Cromatografía de columna homogénea o heterogénea?

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

What type of reaction fuels the processes seen here?