It would be 20 give me bravest
The number that would be in the place of x and Y is
x=2
Y=1
Hence the formula will be K2Se
Explanation
When K+ which is positively charged combine with selenide (se2-) which is negatively charged they form an ionic bond K2Se.
- 2 potassium ions K+) loses 1 electron each while selenide ion (Se2-) accept the 2 electron, Hence the formula of ionic bond is K2Se
The new volume of the bag will be 789.5 mL.
<u>Explanation:</u>
As per the Charles law, at constant pressure the volume of the gas is directly related to its temperature in Kelvin (K). That is as the temperature increases, the gas expands and vice-versa.
V1 = 250 ml
V2 = ?
T1 = 19° C
T2 = 60° C
Now we have to rewrite the equation to get the new volume as,
V2 =
=
<em> </em>= 789.47 ≈ 789.5 ml.
So the new volume of the bag will be 789.5 mL.
Open system ( exchanges energy and matter with the surroundings)
Closed system ( exchanges only energy with the surroundings)
Isolated system ( does not exchange energy or matter)
Adiabatic system ( does not allow any heat to be transferred into or out of the system)