Answer:
Explanation:
There are many avenues of "current" research, so to spark.
- Improved efficiency and lower-cost photovoltaic cells,
- Improved, and lower cost, battery technology,
- Systems for harnessing tidal and wave power from the oceans,
- Molten salt energy storage for solar reflector arrays,
- Hydrogen-powered motors for vehicles,
- Gas storage (hydrogen) for transportation.
- Energy storage systems such as flywheels, molten salts, hydro power, etc., and
- Higher efficiency motors and electromagnetic devices
- Replacement of fuel-powered motors with electrical motors in transportation, including vehicles, ships, and planes.
Finding less expensive, and non-toxic materials is important. Less-enpense, and safer, alternatives to rare earth metals is sought.
Explanation:
Chemical reaction equation for the give decomposition of 
is as follows:.
And, initially only is present.
The given data is as follows.
= 2.3 atm at equilibrium
= 0.69 atm
Therefore,
= 0.23 aatm
So, = 2.3 - 2(0.23)
= 1.84 atm
Now, expression for 
will be as follows.
= 
= 0.0224
or, 
Thus, we can conclude that the pressure equilibrium constant for the decomposition of ammonia at the final temperature of the mixture is 
.
1) Molecular formula of ammonium sulfide
(NH4)2 S
2) That means that there are 2*4 = 8 atoms of hydrogen in each molecule of ammoium sulfide, so in 5.20 mol of molecules will be 8 * 5.20 mol = 41.6 moles of atoms of hydrogen
3) To pass to number of atoms multiply by Avogadro's number: 6.022 * 10^23
41.6 moles * 6.022 * 10^23 atoms / mol = 250.5 * 10^23 = 2.50 * 10^25 atoms
Answer: 2.50 * 10^25
Cant really see the picture
