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.
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 ...
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 ...