Which is a correctly balanced equation for reaction between hydrogen gas and oxygen gas

For each of the following mixtures decide if filtering would be suitable to separate the substances. explain your answers. oil in water sugar in water sand in water chalk in water tea leaves in a cup of tea

Complete the following reactions using word and balanced equations including states. dilute phosphoric acid is added with a calcium hydroxide solution.

Can someone me with questions 12 and 13 plz.