Calcule la masa de cromato sódico, Na2CrO4 necesario para preparar 200 g de una solución al 20,0% de Na2CrO4.

0.09 moles of sodium sulfate in 12 ml of solution

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?

What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-