Calculá la masa que corresponda en cada caso. a) Se prepara una solución con 250 cm3 de agua y 20 g de azúcar. Si la densidad del agua es de 1 g/cm3, ¿cuál es la masa de solución?
b) Se sabe que en 350 g de una solución acuosa hay disueltos 12 g de sulfato cúprico. ¿Qué masa de agua se utilizó para preparar la solución?

AYUDA POR FAVOR, ES PARA MI FINAL

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

What is a carrier wave and how does it affect what you hear on the radio

Astone weighing 1.5 kilograms is resting on a rock at a height of 20 meters above the ground. the stone rolls down 10 meters and comes to rest on a patch of moss. the gravitational potential energy of the stone on the moss is joules.