Question

Um cozinheiro utilizou 4kg ou 4000g de açúcar (C12 H22 O11) para preparar doces. Quantos mols há nessa massa?
A)10,6 mols B) 11,69mols C)10mols D) 11,9 mols

Answer 1

Cálculo da massa molar:

$\mathsf{m_{C_{12}H_{22}O_{11}}=12.12+22.1+11.16=342~g/mol}$

$\: \: \mathsf{342\to~1~mol}\\\mathsf{4000\to~x}$

$\mathsf{342x=4000}\\\mathsf{x=\dfrac{4000}{342}}\\\large\boxed{\boxed{\boxed{\boxed {\mathsf{x=11,69~mols}}}}}$

$\huge\boxed{\boxed{\boxed{\boxed{\mathsf{\maltese~~alternativa~~b}}}}}$