Author Question: Briefly explain why carbon and silicon can form oxides with such different physical properties, ... (Read 100 times)

jilianpiloj · **on:** Aug 27, 2018

Briefly explain why carbon and silicon can form oxides with such different physical properties, gaseous CO2 and solid SiO2.

What will be an ideal response?

Question 2

How many grams of AgNO3 are needed to make 250. mL of a solution that is 0.135 M?

A) 0.0917 g
B) 0.174 g
C) 5.73 g
D) 9.17 g

ASDFGJLO · **Reply #1 on:** Aug 27, 2018

Answer to Question 1

Carbon atoms are small enough to form bonds with oxygen due to the overlap of p orbitals, resulting in the formation of double C O bonds. Consequently, CO2 forms individual molecules that interact with each other via weak London dispersion forces. Silicon atoms are too large and form only single bonds with oxygen, four such bonds per each silicon atom, with each oxygen atom bridging between two silicon atoms, resulting in a covalent-network solid.

Answer to Question 2

C