Its D for the second energy level, but the first energy level is 2.
As i am reading the question, I notice they give two concentrations (M), one volume (L), and they are asking for another volume. this is a hint that you need to use the following formula
C1V1 = C2V2 (note: C stands for concentration)
C1= 2.9 M
V1= ?
C2= 1.1 M
V2= 2.3 L
now let's plug in the numbers
( 2.9 x V1)= (1.1 X 2.3)
V1= 0.87 Liters
Answer:What happens to the temperature of a substance during a phase change? Why does this happen?
Explanation:During a phase change the temperature remains constant. This is because the heat supplied to change the state of matter is used in breaking the intermolecular forces and other attractive forces. Therefore, the temperature remains constant as no heat is absorbed or released.
<span>Fry's Reagent a chemical used on metals such as firearms, it corrodes them and allows you to see the etching that could have been scratched off by the criminal, such as the serial number of the gun. It is </span><span>a chemical that can restore a serial number that has been removed from a gun by dissolving the area that has been flattened when the number was stamped on.</span>
