Answer:
In a chemical change the nature of the substance changes and it is transformed, for example when a piece of wood is burned, the carbon is being transformed into carbon dioxide. A physical change is one where the nature of matter does not vary.
I hpoe help you.
Answer:
When the weather is very cold outside, let the cold water drip from the faucet served by exposed pipes. Running water through the pipe - even at a trickle - helps prevent pipes from freezing.
Remember to keep both cold and hot water dripping during these frigid temperatures. We know to keep the faucets dripping when temperatures dip below freezing, but experts say you need to keep both cold and hot water open
Hope this helps :) pls give brainliest
Explanation:
Answer: 18634 joules
Explanation:
The quantity of Heat Energy (Q) released when a heated substance is cooled depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)
Thus, Q = MCΦ
Since,
Q = ?
Mass of oil = 345g
C = 0.220 J/g°C
Φ = (Final temperature - Initial temperature)
= 0°C - 220°C = -220°C
Then, Q = MCΦ
Q = 345g x 0.220 J/g°C x -220°C
Q = 18634 joules (note that negative sign will not reflect in answer, because it only indicates that heat was released rather than gained)
Thus, 18634 joules of heat is released
Answer : The concentration of NO is, 
Solution : Given,
Concentration of 
and 
= 152 M
Equilibrium constant, 
= 
The given equilibrium reaction is,
The expression of will be,
![K_c=\frac{[NO]^2}{[N_2][O_2]}](https://tex.z-dn.net/?f=K_c%3D%5Cfrac%7B%5BNO%5D%5E2%7D%7B%5BN_2%5D%5BO_2%5D%7D)
Now put all the given values in this expression, we get:
![2.0\times 10^{-9}=\frac{[NO]^2}{152\times 152}](https://tex.z-dn.net/?f=2.0%5Ctimes%2010%5E%7B-9%7D%3D%5Cfrac%7B%5BNO%5D%5E2%7D%7B152%5Ctimes%20152%7D)
![[NO]=6.8\times 10^{-3}M](https://tex.z-dn.net/?f=%5BNO%5D%3D6.8%5Ctimes%2010%5E%7B-3%7DM)
Therefore, the concentration of NO is,
The impact that the oil spill has is environmental impacts.
