Please help me... (I'm sick at home, so my teacher wasn't able to teach me this... Also please do not just give a random answer, please answer it correctly)

How many atoms are there in 5.70 mol of mg

Using the first volume and temperature reading on the table as v1 and t1, solve for the unknown values in the table below. remember to use the rules of significant figures when entering your numeric response.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit