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sesenic [268]
3 years ago
14

A covalent bond is formed when: a. two nonpolar molecules associate with each other in a polar environment. b. a positively char

ged particle is attracted to a negatively charged particle. c. one atom gives up electrons to another atom. d. two atoms share electrons. e. two polar molecules associate with each other in a nonpolar environment.
Chemistry
2 answers:
Gre4nikov [31]3 years ago
4 0

Answer:

D. two atoms share electrons.

Explanation:

Chemical bonds are very important in chemical reactions. Examples of chemical bonds include electrovalent, covalent etc.

Covalent bonds deals with sharing of electron by two atoms. A common example is that of H2O( Water) in which the Hydrogen atoms share their electrons with the oxygen and the oxygen also shares its own electrons with the hydrogen in a mutual manner.

Nitella [24]3 years ago
3 0

Answer: D.

Explanation:

A covalent bond is formed when atoms share electrons. These can be seen in diatomic molecules such as oxygen (O2), hydrogen (H2) , Chlorine (Cl2) molecule and also in Methane (CH4), Water ( H2O) e.t.c.

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If troy has a 3-cm of each brass gold iron lead which cube will have the greatest mass
Shtirlitz [24]

Answer:

The cube of gold will have the greatest mass.

Explanation:

All the cubes have the same size, so they have the same volume.

The property that varies among the cubes is density.

D = m/V     Multiply both sides by V and transpose.

m = DV

Since V is a constant, m ∝ D.

That is, the cube with the greatest density will have the greatest mass.

The observed densities are

Iron =     7.9 g/cm³

Brass =  8.5 g/cm³

Lead  = 11.4 g/cm³

Gold  = 19.3 g/cm³

Gold has the greatest density, so the cube of gold has the greatest mass.

8 0
3 years ago
Need help :)….please
andrew11 [14]

Answer:

i think B is correct

Explanation:

8 0
3 years ago
Select the correct answer from each drop-down menu.<br> What is the chemical name of this compound?
Law Incorporation [45]

Answer:

<h2>Sodium Sulfide</h2>

Explanation:

Na2s means two sodium atoms and 1 sulfur atom. Sodium Sulfide is the answer. There isn't really a way to explain further.

<em>PLEASE MARK BRAINLIEST</em>

6 0
3 years ago
"What is the change of entropy for 3.0 kg of water when the 3.0 kg of water is changed to ice at 0"
Artyom0805 [142]

Q: What is the change of entropy for 3.0 kg of water when the 3.0 kg of water is changed to ice at 0 °C? (Lf = 3.34 x 105 J/kg)

Answer:

-3670.33 J/K

Explanation:

Entropy: This can be defined as the degree of randomness or disorderliness of a substance. The S.I unit of Entropy is J/K.

Mathematically,  change of Entropy can be expressed as,

ΔS = ΔH/T ....................................... Equation 1

Where ΔS = Change of entropy, ΔH = heat change, T = temperature.

ΔH = -(Lf×m).................................... Equation 2

Note: ΔH is negative because heat is lost.

Where Lf = latent heat of ice = 3.34×10⁵ J/kg, m = 3.0 kg, m = mass of water = 3.0 kg

Substitute into equation

ΔH = -(3.34×10⁵×3.0)

ΔH = - 1002000 J.

But T = 0 °C = (0+273) K = 273 K.

Substitute into equation 1

ΔS = -1002000/273

ΔS = -3670.33 J/K

Note: The negative value of ΔS shows that the entropy of water decreases when it is changed to ice at 0 °C

4 0
3 years ago
Rank the following aqueous solutions from highest to lowest freezing point: 0.1 m FeCl3, 0.30 m glucose (C6H12O6), 0.15 m CaCl2.
Tresset [83]

Answer:

Explanation: See images below for explanation

8 0
4 years ago
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