Which of the following has the largest third ionization energy? Ti, V, Cr, Sc, Ca
1) Determine the ionic packing factor for the imaginary ceramic XY, which has the structure shown below. The ionic radii of X and Y are 0.191 and 0.764 nm, respectively. The ions are touching along the dotted lines shown in this figure. The ionic packing factor is the same as the atomic packing factor. (15 pts.) 7--- -
Which of the following compounds has the lowest van't Hoff factor? What is the van't Hoff factor of NaNO3, Na3PO4, Li2CO3, MgCl2? I calculated them all to be (in order) a van't Hoff factor of 4, 7, 5, and 3. However the lowest van't Hoff factor went to NaNO3. Why?
30. which if the following atoms has the greatest metalic chracter? A) Au, B) Cs C) Ti D) Cu E)Be
Which of the following ions is in the lowest oxidation state? A. Cr in Cr2O2−7 B. C in C2O2−4 C. All are equal D. S in S2O2−3
Balance the following electrochemical equation for an acidic environment. H_2CrO_4 + Ti rightarrow Cr^3+ + Ti^4+
Which of the following has the lowest boiling point? Which of the following has the lowest boiling point? A) CsH12 B) C7H16 C) CgH20 D) C11H24 E) C13H28
Place the following structures in order based on their packing ratio (from lowest to highest). -condensed chromosome -condensed chromatin in the interphase nucleus -DNA double helix alone (not associated with proteins) -supercoiled chromatin fibers -a nucleosome
which one of the following substances is most likely to be oxidized A. Ni B. Au C. Al D. Na E F2
State and explain which one of the following pair is more stable. a) [Cr(NMe3)6]3+ or [Cr(PMe3)6]3+ b) CoF2 or CoF3 c) Al(CH3)3●N(CH3)3 or Al(CH3)3●P(CH3)3