7. Which one of the following statements regarding \( K_{w} \) is false? \( \begin{array}{llll}\text { (a) } p K_{w} \text { is } 14.00 \text { at } 25^{\circ} \mathrm{C} & \text { (b) The value of } K_{w} \text { is always } 1.0 \times 10^{-14} & \text { (c) } K_{w} \text { changes with } \\ \text { temperature } & \text { (d) The value of } K_{w} \text { shows that water is a weak acid } & \text { (e) } K_{w} \text { is known as } \\ \text { the ion product of water. }\end{array} \)

O. Considara los vactores \( \vec{u}-(-2,5), \vec{v}-(3,-2) \) y \( \vec{c}-(-1,-4) \), ¿Cuál os ol vector \( \vec{u}+2 \vec{v}-\vec{c} \) ?

a. Qual a temática comum tratada nos textos?

inventions were amazing! \( \begin{array}{llll}\text { a. people } & \text { b. peoples } & \text { c. peoples' } & \text { d. people's }\end{array} \)

In A Long Walk to Water, Salva's story is based on real historical events, while some details may have been altered for storytelling purposes. Think about a historical event you've leamed about in school. If you were writing a novel based on that event, what is one thing you might change or add to make it more interesting for readers? Why would you make that change?

4na cometa se ha quedado encedada en un poste de 6 metros de altura y el nikio que la tenia ha dejado el carrete de hilo en el suelo a so metros del poste. ¿Cudl es la longitud del hito que va desde el suelo a la cometa?