Answer:
ΔH = - 44.0kJ
Explanation:
H2O(l)→H2O(g), ΔH =44.0kJ
In the reaction above, liquid water changes to gaseous water. This occurs through a process known as boiling. This process requires heat, hence the ΔH is positive.
If he reaction is reversed, we have;
H2O(g)→H2O(l)
In this reaction, gaseous water changes to liquid water. This process is known as condensation. The water vapor loses heat in this reaction. Hence ΔH would be negative but still have the same value.
Sorry I don’t know the answer I am just Thea answer is whatever the person you answer Rushdie you answer the answer negative and I am trying something I am so sorry
Answer:
photons are emitted per second in a 
Watt microwave oven.
Explanation:
The expression for the power is:-
Also, 
Where,
n = the number of photons
h = Plank's constant having value 
c = the speed of light having value 
= the wavelength of the light
So,
Thus, the expression for photons per second is:-
Given that:-
Power = 10³ Watt
( 1 cm = 0.01 m)
[/tex]
So,
photons are emitted per second in a Watt microwave oven.
Answer:
In a classroom, the comparison that a teacher would most likely use for describing a mole is jar of jellybeans and a gram of salt crystals.
Answer:1)1.99 M
Explanation:
Molarity is given as = moles solute/Liter solution
The solute which is LiOH is already given in moles as 1.495 moles
Given that solution is 750 mL, we convert to liters.
Liters of the solution= mL of the solution x (1 L/1000 mL)
750 mL x (1 L/1000 mL)
0.75 L
Molarity = moles solute/Liter solution
Molarity = 1.495 moles of LiOH/0.75 L of solution
Molarity = 1.99M
The molarity of this solution is 1.99M (moles per liter).
