12.Combustion reactions take place between a fuel and oxygen and produce carbon dioxide and water. Balance the following combustion reaction.

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .