Consider the reaction below. HI + H2O Right arrow. H3O+ + I– Which is an acid-conjugate base pair? HI and H2O H2O and H3O+ H3O+ and I– HI and I–

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Avariable that is not being directly tested during an experiment should be

What happens to the temperature of a substance when the average kinetic energy of its particles increases?