State which negative ion has the greatest mass in 1000 cm$^3$ of toothpaste.
Name the compound that has NH$_4^+$ ions and CO$_3^{2-}$ ions.
Calculate the mass of fluoride ions in 250 cm$^3$ of toothpaste.
Describe what is seen when aqueous ammonia is added a little at a time to a solution containing zinc ions until the ammonia is in excess. observations with a few drops of ammonia observations with ammonia in excess
Deduce the formula of compound A so that it shows the numbers of carbon, hydrogen and oxygen atoms.
Complete these sentences about ethanol using words from the list. different formula group identical molecule similar Every member of the alcohol homologous series has the same functional ................. . Members of the same homologous series have chemical properties that are ................. .
When ethanol undergoes incomplete combustion, a small amount of carbon dioxide is produced. Name two other substances that are formed when ethanol undergoes incomplete combustion.