Question

número de mols existente em 9 . 10E25 moléculas de O2 é:

a) 1,5

b)15

c)150

d) 0,15

e)0,015

ME AJUDEM PFV​

Answer 1

$\large\boxed{\begin{array}{l}\sf 1~mol~de~mol\acute eculas\longrightarrow 6\cdot10^{23}~mol\acute eculas\\\sf x\longrightarrow 9\cdot10^{25}\\\sf 6\cdot10^{23}x=9\cdot10^{25}\\\sf x=\dfrac{9\cdot10^{25}}{6\cdot10^{23}}\\\sf x=1,5\cdot10^{2}\\\sf x=150~mols\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~c}}}}\end{array}}$