Covalent bond is formed when atoms share electrons.
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Answer:
When the two gases are mixed, the ammonium chloride precipitates in the tube walls.
Explanation:
This is the reaction:
HCl (g) + NH₃(g) → NH₄Cl (s) ↓
As the product formed is solid at room temperature, a suspension is first formed in the internal air of the tube that appears as a cloud. Afterwards it finally precipitates into the walls forming a white layer
Decreased, this is due to the roots of the plants holding the soil together
A homogenous mixture is uniform and thus hard to recognize as a mixture. An example is water!
Constricted blood vessels
