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Chemistry Feedback

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 15 letters

Title

Topic

Country

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
 

Next 15 letters

 




First 15 letters


General

I want to know about Chemistry

January 28, 2015

Question

i want to no all about chemistry in an simple and understandable way.

Eula - Nigeria (25731)

Answer

We will be adding more simple Chemistry lessons soon. They should help you learn.

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Chemical Compounds

Is steel a compound or a mixture?

December 28, 2014

Question

is steel is compound or mixture

- India (25671)

Answer

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.

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General

How are atoms different than molecules?

December 11, 2014

Question

How atoms differ from molecules

Bongani - South Africa (25636)

Answer

Molecules are made up of at least two atoms.

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Polar Molecules

What is biochemistry?

November 17, 2014

Question

WHAT IS BIOCHEMISTRY

PETRO - Tanzania (25551)

Answer

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.

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General

What are hydrocarbons?

November 13, 2014

Question

what are hydrocarbons

shane - USA (25530)

Answer

Chemical compounds that are a combination of Hydrogen (H) and Carbon (C) atoms are called hydrocarbons. See Hydrocarbon Bonding for information.

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Polar Molecules

Is water a polar or nonpolar?

November 6, 2014

Question

is water a polar or non polar?

Ageshe - Namibia (25506)

Answer

Water is a polar substance, because of the shape of its molecules. Water will dissolve many other polar substances.

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Periodic Table

I want full periodic table diagram

September 18, 2014

Question

I want full periodic table diagram with number and name of elements

Akinropo - Nigeria (25365)

Answer

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.

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General

Treating sugarcane to produce ethanol

September 3, 2014

Question

please teach us. how will we treat a sugarcane to produce ethanol as a polar substance.

kurt - Philippines (25335)

Answer

The process is not easy. See Turning sugar cane into ethanol for the production steps.

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Oxidation

Wants to be best in Chemistry

July 19, 2014

Question

dear sir
i am in chemistry.
Plz help me
how can i best in chemistry.

Chandramani - India (25128)

Answer

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.

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Polar Molecules

Examples of polar and non-polar molecules

July 17, 2014

Question

Please,give me 20 examples of polar and 20 non polar.

Nora - Nigeria (25117)

Answer

See List of polar and non-polar molecules.

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Uses for Hydrogen

How to find sulfur dioxide?

July 13, 2014

Question

pls my question sir how can we find sulphideoxide in volcanic.? pls

aminu m - Nigeria (25109)

Answer

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.

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Polar Molecules

Why are hydrocarbons non-polar?

June 30, 2014

Question

Y are hydrocarbons non-polar

Lekan - Nigeria (25076)

Answer

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.

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Mixtures

What is a chemical reaction?

June 15, 2014

Question

what is your reaction?

orvel - Philippines (25056)

Answer

In chemistry, a reaction happens when two or more molecules interact and the molecules change.

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Chemical Bonding

What is the meaning of arrows?

June 7, 2014

Question

What is the meaning of arrows in physical science?

chifundo - Malawi (25043)

Answer

In chemical equations, such as C + O2 -> CO2, the arrow means that the combination of elements becomes the other compound.

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Uses for Hydrogen

Why is Helium highly inflammable?

May 27, 2014

Question

why helium is highly inflamable?

bala - USA (24991)

Answer

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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Next 15 letters


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