Question

dadas as massas atômicas: hidrogênio= 1 g , oxigênio = 16 g. Calcule a massa atômica de 2,5 mol's de H2O

Answer 1

Olá,

H2O= 2+16= 18g/mol

1mol de H2O--------------------18g/mol
2,5 mol de H2O------------------ x

x= 45g/mol

att...

Answer 2

$m_{H_{2}O}=2\times1+16=18g/mol$

$\mathsf{18g\rightarrow\,1\,mol} \\\mathsf{x\,g\rightarrow\,2,5\,mols}$

$\mathsf{x=2,5\times18}\\\mathsf{x=45g/mol}$