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3 years ago

What causes water molecules to be attracted to each other?

2 answers:

8 0

This polarity makes water molecules attracted to each other. The oxygen-hydrogen bond in the alcohol molecule is also polar. But, the carbon hydrogen bonds in the rest of the alcohol molecule are nonpolar. In these bonds, the electrons are shared more or less evenly.

dimulka [17.4K]3 years ago

7 0

Answer:

Both polar covalent bonds inside each water molecule and hydrogen bonds inside each water molecule are liable for attraction between water molecules.

Explanation:

Water is a polar protic molecule.
Due to large difference in electronegativity between oxygen and hydrogen atom, two O-H bonds in water molecule are polar.
Due to the presence of polar covalent bonds in water molecule, water molecules attract each other through oppositely polarized ends.
In water molecules, H atom is attached with highly electronegative oxygen atom. Hence hydrogen bonding interaction arises between water molecules.
So, both option (A) and (B) are correct

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The smallest atoms can themselves exhibit quantum-mechanical behavior. Calculate the de Broglie wavelength (in picometers) of a

Sunny_sXe [5.5K]

Answer:

810 pm

Explanation:

Step 1: Given and required data

Velocity of the atom (v): 490 m/s

Mass of a hydrogen atom (m): 1.67 × 10⁻²⁷ kg

Planck's constant (h): 6.63 × 10⁻³⁴ J.s

Step 2: Calculate the de Broglie wavelength of the hydrogen atom

We will use de Broglie's equation.

λ = h / m × v

λ = 6.63 × 10⁻³⁴ J.s / 1.67 × 10⁻²⁷ kg × 490 m/s = 8.10 × 10⁻¹⁰ m

Step 3: Convert 8.10 × 10⁻¹⁰ m to picometers

We will use the conversion factor 1 m = 10¹² pm.

8.10 × 10⁻¹⁰ m × 10¹² pm/1 m = 810 pm

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3 years ago

The nucleus of one lithium atom has three protons and four neutrons. what is the total charge of the lithium nucleus.

Xelga [282]

Since protons are postive and neutrons are neutral. Then it is postive.

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3 years ago

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Why is combustion of fuel necessary for heat engines to do work?

azamat

Because during combustion reaction, heat energy is released and it's this energy that is converted to work

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3 years ago

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What will knowledge of chemistry enable you to do?

mixer [17]

Be a chemist. Lol. Lessen waste, make chemicals more efficient, cure diseases... and stuff :)

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3 years ago

Scientist can use trees to look at climates of the past. How? What information can they gather and how do they gather it? Explai

andrezito [222]

Explanation:

Scientist use trees a whole lot to look at climate of the past by examining tree rings.

These are layers of cambium in each successive years formed. They have an annual growth pattern and are known as tree rings.

Tree rings can be used to decipher the age of a tree.

These three rings can be used to interpret climatic patterns.
During a wet climate, the tree rings are more robust and bigger.
In a dry climate, the rings are thinner.
These alternating patterns can be used to decipher the climatic signatures in a tree.
Sometimes, it is possible to evaluate some certain isotopes that are useful in climatic studies.

learn more:

Climate change brainly.com/question/7824762

#learnwithBrainly

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3 years ago