Question

Quantos mols há em 12x10^23 átomos de ouro? *

1
2
3
4

Answer 1

$\Large\boxed{\begin{array}{l}\sf 1~mol\longrightarrow 6\cdot 10^{23}~\acute atomos\\\sf x\longrightarrow 12\cdot10^{23}~\acute atomos\\\sf 6\cdot 10^{23}x=12\cdot10^{23}\\\sf x=\dfrac{12\cdot10^{23}}{6\cdot10^{23}}\\\\\sf x=2~mols\end{array}}$