It must absorb energy in the form of for example heat which gives it the energy required to become excited
hope that helps
Answer:

Explanation:
Hello,
In this case, since the molarity is defined as the ratio of the moles of the solute to the volume of the solution in liters:

For the given volume and molarity, we solve for the moles of ammonium sulfate (solute) as shown below:

Best regards.
B.2C2H6 + 5O2 >2CO2 +3H2O
Density=mass/volume
density=330/20
density=16.5g/ml