Cual es el exceso de electrones respecto al numero de protones en un cuerpo cuya carga es de -21.725 e?

Write the complete balanced equation for the reaction between lead (iv) oxide (pbo2) and water (h2o).

Consider the point on the plot where 10.0 g of naoh have been added. what amount of naoh, in moles, has been added? 0.308 mol fecl3 initially present

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.