Question

Quantos átomos de carbono há em 92 g de C2H6O ?

Dados:
O- 16g/mol
C= 12g/mol
H= 1g/mol
Constante de Avogrado
6 X 10 23

Answer 1

Caso tenha problemas para visualizar a resposta experimente abrir pelo navegador https://brainly.com.br/tarefa/36980270

                                                                                         

$\rm\underline{observe~com~atenc_{\!\!,}\tilde ao~os~dados~refente~ao~composto}\\\boxed{\sf C_2H_6O}:\\\boxed{\begin{array}{c}\sf1~mo\ell~de~mol\acute eculas\\\sf6\times10^{23}mol\acute eculas\\\sf9~mols~de~\acute atomos\\\sf9\cdot6\times10^{23}\acute atomos\\\sf46~g/mol\end{array}}\\\it\underline{qual~destas~relac_{\!\!,}\tilde oes~ajudam~a~resolver~nosso~problema?}$

$\rm a~resposta~\acute e~a~4^{\underline a}~e~5^{\underline a}~relac_{\!\!,}\tilde oes.E~por~qu\hat e?\\\sf porque~precisamos~de~uma~relac_{\!\!,}\tilde ao\\\sf que~envolva~a~massa~e~a~quantidade~de~\acute atomos\\\sf expresso~em~termos~da~constante~de~Avogadro.$

$\sf sendo~assim~vamos~solucionar~o~exerc\acute icio.\\\sf 9\cdot6\times10^{23}\acute atomos\longrightarrow 46~g\\\sf x~\acute atomos\longrightarrow 92~g~\\\sf 46\cdot x=92\cdot9\cdot6\times10^{23}\\\sf x=\dfrac{\diagdown\!\!\!\!\!\!92^2\cdot9\cdot6\times10^{23}}{\diagdown\!\!\!\!\!\!46}\\\sf x=2\cdot9\cdot6\times10^{23}\\\sf x=108\times10^{23}\acute atomos\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=1,08\times10^{25}\acute atomos}}}}$