How many moles of lithium are in 15 atoms of lithium?

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Answer 1 · 2018-02-15T12:40:24

Here the mole concept is used.

Since,

#"atoms" = "moles" xx "Avagadro's no."#

#15 = "moles" x× 6.022 xx 10^24"atoms/mol"#

which implies

#"15 atoms"/(6.022 × 10^24 "atoms/mol") = "moles"#

So

# 2.5 x× 10^(-24) = "moles of lithium"#