Questions from General Chemistry

Q: Suppose that 1.28 g of neon gas and 2.

Suppose that 1.28 g of neon gas and 2.49 g of argon gas are confined in a 9.87-L container at 27 °C. What would be the pressure in the container?

Q: Although the valence electron pairs in ammonia have a tetrahedral arrangement,

Although the valence electron pairs in ammonia have a tetrahedral arrangement, the overall geometric structure of the ammonia molecule is not described as being tetrahedral. Explain.

Q: Small quantities of hydrogen gas can be prepared in the laboratory by

Small quantities of hydrogen gas can be prepared in the laboratory by the addition of aqueous hydrochloric acid to metallic zinc. Zn(s) + 2HCl(aq) ZnCl2(aq) + H2(g) Typically, the hyd...

Q: For the indicated atom in each of the following molecules or ions

For the indicated atom in each of the following molecules or ions, give the number and arrangement of the electron pairs around that atom. a. As in AsO43- b. Se in SeO42- c. S in H2S

Q: What does it mean to say that a bond is polar?

What does it mean to say that a bond is polar? Give two examples of molecules with polar bonds. Indicate in your examples the direction of the polarity.

Q: Consider the following molecules: CH3OH, CH4, H2O, C2H6

Consider the following molecules: CH3OH, CH4, H2O, C2H6. a. Draw the Lewis structure for each molecule, and indicate whether each is polar or nonpolar. b. At room temperature, two of these compounds...

Q: How is the phenomenon of temperature explained on the basis of the

How is the phenomenon of temperature explained on the basis of the kinetic molecular theory? What microscopic property of gas molecules is reflected in the temperature measured?

Q: Explain, in terms of the kinetic molecular theory, how an

Explain, in terms of the kinetic molecular theory, how an increase in the temperature of a gas confined to a rigid container causes an increase in the pressure of the gas.

Q: Which substance in each pair would be expected to have a lower

Which substance in each pair would be expected to have a lower boiling point? Explain your reasoning. a. CH3OH or CH3CH2CH2OH b. CH3CH3 or CH3CH2OH c. H2O or CH4

Q: Using the VSEPR theory, predict the molecular structure of each of

Using the VSEPR theory, predict the molecular structure of each of the following polyatomic ions. a. dihydrogen phosphate ion, H2PO4- b. perchlorate ion, ClO4- c. sulfite ion, SO32-