Answer:
In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring.
Answer:
C!
Explanation:
only C
A: solid B: liquid : C: GAS
Answer:
What do you mean need more details
Explanation:
The troposphere has the most density because it has the most air pressure. As you get higher in the atmosphere, the air gets thinner, which is why people who climb high mountains get sick because the air is not thick enough for them to breathe.
X * 0.10 mg/mL = 0.50 mg
x = 0.50 mg / 0.10
x = 5.0 mL
hope this helps!
