Recent content by Astronomer1

700 micrograms? I don't know...

Thanks everyone. It turns out that the teacher made an error in 1 of the masses. So the empirical formula (re-calculated) IS still C11H17N3O8. But now I'm stuck on Part b. I calculated the molar mass of tetrodotoxin which is 319g/mol. Does Avogradro's # play a role here in the calculation? I'm...

1. The Question: The pufferfish is an Asian delicacy, but also contains a deadly toxin, tetrodotoxin. The LD50 (lethal dose to kill 50% of the population) is 10 micrograms/kg. An analysis of 18.34 mg of tetrodoxin produced 27.82 mg of carbon dioxide, 13.2 mg of nitrogen dioxide, and 8.83 mg...

1. Regarding: Transition metals of the Periodic Table 2. Here's my question: the D-Block transition metals will always lose e- (& never gain e-'s) to fully fill (or half-fill) their d-subshells, right? 3. Given what I learned about stable, fully-filled and half-filled subshells...

1. Rydberg's Constant: what's the difference between R (sub) infinity & R (sub) H? 2. R (sub) H = -2.1799x10^-18 J | R (sub) infinity = 1.0974x10^7 1/m (m = meters) 3. No attempt to solve the Q yet; I don't know what's the difference between the two? What do these 2 stand for?

Hi everyone. In my class we are now learning about Quantum theory & the whole "shananigans". Yesterday we talked about orbitals (s, p, d, f, g). In one of the classes my Physics teacher said that the letter "l" (lowercase L) indicates the sub-shell and "m (sub) l" the location of the orbits...

Hi all, this is 1 of my homework questions. The resolution of microscopes is approximately half the illumination wavelength. a) Assuming a visible microscope has an average wavelength of 550 nm, what is the resolution limit? I'm not sure what my teacher means by resolution limit?