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3 years ago

What is true of a covalent bond? (03.03)

Chemistry

2 answers:

garri49 [273]3 years ago

6 0

Answer:

I think B..

Explanation:

It is the sharing of electrons from one atom to another .

Brrunno [24]3 years ago

5 0

Answer:

The answer is b: It is the sharing of electrons by overlapping orbitals

Explanation:

The ionic bong involves the exchange of electrons from one atom to another to keep eight particles in their outermost orbit. In this way the atoms become stable. This happens between a metal, which losing electrons becomes a cation that now has a positive charge, and a non-metal, which accepting electrons becomes an anion that now has a negative charge. So the ionic bond is the electrostatic attraction between oppositely charged particle (cation and anion).

No chemical bond involves sharing neutrons between two nuclei. Chemical bonds occur between the electrons of atoms, which are found in the outer layer around the nuclei.

So, the correct answer is b: It is the sharing of electrons by overlapping orbitals. This happens between two non-metallic elements.

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Which statement is true about the patterns shown on the electromagnetic spectrum?

Rudiy27

A. As wavelength increases, radiant energy and frequency increase.

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2 years ago

Two or more compounds that have the same molecular formula, but different arrangements of their atoms, are called_____ isomers.

dusya [7]

Structural isomers, as the structure of the molecule is different

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3 years ago

You have ice cubes in your freezer at home. The ice cubes melt into water. This type of change is called a... O a. nuclear chang

blagie [28]

B ) its a physical change

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3 years ago

Avoid of diseases in monsoon season-

Dominik [7]

Answer:

Monsoon seasonal diseases can be avoided by keeping surroundings clean, removing stagnant water, eating homemade food, washing hands properly, eating clean and drinking boiled water.

Explanation:

1. Make efforts in making the environment mosquito free by proper cleaning and removing stagnant water as well.

2. Use mosquito repellant, mainly net that has no side effects and is ecofriendly.

3. Avoid moving to crowded places to prevent viral infections.

4. Consume food made at home and boiled water.

5. Wash hands before consuming food.

4 0

3 years ago

1. Methane (CH4) combusts as shown in the equation below. If 3 moles of methane were used in the combustion, what would be the c

umka2103 [35]

Answer:

The change in enthalpy in the combustion of 3 moles of methane = -2406 kJ

Explanation:

Step 1: The balanced equation

CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g) ΔH = -802 kJ

Step 2: Given data

We notice that for 1 mole of methane (CH4), we need 2 moles of O2 to produce : 1 mole of CO2 and 2 moles of H20.

The enthalpy change of combustion, given here as Δ H , tells us how much heat is either absorbed or released by the combustion of one mole of a substance.

In this case: we notice that the combustion of 1 mole of methane gives off (because of the negative number), 802.3 kJ of heat.

Step 3: calculate the enthalpy change for 3 moles

The -802 kj is the enthalpy change for 1 mole

The change in enthalpy for 3 moles = 3* -802 kJ = -2406 kJ

The change in enthalpy in the combustion of 3 moles of methane = -2406 kJ

5 0

3 years ago