Question

em 90L de um gás, há quantos mols?​

Answer 1

$\Large\boxed{\begin{array}{l}\sf 1\,mol\longrightarrow 22,4\,L\\\sf x\,mols\longrightarrow90\,L\\\sf 22,4x=90\cdot1\\\sf 22,4x=90\\\sf x=\dfrac{90}{22,4}\\\\\sf x=4,01\,mols\end{array}}$