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.
|Name the following compounds||General||Nigeria|
|Which is the lightest gas?||Uses for Hydrogen||Ghana|
|Is an apple a polar molecule?||Polar Molecules||Pakistan|
|Wants objective questions||Chemistry Basics||Pakistan|
|Order of elements in a formula||Order of Elements in a Formula||Pakistan|
|Which molecule is more polar than the other?||Polar Molecules||India|
|Send me notes and questions||General||Malawi|
|Temperature and organic molecules||General||South Africa|
|What is a solution?||Mixture Types||Pakistan|
|Why are solid and liquid oxygen blue?||Oxygen||Nepal|
|Can there be more protons than neutrons in a nucleus?||Isotopes||Ghana|
|Is polluted water a suspension or solution?||Mixture Types||Japan|
|Which is more polar water or alcohol?||Polar Molecules||USA|
Name the following compounds
December 6, 2015
what is the Iupac name of the following compounds
Musa - Nigeria (26591)
I am sorry, but I do not have that information.
Which is the lightest gas?
December 2, 2015
PLS IS H2 GAS AND HE GAS WHICH ONE IS THE LIGHTEST GAS?
YUNUSAH - Ghana (26586)
The Hydrogen molecule (H2) weighs 2 atomic units (AU), while the Helium atom is heavier and weighs 4 AU.
The problem is that Hydrogen is highly inflammable, thus Helium is usually used in balloons, because it does not burn and is safer.
Is an apple a polar molecule?
October 23, 2015
Apple is polar molecule or non-polar molecule......?
M.Naveed - Pakistan (26468)
An apple is made up of many different types of molecules. Some may be polar and some non-polar.
If you select a specific molecule or material in an apple, you can find whether it is polar or not.
Wants objective questions
October 21, 2015
please kindly send me an objective type questions
haseeb - Pakistan (26462)
I'm sorry but the only questions we have right now are in the Mini-Quiz. However, there is a Graded Chemistry test you can take.
Order of elements in a formula
September 7, 2015
hi sir, I have a question that why we write Carbon first and then Hydrogen in formula of Benzene..?? and is there any general rule for order of elements in formulas other than Hill system!; thank you very much...!
husnain - Pakistan (26359)
The Hill system states that carbon is listed first and then hydrogen in hydrocarbons. Thus the formula for Benzene is C6H6.
In ionic compounds such as NaCl, the positive ion is listed first.
Another rule is that oxides end in O and acids start with H in most cases.
August 16, 2015
How can I use hydrogen?
alpesh - India (26277)
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.
July 16, 2015
Can 80% Propane be bonded with 20% Ethane to be fused together to be near azeotropic
Charles - Australia (26176)
I'm sorry, but I don't have that information.
Which molecule is more polar than the other?
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)
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.
Send me notes and questions
May 23, 2015
i want u guyz to send me note and questions so that i can answer them all
Alfred - Malawi (26024)
The best thing to do is to go through the Chemistry lessons and try to answer the Mini-Quiz questions.
Temperature and organic molecules
May 20, 2015
What is the relationship between temperature and the properties of organic molecules?
Banele - South Africa (26016)
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.
What is a solution?
May 9, 2015
What is solution
- Pakistan (25988)
See Chemical Solutions for an explanation.
Why are solid and liquid oxygen blue?
April 4, 2015
Although oxygen gas is colorless, why the liquid and solid forms of oxygen are blue?
Dilip - Nepal (25886)
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.
Can there be more protons than neutrons in a nucleus?
March 1, 2015
Pls can the number of protons be more than the number of neutons in a particular nucleus?
Umar - Ghana (25803)
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.
Is polluted water a suspension or solution?
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)
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.
Which is more polar water or alcohol?
February 22, 2015
which is more polar water or alcohol? or are they same
- USA (25779)
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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