nohjin asks

Where does the energy in freezing water come from? When water freezes, its volume increases so that...

david caron from Toronto asks

What is the energy required to split H2O, (joules), and the energy released from combusting H2 +...

Leo from Montville, NJ asks

Where can I find the data to support that polyvinylpyrrolidone is safe for medical applications? ...

Charl Mai from Vancouver, Canada asks

Do herbal medicines interfere with the effectiveness of prescription medicines? If so, how does...

Corinna asks

Can stabilized oxygen be used in place of iodine or chlorine to purify water? What if used in...

Tony from Melbourne asks

In my recent science project, I tried discharging batterys in the freezer, fridge and room. The...

Antony St-Jacques from Kingston asks

How can I separate NaCl so I can obtain Na?

Julie asks

What is the chemical make-up of pear, banana and apple peels?

Kaycie Nabeta asks

Can you explain where the "extra" ATP comes from in photosynthesis? As I understand it: 24 ATP...

Shaheena Perveen from Karachi, Pakistan asks

Why do we get coloured water if we put a slice of beet root in water but we do not get coloured...

Mohammed Talha Khan asks

Why does water evaporate when it is left out in the open?

Payal from Buffalo asks

How do you determine the proportion of the various gases in the air?

Julian asks

How can I make my own methylated spirit? How does pectin gel?

Peter Baum asks

How can I measure how much liquid is in an apple, lettuce, a potato, and an orange?

Sara asks

What is fire composed of? Could you have liquid fire, or solid fire?

Mike Tripple asks

What happens to the ice cubes in our freezer bucket. They get smaller even if they are a solid. Do...

Sam asks

Can a 'stove' be made using methane gas produced by waste material?

Helina from Shakespeare asks

What two liquids combine that gives you a solid instantly?

Tony Sousa asks

How do hot packs work? My wife purchased a reusable hot pack for keeping our baby warm when we go...

Michel lamontagne from edmonton asks

I am wondering how water/air changes it's molecular structure so that when air is heated it...

Chandler robinson asks

What is Tritium?

Josh Blake from Mississauga, Ontario asks

I am really interested in chemistry and I was wondering where I would be able to purchase some of...

Carla Becker from Dallas asks

If we are making a perfume and we pour alcohol on an orange peel; why would the smell increase the...

Jonathan asks

Would you be able to help me out in any way to find material on Fluorine?

H Beken from Dayton, Ohio asks

I have been trying to find formulas for simple auto windshield washer fluid. Can't find anything....

justine van der Werf from Tiaro asks

I have read that when oxygen is condensed to a liquid state, or indeed to a solid state it becomes...

petra from chamblee asks

How long does it take styrofoam to decompose? Are there chemicals that help to cause the...

Sandra Lenzi from Morris Plains, NJ asks

Why is the helical content higher in gelatin with higher molecular weight. In other words, it seems...

Eric Johnson asks

Is it harmful to inhale sulfur which has been heated?

B.Krystol from Jasper asks

Why is Isobutane ( C4H8) a gas at 25 C and Dodecahedrane ( C20H20) a solid at 25 C?

Corinne Keffer from Halifax, NS asks

I have a liquid crystal display screen computer monitor. I am looking for unbiased information on...

Ian Hancock from Calgary asks

In Chemistry today, we learned that when HCl is ionized in water, the H2O becomes H3O+, because of...

Nathaniel P. Luga from Cebu City asks

What chemical or chemicals that can desolve a strong concrete structure, and what is its mixture...

Aliahs Ahmadzai from Maple Ridge, BC asks

When you get a lighter and get a piece of metal and you turn on the lighter and put it over the...

Tridib Das from Guwahati, Assam, India asks

Just like 1 mole of water contains Avogadros number of molecules and has the same mass as that of...

Darrin asks

Why does an atom have neutrons and why does a specific atom have a limited amount of isotopes. For...

Atul Mulay asks

What chemical reaction takes place when you use henna to tint skin? Is it possible to extract the...

Cathy Schroeder asks

Why do batteries behave differently when kept at different temperatures? In my science project a...

Kim Monin from Nepean, Ontario asks

I am trying to make natural beeswax into an ivory colour. Some people say they use natural dyes. ...

Amanda from Calgary asks

I am interested in finding more information on how to detect the presence of arsenic in the foods...