en un acuario debe mantener la concentración de sal similar a la del agua del mar esto es 1.8 gramos de sal disueltos en 50 g de agua cuál es el porcentaje en masa de la sal en la disolución

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.