Chemical equations model the changes that happen in chemical reactions. Avogadro constant and moles - OCR Gateway The mole is the unit for amount of substance. The number of particles in a ...

Some chemical reactions change temperature, change color, produce a gas, or make a solid from two liquids. Try this reaction and see what it does! Pour 1 tablespoon of hydrogen peroxide into a cup.

It's a regrettable reality that there is never time to cover all the interesting scientific stories we come across each month. In the past, we've featured year-end roundups of cool science stories we ...

Bubbles – Many chemical reactions you see in the science lab make a chemical which is a gas, so you see bubbles. A colour change – If the new chemicals are a different colour from the original ...

Zhang Xin from the Hefei Institutes of Physical Science of the Chinese Academy ... The study is published in the journal ... A chemical reaction is a process that always results in the ...

Fireworks, explosives and fuels, on the other hand, all involve very fast and extremely exothermic chemical reactions. The first 'reaction' that we tried for our hand warmer involved dissolving ...