Answer:
Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and a rubber ball dropped together. Air resistance causes the feather to fall more slowly, while the ball falls more fast.
Answer:
It is not a pure substance.
Answer:
please where are the questions and also make your questions clear.
FeCl₂ + 2NH₄OH → Fe(OH)₂ + 2NH₄Cl