Answer:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Aluminium, or 26.981538 grams.
<h3>Further explanation</h3>
1.Atomic Number (Z) = Mass Number (A) - Number of Neutrons
neutrons = mass number-atomic number
Atomic mass Cl-37= 17
Mass number Cl-37=37
Neutrons = 37-17=20
2. Mass atom X = mass isotope 1 . % + mass isotope 2.%...
![\tt atomic~mass~X=0.0224\times 88+0.7832\times 90+0.1944\times 91=90.1](https://tex.z-dn.net/?f=%5Ctt%20atomic~mass~X%3D0.0224%5Ctimes%2088%2B0.7832%5Ctimes%2090%2B0.1944%5Ctimes%2091%3D90.1)
3. The energy in one photon can be formulated as
![\large{\boxed{\bold{E\:=\:h\:.\:f}}}](https://tex.z-dn.net/?f=%5Clarge%7B%5Cboxed%7B%5Cbold%7BE%5C%3A%3D%5C%3Ah%5C%3A.%5C%3Af%7D%7D%7D)
f = c / λ, so :
![\tt E\approx f\approx \dfrac{1}{\lambda}](https://tex.z-dn.net/?f=%5Ctt%20E%5Capprox%20f%5Capprox%20%5Cdfrac%7B1%7D%7B%5Clambda%7D)
Energy is directly proportional to frequency and inversely proportional to the wavelength
So, as the frequency of photon increases, the energy of photon increases
4. Based on answer number 3 :
A. The wavelength becomes longer, and the energy decreases
Mg(NO3)2 => <span>Magnesium nitrate
hope this helps!</span>
Answer:
newtons law of roller skated duh