Draw a schematic picture of a MSN being used as a molecular engineering design selective drug delivery vehicle. Label all key components of the design.

How does a MSN differ from amorphous silica so that it has improved biocompatibility?

Why do nonmetals tend to form anions rather than cations?

Use the fundamental structure of mesoporous silica nanoparticles (MSN) to explain why they have such a large surface area.

Describe why treatments like chemotherapy for cancer patient often have serious side effects. What is a strategy that could lessen such side effects?

Describe what happens to the shape about the carbon atoms when a $\mathrm{C}=\mathrm{C}$ double bond undergoes an addition reaction in which it is converted into a $\mathrm{C}-\mathrm{C}$ single bond.

Describe why a central atom with four bonding pairs and one lone pair will have the lone pair in an equatorial rather than an axial location.

A gas mixture containing 85.0 mole% $\mathrm{N}_{2}$ and the balance n-hexane flows through a pipe at a rate of $100.0 \mathrm{m}^{3} / \mathrm{h}$. The pressure is 2.00 atm absolute and the temperature is $100^{\circ} \mathrm{C}$. a. What is the molar flow rate of the gas in kmol/h? b) Is the gas saturated? If not, to what temperature $\left(^{\circ} \mathrm{C}\right)$ would it have to be cooled at constant pressure in order to begin condensing hexane? c) To what temperature $\left(^{\circ} \mathrm{C}\right)$ would the gas have to be cooled at constant pressure in order to condense 80% of the hexane?

Propene has the chemical formula $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}_3$. Describe the overall shape of the molecule by considering the geometry around each carbon atom.

Give approximate values for the indicated bond angles:

(a) $\mathrm{Cl}-\mathrm{S}-\mathrm{Cl}$ in $\mathrm{SCl}_2$,

(b) $\mathrm{N}-\mathrm{N}-\mathrm{O}$ in $\mathrm{N}_2 \mathrm{O}$,

(c) bond angles 1,2 , and 3 in vinyl alcohol.

Which of these molecules would be linear? Which have lone pairs around the central atom?

(a) $\mathrm{XeF}_2$,

(b) $\mathrm{CO}_2$,

(c) $\mathrm{BeF}_2$,

(d) $\mathrm{OF}_2$

Predict the shape of each of the following molecules or ions:

(a) $\mathrm{PH}_4^{+}$,

(b) $\mathrm{OSF}_4$,

(c) $\mathrm{ClO}_2^{-}$,

(d) $\mathrm{I}_3^{-}$

Predict the shape of each of the following molecules or ions:

(a) $\mathrm{IF}_3$,

(b) $\mathrm{ClO}_3^{-}$,

(c) $\mathrm{TeF}_4$,

(d) $\mathrm{XeO}_4$

Predict the geometry of the following species:

(a) $\mathrm{SO}_2$,

(b) $\mathrm{BeCl}_2$,

(c) $\mathrm{SeCl}_4$,

(d) $\mathrm{PCl}_5$