b. potassium reacts with water
d. a rotting apple
g. sublimation of dry ice
h. dissolve sugar in water
j. hydrogen is a flammable gas
Which of the following are chemical changes?
a. mercury has a density of 13600 kg/m3
b. potassium reacts with water
c. hammer a nail into a piece of wood
d. a rotting apple
e. potassium is a soft metal
f. evaporation of water g. sublimation of dry ice
h. dissolve sugar in water
i. a growing flower
j. hydrogen is a flammable gas
1 answer