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3 years ago

Which of the following compounds will experience hydrogen bonding?

Chemistry

2 answers:

lora16 [44]3 years ago

7 0

I believe the answer is the first one NaH

Natalka [10]3 years ago

6 0

Answer:

HF will experience hydrogen bonding

Explanation:

Hydrogen bonding (H-bonding) is an intermolecular force having partial ionic-covalent character. H-bonding takes place between a hydrogen atom (attached with an electronegative atom e.g. O, N and F) and an electronegative atom (O,N and F).

Hydrogen bonding generally appears in covalent molecules.

Among all four given molecules, HF and $CH_{4}$ are covalent molecules.

In HF, F is a highly electronegative atom attached to a H atom through a covalent bond. Therefore F atoms gets partial negative charge and H atoms gets partial positive charge.

Hence an interaction arises between H atom and F atom resulting formation of H-bonding.

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a block of lead weighed 1591 g and has dimensions 4.50cm by 5.20 cm by 6.00 cm calculate the density of lead from this informati

ahrayia [7]

Density = $\frac{MASS}{VOLUME}$

volume = (4.5 cm) * (5.2cm) * (6.0cm)
= 140.40 cm³

since Mass = 1591 g

then Density = $\frac{1591 g}{140.40 cm^{3} }$

= 11.33 g/cm³

8 0

3 years ago

Balanced chemical equation for the use of hydrogen fuel

Ganezh [65]

I'm not sure but I think is 2H2 => 4H+ + 4e- and O2 + 4H+ + 4e- => 2H2O

3 0

4 years ago

How many core electrons are in a ground state atom of selenium?

Harman [31]

Electrons in an atom can be classified as core electrons and valence electrons. Valence electrons are those electrons which are present in valence shell and participates in bond formation. While, Core electrons are all remaining electrons which are not present in valence shell, hence not take part in bonding.

Atomic number of Selenium (Se) is 34 hence it has 34 electrons with following electronic configuration;

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁴

From electronic configuration it is found that the valence shell is 4, and the number of electrons present in valence shell are 6. So,

Core Electrons = Total Electrons - Valence Electrons

Core Electrons = 34 - 6

Core Electrons = 28

Result:
There are 28 core electrons in Selenium.

3 0

3 years ago

At one point in your life, you might have played on a swing. Have you ever wondered why, after the first swing, it will slow dow

cestrela7 [59]

Answer:

at the top of the swing

at the bottom of the swing

Explanation:

7 0

3 years ago

What are the 5 steps that a star will go through to try to maintain equilibrium?

BigorU [14]

Answer:

1.Nuclear fusion.

2.Out of fuel.

3.Fusion stops temperature drops.

4.Core contracts (gravity pulling atoms in).

5.Increased temperature (more atoms, more collisions) and density in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins again at step 1.

Explanation:

5 0

3 years ago