What is the total number of moles of electrons needed to produce one mole of mg metal from mgcl2?

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

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

Match the mixture with the substance// i really need on this guys (it’s a pic btw)