Chapter 2

Oxygen (O) is a(n) \(\longrightarrow\) the oxygen we breathe \(\left(\mathrm{O}_{2}\right)\) is a(n) ; and the carbon dioxide we exhale is a(n) a. compound; molecule; element b. atom; compound; element c. element; atom; molecule d. atom; element; molecule e. element; molecule; compound

When electrons are shared equally between atoms, they form: a. a polar covalent bond. b. a nonpolar covalent bond. c. an ionic bond. d. a hydrogen bond. e. a van der Waals force.

Due to a sudden hormonal imbalance, a patient's blood was tested and shown to have a pH of \(7.5 .\) What does this pH value mean? a. This is more acidic than normal blood. b. It represents a weak alkaline fluid. c. This is caused by a release of large amounts of hydrogen ions into the system. d. The reaction \(\mathrm{H}_{2} \mathrm{CO}_{3} \rightleftharpoons \mathrm{HCO}_{3}^{-}+\mathrm{H}^{+}\) is pushed to the left. e. This is probably caused by excess \(\mathrm{CO}_{2}\) in the blood.

You place a metal pan full of water on the stove and turn on the heat. After a few minutes, the handle is too hot to touch but the water is only warm. How do you explain this observation?