Explain Lewis electron dot formula of H, O, N, H2, O2, and N2

Imagine that you own a property that is exactly 2.2 acres large. you want to sell your property, but your realtor tells you that you cannot sell your land by the acre. in order to sell your land you need to determine the area you own in units of square meters? given that there are 1.6 kilometers in 1 mile and 640 acres in 1 square mile, what is the area of land that you own in square meters square meters?

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer