustion of 1 mole of methanol = -1278 kJ

According to stoichiometry :

1 mole of methanol produce energy = 1278 kJ

Thus 7.647 moles of methanol produce energy = $\frac{1278}{1}\times 7.647=9773kJ$

Thus 9773 kJ of energy is produced from burning 245.0 g of methanol in excess oxygen

3 0

3 years ago