Question

Quantas moléculas de gás oxigênio são consumidas ao serem formadas 4,0 x 10²³ moléculas de água?


2 H₂(g) + 1 O₂(g) → 2 H₂O(1)

precisa ter conta

Answer 1

$\boxed{\begin{array}{l}\sf 2H_2(g)+O_2(g)\longrightarrow2H_2O(l)\\\sf 6\cdot10^{23}~mol\acute eculas~de~O_2\longrightarrow12\cdot10^{23}~mol\acute eculas~de~H_2O\\\sf x\longrightarrow 4\cdot10^{23}~mol\acute eculas~de~H_2O\\\sf 12\cdot10^{23} x=6\cdot 10^{23}\cdot 4\cdot10^{23}\\\sf x=\dfrac{24\cdot10^{46}}{12\cdot 10^{23}}\\\\\sf x=2\cdot10^{23}~mol\acute eculas~de~H_2O\end{array}}$