Chapter 2, Problem 2.1E

QUESTION 1 When sodium chloride dissolves in water, how do the water molecules orient around the ions? O A. Water molecules are randomly oriented around the ions. O B. The hydrogen atoms point toward both the sodium and the chloride. O C. The oxygen atoms point toward both the sodium and the chloride. O D. Around sodium the hydrogen atoms point toward the sodium, and around chloride the oxygen atoms point toward the chloride. O E. Around sodium the oxygen atoms point toward the sodium, and around chloride the hydrogen atoms point toward the chloride.

Part A:  Pairs of ions are attracted to each other to build an ionic ________ Your answer   Part B:  Pairs of ions are attracted to each other to build an ionic ________     Part C:  What is the formula for Sodium Chloride?   Part D:  What is the ratio of Sodium ions to Chloride ions in Sodium Chloride? Your answer

The element potassium forms a _______cationanion with the charge . The symbol for this ion is , and the name is . The number of electrons in this ion is .

Draw a formula for each of the following molecules using circular symbols of your choice to represent atoms: a. A diatomic molecule of an element b. A diatomic molecule of a compound c. A triatomic molecule of an element d. A molecule of a compound containing one atom of one element and four atoms of another element

a How many atoms of hydrogen are present in 2.69moles of water? b How many moles of oxygen are present in 1.391022molecules of water?

37. On a certain day a financial website quoted the price of gold at 1,258 per troy ounce (1troyounce=31.1g). What is the price of a single atom of gold (Z=79)?

Table 4 shows data from an experiment to determine the formulas of hydrated barium chloride. Determine the formula for the hydrate and its name.

Classify each compound as ionic or molecular: a.COb.ZnBr2c.CH4d.NaF

Write the symbols and names for two elements whose average atoms have masses that are within 0.3u of each other. Dont look beyond element number 83.