Ice substance

Water is a substance with some very unusual properties. Based on a comparison of the water molecule and the structure of ice explain (a) why ice is less dense than water, and (b) why increasing pressure, within a certain temperature range, causes ice to melt. (c) why is it not possible to convert ice to liquid water by applyi ...continues

Enthalpy of soultion

Compare the dissolution of various salts. Compare the dissolution of sodium hydroxide with that of sodium chloride. {a} HOW DO THE ENERGY CHANGES FOR THE OVERALL PROCESSES COMPARE? {b} DISCUSS THE DIFFERENCE IN MAGNITUDE OF EACH OF THE THREE STEPS FOR DISSOLUTION OF THE TWO COMPOUNDS.

Henry's Law

Illustrate the relationship between a pressure of a gas above a liquid and the solubility of the gas in the liquid. Determine the concentration of CO2 in a carbonated beverage bottled under 4.0 atm of CO2. (a) If the mole fraction of CO2 in the air is 0.00355, how many times more concentrated is the CO2 in the unopened bottle ...continues

Colligative Properties

Show how the boiling point and freezing point of water are affected by the addition of various solutes. (a) If you were to dissolve 10 g sodium chloride in 500 g water, what would be the boiling point of the solution? (b) If you were to heat the solution in part (a), and continue heating it as it boiled, what would happen to th ...continues

ethanol/acetic acid

Ethanol and acetic acid have very similiar molor masses and hoth exhibit hydrogen bonding. In which of these two compiunds id hydrogen bonding a more significant component of the overall intermolecular forces? Support your answer using date from the Equilibrium Vapor Pressure

Changes of State

Show the heating curve of a subtance that melts and then vaporizes.. (a)sketch the heating curve of carbon dioxide at atmospheric pressure, starting at -100 C and ending at 30 C. (b) Sketch the same heating curve as it would appear at a pressure of 10 atm. (c) Under what conditions would the heating curve resemble the one you ...continues

structure of ice

Compare the structure of ice with the structure of diamond. If you rotate the structures just right, you will see distinct similarities, namely sp3 hybridization (of owygen and carbon, respectively) and the hexagonal arrangement of atoms. Given this similarity, explain why ice can be melted by applying pressure whereas diamond ...continues

particles

The environmental protection agency (EPA) has proposed a new standard for microparticulates in air: For particles up to 2.5 um in diameter, the maximum allowable amount is 50 ug/m3. If your 9.2 ft x 13.8 ft x 8.6 ft dorm room just meets the new EPA standard, how many of these particles are in your room? (Assume the particles are ...continues

density

Nickels are composed of 25% nickel and 75% copper by mass, what is its density (d of nickel = 8.902 g/cm3; d of copper = 8.95 g/cm3)?

This solution shows how to calculate the density of a metal by submerging it in a graduated cylinder.

A graduated cylinder weighs 46.3 g when empty and holds 35.1 ml water (d = 1.00 g/cm3). An unknown metal is submerged into the water and brings the total volume to 58.1 ml and the mass of the cylinder and contents to 332.3 g. What is the density of the metal?