Explain why the spectrum produced by a 1-gram sample of element z would have the same spectral lines at the same wavelengths as the spectrum produced by a 2gram
sample of element z.

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.

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+