Breaking an egg is an example of a physical change. This is because the egg was broken, thus its physical appearance was different. If you were to cook the egg, that would be a chemical change because that would result in a new chemical formation of the stuff inside of the egg. But since you're only breaking the egg, it's just a physical change.
I guess that answers both questions.
Hope that helped!
Lead can be extremely poisonous and was once used in many many paints but caused several deaths from lead poisoning so that was a biggie...
At the center of every chlorophyll molecule, in every plant, there is a magnesium ion. Magnesium is one of the two dozen or so elements that are <em>required </em>for life.
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Answer:
3000 K (2727°C)
Explanation:
Ideal gas law:
PV = nRT
Rearranging:
P/T = nR/V
Since n, R, and V are constant:
P₁ / T₁ = P₂ / T₂
Given:
P₁ = 760 mmHg = 1 atm
T₁ = 27°C = 300 K
P₂ = 10 atm
(1 atm) / (300 K) = (10 atm) / T₂
T₂ = 3000 K
The flask will explode when heated to 3000 K (2727°C).