Verdadero o falso: a) La fórmula de los compuestos iónicos indica el número real de átomos en la molécula.
b) Las sustancias simples formadas por átomos aislados o por cristales se representan solo por el símbolo de su elemento.

In a reaction (at equilibrium) that makes more moles of gas than it consumes, what is the effect of increasing the pressure?

To prevent the presence of air, noble gases are placed over highly reactive chemicals to act as inert "blanketing" gases. a chemical engineer places a mixture of noble gases consisting of 4.37 g of he, 13.36 g of ne, and 36.65 g of kr in a piston-cylinder assembly at stp. calculate the partial pressure in torr of kr.

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.