3) a) ¿Cuál es la masa de 0,77 moles de ácido nítrico (HNO3)? b) Se tiene una muestra de 12,3 moles de cinc, ¿Cuál es su masa?

4) a) Expresar 120 g de sulfato cúprico (CuSO4) en moles
b) En un paquete de 1 kg de azúcar (sacarosa, C12H22O11) ¡Cuántos moles de sacarosa hay?

5) Una pieza de una aleación contiene 3,15 moles de cobre y 2,75 moles de estaño.
a) la masa de cada metal en la pieza
b) la masa total e la pieza
c) la composición centesimal de la pieza (esto es: que porcentaje de la masa corresponde a cada metal o , cada 100 g de la aleación, que masa corresponde a cada metal)

answer; natural resources;

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.