Which type of chemical formula shows the simplest whole number ratio of atoms in a compound?

What is the concentration of a solution measured in moles per litre called?

What is the SI unit of the amount of substance in chemistry?

Which scientific law states that equal volumes of all gases at the same temperature and pressure contain equal numbers of molecules?

Which type of reaction releases energy to the surroundings causing the temperature to rise?

Which type of reaction occurs when a more reactive metal displaces a less reactive metal from its salt solution?

Which type of reaction absorbs energy from the surroundings causing the temperature to fall?

What is the chemical formula for potassium permanganate a strong oxidising agent?

What is the role of a catalyst in a chemical reaction?

Which synthetic polymer was the first to be produced commercially and is used to make electrical fittings?

What is the chemical formula for washing soda used in cleaning?