What is a relative mass of an electron

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

What are the first three quantum numbers for the electrons located in subshell 2s?

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action