Varuable, In algebra, a symbol (usually a letter) standing in for an unknown numerical value in an equation :)
Positive
And Negative for oxygen.
Advantage: Identifications
Disadvantage: Disease Screening
6.023*1023 He atoms=1 mole He
1.23×1024 helium atoms=1.23×1024/6.023*1023 =2.042 mole He
one mole He=4.0 gm
2.042 mole He=2.042*4.0=8.168 gm
answer in grams of Helium is 8.168 gm
