Que ventajas o desventajas tiene que las propiedades de las sustancias sean distintas de las de las mezclas que forman.?

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Aroller coaster is traveling at 13 mi./s when you purchase a hill that is 400 m long and down the hill exonerate at 4.0 m/s squared what is the final velocity of the posterior found your answer to the nearest number

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released