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alcohol angle apparatus balance barium chloride barometer beaker beehive shelf body Boyle's Law bulb-tube bunsen flame burning calcium chloride calorimeter carbonic acid gas centimetre chalk charcoal chemical chloride combustion containing cool copper sulphate cork crystals curve cylinder delivery tube density diameter dissolved distance equal evaporating evolved Exercise experiment fixed flask forces acting formed fumes gas jar gases glass tube Hence hydrochloric acid hydrogen inches inflammable air iron latent heat length lime lime-water liquid litharge litmus magnesium mass means measure melting mercury metal metre mixture nitre nitric acid Notice obtained oxygen phosphorus piece potassium chlorate pressure pulleys residue resultant retort right-angled bend rubber tubing salt scale School soda solid soluble solution specific gravity steam string substance sulphuric acid surface Take temperature test-tube thermometer triangle vernier vertical vitriol washing soda water of crystallisation weight wire zinc