Question

Quantos mols há em 3 x 10²⁴átomos de cobalto?​

Answer 1

$\large\boxed{\begin{array}{l}\sf 1~mol\longrightarrow 6,02\cdot10^{23}~\acute atomos\\\sf x\longrightarrow 3\cdot10^{23}\acute atomos\\\sf 6,02\cdot10^{23}\cdot x=3\cdot10^{24}\\\sf x=\dfrac{3\cdot\diagup\!\!\!\!\!\!1\!0^{24}}{6,02\cdot\diagup\!\!\!\!\!\!1\!0^{23}}\\\\\sf x=0,498\cdot10\\\sf x=49,8~mols\end{array}}$