se sabe que el cuerpo humano posee carbono-14 cuyo periodo de semidesintegracion es 5 730 años, si para determinar restos humanos, hallados en ruinas pre-hispanicas se constato un residuo de 10% de carbono -14 ,¿cual es la antiguedad de dichos restos humanos

What is the nature of the ca-cl bond in a molecule of calcium chloride (cacl2) if the electronegativity value of calcium is 1.0 and that of chlorine is 3.16?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.