2- Tern o valor de 14.5 a 500 K . As concentraçōes de metanol e de de carbono foram medidas nesta temperatura em condiçōes de equilibrio. encontrando-se respectivamente \( 0,145 \mathrm{~mol} / \mathrm{L} \) e \( 1 \mathrm{~mol} / \mathrm{L} \). com base nesses dados, qual a concentracão de nitrogênio em mol/l?

5. ¿Cuántos mililitros de una solución \( 0.5 \mathrm{~N}_{\text {de }} \mathrm{H}_{2} \mathrm{SO}_{4} \) reaccionará con 10 mL de una solución 0.25 M de NaOH ?

\( \left. \begin{array} { l } { * 1 , \vec { 25 } = \frac { 125 - 2 = 124 } { 9 } + \frac { 1 } { 9 } } \\ { 0124 } \\ { \frac { - 9 } { 34 } } \end{array} \right. \)

Name the property which justifies the conclusion. 2. Given: \( -3=x-7 \) Conclusion: \( -3+7=x-7+7 \) 3. Given: \( -13 x=-247 \) Conclusion: \( x=19 \)

2. Compare os numeros decimais a seg \( \begin{array}{ll}\text { a) } 0,05 & 5 \% \\ \text { c) } \frac{3}{100} & 30 \%\end{array} \)

Dr. Pell starts a side hustle selling mathematically-themed jewelry on Etsy. He sells Bracelets for \( \$ 20 \) and Charms for \( \$ 15 \). Suppose that two weeks ago he sold 20 total units and made \( \$ 340 \). Let \( x \) and \( y \) denote the number of Bracelets and Charms sold, respectively. (a) Write a linear expression which expresses that 20 items were sold and graph the equation in the \( (x, y) \)-plane. Find three distinct combinations of Bracelets and Charms which satisfy the equation and identify them on the graph.