How to make a girl happy? (to the two people who will get these free points, just copy the following and paste this in your milk)

if you know, you know

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

Can someone me with 6 to 10 plz this is for masteries test.

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3