HCI is one of the most common acids out of the following
Answer:
Explanation:
complete combustion reaction of ethane is given by the reaction
2C2H6+7O2..............4CO2+6H2O
no of moles in 34 grams of O2=34/32=1.063
7mole of O2 produced 6 moles of H2O
therefore 1.063 moles of O2 produced=1.063*6/7=0.9 moles
now 0.9 moles of H2O contain how much grams=0.9*18=16.2 grams
Answer:
![E=9.62\times 10^{-21}\ J](https://tex.z-dn.net/?f=E%3D9.62%5Ctimes%2010%5E%7B-21%7D%5C%20J)
Explanation:
Given that,
The wavelength of a microwave is 7.42 mm or 0.00742 m
No. of photons, n = 359
We need to find the energy produced by this no of photons. It can be given by the formula as follows :
![E=\dfrac{nhc}{\lambda}\\\\E=\dfrac{359\times 6.63\times 10^{-34}\times 3\times 10^8}{0.00742}\\\\=9.62\times 10^{-21}\ J](https://tex.z-dn.net/?f=E%3D%5Cdfrac%7Bnhc%7D%7B%5Clambda%7D%5C%5C%5C%5CE%3D%5Cdfrac%7B359%5Ctimes%206.63%5Ctimes%2010%5E%7B-34%7D%5Ctimes%203%5Ctimes%2010%5E8%7D%7B0.00742%7D%5C%5C%5C%5C%3D9.62%5Ctimes%2010%5E%7B-21%7D%5C%20J)
or
![E=9.62e^{-21}\ J](https://tex.z-dn.net/?f=E%3D9.62e%5E%7B-21%7D%5C%20J)
So, the required energy is
.
5 is the atomic number, 11 is the atomic mass and boron is the element