14.) Analyze: What pattern do you see?

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Compare and contrast physical changes with chemical changes.

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3