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Feedback Q&A on Chemistry

by Ron Kurtus

Readers have sent in a total of 545 comments and questions on Chemistry issues. They are listed according to date.

You can read them to further your understanding of the subject.



List of next 10 letters

Topic

Title

Country

Hydrogen About hydrogen India
 
Hydrocarbon Bonding Azeotropic Australia
 
Polar Molecules Which molecule is more polar than the other? India
 
General Send me notes and questions Malawi
 
General Temperature and organic molecules South Africa
 
Mixture Types What is a solution? Pakistan
 
Oxygen Why are solid and liquid oxygen blue? Nepal
 
Isotopes Can there be more protons than neutrons in a nucleus? Ghana
 
Mixture Types Is polluted water a suspension or solution? Japan
 
Polar Molecules Which is more polar water or alcohol? USA
 

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First 10 letters


About hydrogen

Topic: Hydrogen

Question

August 16, 2015

How can I use hydrogen?

alpesh - India

26277

Answer

You can use as well as create hydrogen in chemical reactions. It was once used in balloons but proved to be dangerous, because it it inflammable.

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Azeotropic

Topic: Hydrocarbon Bonding

Question

July 16, 2015

Can 80% Propane be bonded with 20% Ethane to be fused together to be near azeotropic

Charles - Australia

26176

Answer

I'm sorry, but I don't have that information.

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Which molecule is more polar than the other?

Topic: Polar Molecules

Question

June 16, 2015

How Do we know which molecule is more polar than the other? I Didn't not understand it completely.

Rohan - India

26093

Answer

The configuration of the atoms in a molecule determine whether it is polar, such that one side has more positive charges and the other more negative. However, it is not easy to determine the configuration. In some cases, you can verify there are more charges on one side as compared to a different molecule.

The web page Molecular polarity gives some good information on the subject.

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Send me notes and questions

Topic: General

Question

May 23, 2015

i want u guyz to send me note and questions so that i can answer them all

Alfred - Malawi

26024

Answer

The best thing to do is to go through the Chemistry lessons and try to answer the Mini-Quiz questions.

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Temperature and organic molecules

Topic: General

Question

May 20, 2015

What is the relationship between temperature and the properties of organic molecules?

Banele - South Africa

26016

Answer

Temperature can determine whether organic molecules are as a gas, liquid, or solid. Also, at certain temperatures, the chemical reactions may occur with other materials. For example, wood will burn or oxidize when the temperature is high enough.

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What is a solution?

Topic: Mixture Types

Question

May 9, 2015

What is solution

- Pakistan

25988

Answer

See Chemical Solutions for an explanation.

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Why are solid and liquid oxygen blue?

Topic: Oxygen

Question

April 4, 2015

Although oxygen gas is colorless, why the liquid and solid forms of oxygen are blue?

Dilip - Nepal

25886

Answer

The blue color of a material like solid or liquid oxygen comes from blue wavelengths being selectively reflected from the material. Since the molecules of oxygen gas are so widely spread apart, you don't see the color under ordinary conditions. However, when you look into the sky, the layer of oxygen is very thick and the blue wavelengths are reflected to the Earth.

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Can there be more protons than neutrons in a nucleus?

Topic: Isotopes

Question

March 1, 2015

Pls can the number of protons be more than the number of neutons in a particular nucleus?

Umar - Ghana

25803

Answer

There are only two stable atoms or isotopes with more protons than neutrons.Hydrogen only has 1 proton and no neutrons. The Helium-3 isotope has 2 protons and 1 neutron.

There are other isotope with more protons than neutrons--such as Lithium-4 and Carbon-8--but they are unstable and radioactive, such that they decay into a stable form.

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Is polluted water a suspension or solution?

Topic: Mixture Types

Question

February 24, 2015

IS POLLUTED WATER A COLLOID SUSPENSION OR A SOLUTION I NEED TO KNOW I HAVE A TEST SOON PLEASE HELP

nekopockygurl - Japan

25787

Answer

The causes of polluted water can be complex.

Usually polluted water is a mixture of dirty material. Some chemicals can dissolve in the water to make the pollution a solution. Materials in the water that could create a colloid suspension would consist of particles that do not settle.

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Which is more polar water or alcohol?

Topic: Polar Molecules

Question

February 22, 2015

which is more polar water or alcohol? or are they same

- USA

25779

Answer

Water is more polar because it has opposite signs on both the ends. Also, water doesn't have the non-polar carbon-carbon bonds.

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Summary

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