De los siguientes conjuntos indique con una cruz los que constituyen un sistema material drogas en un botiquín
solución de sulfato de cobre en agua para verificar su cristalización x
alcohol para desinfectar una herida
hielo, vaso de precipitados, termómetro para determinar su punto de fusión. x
Ayuda es urgente

Agas occupies 475 cm^3 at 313k. find its volume at 367k. you must show all of your work to receive credit. be sure to identify which of the gas laws you will be using

What is a metal replacement reaction

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?