Which of the following is not an example of a chemical change? Select one:
a. forming a precipitate
b. a tarnished spoon
c. respiration
d. bubbles in soda

Which mathematical relationship should you us to convert moles of a substance into grams

Which best explains why an iceberg floats?

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