The speed of sound is given by the formula
Speed of sound = square root (Young's Modulus/density)
Young's modulus for gold = 78 GPa which is 7.8 * 10^10 Pa
Speed of sound = (7.8 * 10^10 / 19.3 ) = sqrt (4.04 * 10^9 )
Speed of sound = 6.36 * 10^4 m/s <<<=== answer.
As we go farther from the nucleus, the energy of orbitals increase. Also, the farther an electron is from the nucleus, the more repulsion it has to face because of other electrons(more screening effect) and hence it is easier to remove that electron.so n=1 which is very close to the nucleus has least energy and n=7 which is far away from nucleus has higher orbital energies.
Answer:
Easy!!! the answer is 2.2moles
Explanation:
2.2 moles
1. CV
2.0.4×5.50
3.n=2.2 moles
Hope this helps!!!