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.
|I want to know about Chemistry||General||Nigeria|
|Is steel a compound or a mixture?||Chemical Compounds||India|
|How are atoms different than molecules?||General||South Africa|
|What is biochemistry?||Polar Molecules||Tanzania|
|What are hydrocarbons?||General||USA|
|Is water a polar or nonpolar?||Polar Molecules||Namibia|
|I want full periodic table diagram||Periodic Table||Nigeria|
|Treating sugarcane to produce ethanol||General||Philippines|
|Wants to be best in Chemistry||Oxidation||India|
|Examples of polar and non-polar molecules||Polar Molecules||Nigeria|
|How to find sulfur dioxide?||Uses for Hydrogen||Nigeria|
|Why are hydrocarbons non-polar?||Polar Molecules||Nigeria|
|What is a chemical reaction?||Mixtures||Philippines|
|What is the meaning of arrows?||Chemical Bonding||Malawi|
|Why is Helium highly inflammable?||Uses for Hydrogen||USA|
I want to know about Chemistry
January 28, 2015
i want to no all about chemistry in an simple and understandable way.
Eula - Nigeria (25731)
We will be adding more simple Chemistry lessons soon. They should help you learn.
Is steel a compound or a mixture?
December 28, 2014
is steel is compound or mixture
- India (25671)
Steel is an alloy of iron and usually carbon. They are mixed together had very high temperatures. They do not combine chemically, so steel is not a compound.
How are atoms different than molecules?
December 11, 2014
How atoms differ from molecules
Bongani - South Africa (25636)
Molecules are made up of at least two atoms.
What is biochemistry?
November 17, 2014
WHAT IS BIOCHEMISTRY
PETRO - Tanzania (25551)
Biochemistry is the study of chemical processes having to do with living organisms, such as plants and animals. For example, how food is digested and turned into energy is studied under biochemistry.
What are hydrocarbons?
November 13, 2014
what are hydrocarbons
shane - USA (25530)
Chemical compounds that are a combination of Hydrogen (H) and Carbon (C) atoms are called hydrocarbons. See Hydrocarbon Bonding for information.
Is water a polar or nonpolar?
November 6, 2014
is water a polar or non polar?
Ageshe - Namibia (25506)
Water is a polar substance, because of the shape of its molecules. Water will dissolve many other polar substances.
I want full periodic table diagram
September 18, 2014
I want full periodic table diagram with number and name of elements
Akinropo - Nigeria (25365)
You can use the table in the Periodic Table lesson. By clicking on an element abbreviation, it will show its full name, number, and other facts.
Chemical Elements lists the elements with name and number.
A Periodic Table diagram with the full name of the element is too big to display here.
Treating sugarcane to produce ethanol
September 3, 2014
please teach us. how will we treat a sugarcane to produce ethanol as a polar substance.
kurt - Philippines (25335)
The process is not easy. See Turning sugar cane into ethanol for the production steps.
Wants to be best in Chemistry
July 19, 2014
i am in chemistry.
Plz help me
how can i best in chemistry.
Chandramani - India (25128)
You can go through our lessons as a start. Look at our Chemistry Resources for other sources of information.
Best wishes for success in your class.
Examples of polar and non-polar molecules
July 17, 2014
Please,give me 20 examples of polar and 20 non polar.
Nora - Nigeria (25117)
How to find sulfur dioxide?
July 13, 2014
pls my question sir how can we find sulphideoxide in volcanic.? pls
aminu m - Nigeria (25109)
Sulfur dioxide has a strong odor similar to rotten eggs. There are detectors available to detect slight amounts of sulfur dioxide in the air. These can be used to tell how much is in the air near a volcano.
Note that sulfur dioxide is different than hydrogen sulfide, although both have a strong odor.
Why are hydrocarbons non-polar?
June 30, 2014
Y are hydrocarbons non-polar
Lekan - Nigeria (25076)
Most hydrocarbons are non-polar, because they only consist of hydrogen and carbon atoms, which are both non-polar.
But in some small hydrocarbons molecules that include a polar alcohol group (OH), a small dipole moment can result thus making the hydrocarbon polar. But this is rare.
What is a chemical reaction?
June 15, 2014
what is your reaction?
orvel - Philippines (25056)
In chemistry, a reaction happens when two or more molecules interact and the molecules change.
What is the meaning of arrows?
June 7, 2014
What is the meaning of arrows in physical science?
chifundo - Malawi (25043)
In chemical equations, such as C + O2 -> CO2, the arrow means that the combination of elements becomes the other compound.
Why is Helium highly inflammable?
May 27, 2014
why helium is highly inflamable?
bala - USA (24991)
Helium is considered an inert gas, such that it does not combine with other elements. One reason is that its outer orbit or shell is filled with two electrons. On the other hand, Hydrogen has only one electron, so it will combine with Oxygen.
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