The iron nail displaces the Cu from the copper sulfate solution. This results in the color of CuSO4's disappearance. Copper is less reactive than iron.
It reduces the chance of an extinction given a natural disaster. If there is more diversity and lets say a wildfire happens, more species would survive the event to repopulate the area
Answer:

Explanation:
Data:
MM = 848.952 g/mol
c = 4.0 x 10⁻⁶ g/L
V = 1 L
Calculations:
(a) Mass of growth hormone

(b) Moles of growth hormone

Answer:
Gases mix easily because of their high kinetic energy and low inter-molecular forces.
Explanation: