Answer:
with the help of adding mass of protons and neutrons
Explanation:
measuring the atomic mass of an element , we add up the proton mass with the neutron mass it gives us the atomic mass
There are 2.06 x 10²⁴ atoms
<h3>Further explanation
</h3>
The mole is the number of particles (atoms, molecules, ions)contained in a substance
1 mol = 6.02.10²³ particles
Moles can also be determined from the amount of substance mass and its molar mass

Answer:
i believe it's C.
Explanation:
if it's wrong i apologize, if you are looking for an "Extensive tabulation of absorption coefficients of heated air including both molecular and atomic contributions" the equation can be used to calculate that step
No I do not have the answers