How do you determine the proportion of the various gases in the air?
from Karachi, Pakistan
Why do we get coloured water if we put a slice of beet root in water but we do not get coloured...
How can I make my own methylated spirit?
How does pectin gel?
Can stabilized oxygen be used in place of iodine or chlorine to purify water? What if used in...
Where does the energy in freezing water come from? When water freezes, its volume increases so that...
What is fire composed of? Could you have liquid fire, or solid fire?
Can you help me with a wonderful magic trick I performed as a boy? I made a silk rose change...
What is the chemistry behind the method of cleaning silver where you place it on some aluminum foil...
Mohammed Talha Khan
Why does water evaporate when it is left out in the open?
Does the location of chlorophyll a in the thylakoid membrane have anything to do with its...
Why does a saturated solution of calcium acetate gel when either ethanol or isopropanol is added to...
How can I measure how much liquid is in an apple, lettuce, a potato, and an orange?
How do hot packs work? My wife purchased a reusable hot pack for keeping our baby warm when we go...
What two liquids combine that gives you a solid instantly?
What happens to the ice cubes in our freezer bucket. They get smaller even if they are a solid. Do...
Why does the Periodic Table of the Elements have two separate tables - one above and one below?
I am experimenting with microwave reboil caused when you microwave coffee or water and add sugar,...
Can a 'stove' be made using methane gas produced by waste material?
Would you be able to help me out in any way to find material on Fluorine?
What is Tritium?
I am wondering how water/air changes it's molecular structure so that when air is heated it...
Why do batteries behave differently when kept at different temperatures?
In my science project a...
from Mississauga, Ontario
I am really interested in chemistry and I was wondering where I would be able to purchase some of...
What chemical reaction takes place when you use henna to tint skin? Is it possible to extract the...
from Halifax, NS
I have a liquid crystal display screen computer monitor. I am looking for unbiased information on...
How long does it take styrofoam to decompose? Are there chemicals that help to cause the...
D. Andrew White
Do different isotopes vary slightly in chemical properties? Or are they the same? i.e. are the...
If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...
Is it harmful to inhale sulfur which has been heated?
from Dayton, Ohio
I have been trying to find formulas for simple auto windshield washer fluid. Can't find anything....
Jerry E. Allen
Is it possible to freeze water in a vacuum? Is there a chart that shows water temperature vs....
Why is Isobutane ( C4H8) a gas at 25 C and Dodecahedrane ( C20H20) a solid at 25 C?
from Guwahati, Assam, India
Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...
How does a lightstick work, and what are the chemicals involved?
Can you tell me what the exact pH of the acid in our stomach?
justine van der Werf
I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...
from Los Angeles
Why do dry cell batteries (rechargeable) need to be fully drained before they can be recharged?
from Andradas-MG- Brazil
When you squeeze out a piece of orange-peel on a flame, it catches fire violently. Why? What is...
from Morris Plains, NJ
Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...
I am interested in finding more information on how to detect the presence of arsenic in the foods...
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