Recent content by miiizpiiink18

Calculating the excess reagent remaining at the end of the reaction..help? SO here's the question: Q: Copper (II) Sulfide (0.600mol) is treated with 1.40mol of nitric acid. Here's the equation: 3 CuS + 8 HNO3 --> 3 Cu(NO3)2 + 3 S + 2 NO + 4 H2 A) How many moles of...

How do you know how many valence energy level you have by just looking at the periodic table? because you know that the group number tells the valence electrons right. :) so what about valence energy level? :D

Q: Why is the 11th electron of the sodium atom located in the third energy level rather than in the second energy level? xD

I'm not sure but I found this... [When an electron makes a transition from one energy level to another, the electron emits a photon with a particular energy. These photons are then observed as emission lines using a spectroscope. The Lyman series involves transitions to the lowest or ground...

oh ok :D thank YOU! =] ♥

oh. so i just put a / on the answers? =] like 1/2?

yes, i know amu and g/mol

Q: The actual mass of one atom of an unknown isotope is 2.18 x 10^-22g. Calculate the atomic mass of this isotope. `How do I calculate it? help =]

Q: An average dimension for the radius of an atom is 1.0 x 10^-8 cm, and the average radius of the nucleus is 1.0 x 10-^13 cm. Determine the ratio of atomic volume to nuclear volume. Assume that the atom is spherical. [V=4/3(pi)r^3] I already have the volume for both, but how can I determine...