a. From the given data, calculate the volume of the irregularly – solid and      determine the density and specific gravity of the irregularly shape – solid. Final volume of water (increase in volume)                5.30 mL Initial volume of water                                                5.00 mL        Volume of irregularly – shape solid (a –b)                  ________                                               mass of the irregularly shape – solid = 3.84 g   b.  The temperature of the water in the glass is 28.5 0 C and the boiling temperature of the water is 211.5 0 Convert the temperatures given into different temperature scale in degree Celsius scale (0C) to degree Fahrenheit (0F), Kelvin (K) and Rankine (R)   scales.                  c = 0 F - 32 / 1.8                                   0 F = 1.8  (0 C) + 32                  K = 0 C + 273.15                                       R = 0 F + 460

The surface tension and viscosity values for diethyl ether, acetone, ethanol, and ethylene glycol are shown here. (a) Explain their differences in viscosity in items of the size and shape of their molecules and their IMFs. (b) Explain their differences in surface tension in items of the size and shape of their molecules and their IMFs:

Pentylamine, CH3CH2CH2CH2CH2NH2, is a liquid that boils at 104C and has a viscosity of 10 10 4 kg/(m s). Triethylamine, (CH3CH2)3N, is a liquid that boils at 89C and has a viscosity of about 4 10 4 kg/(m s). Explain the differences in properties of these two compounds.

Use the web to research the elastic modulus and yield strength of carbon fiber composites. How do these materials compare to aluminum, steel, and titanium?

Although steel is denser than water, a steel needle or paper clip placed carefully lengthwise on the surface of still water can be made to float. Explain at a molecular level how this is possible: Figure 10.67 (credit: Cory Zanker)

Follow the step-wise process outlined in Problem 31 to calculate the amount of heat involved in condensing 100.00 g of benzene gas (C6H6) at 80.00C to liquid benzene at 25.00C. Use Tables 8.1 and 8.2 for the specific heat, boiling point, and heat of vaporization of benzene.

Open the PhET States of Matter Simulation (http://openstaxcollege.org/l/16phetvisual) to answer the following questions: (a) Select the Solid, Liquid, Gas tab. Explore by selecting different substances, heating and cooling the systems, and changing the state. What similarities do you notice between the four substances for each phase (solid, liquid, gas)? What differences do you notice? (b) For each substance, select each of the states and record the given temperatures. How do the given temperatures for each state correlate with the strengths of their intermolecular attractions? Explain. (c) Select the Interaction Potential tab, and use the default neon atoms. Move the Ne atom on the right and observe how the potential energy changes. Select the Total Force button, and move the Ne atom as before. When is the total force on each atom attractive and large enough to matter’? Then select the Component Forces button, and move the Ne atom. When do the attractive (van der Waals) and repulsive (electron overlap) forces balance? How does this relate to the potential energy versus the distance between atoms graph? Explain.

How many grams of water at 0C will be melted by the condensation of 1 g of steam at 100C?

When I mole of benzene is vaporized at a constant pressure of 1.00 atm and at its boiling point of 353.0 K, 30.79 kJ of energy (heat) is absorbed and the volume change is +28.90 L. What are E and H for this process?

Consider a sealed container half-filled with water. Which statement best describes what occurs in the container? a. Water evaporates until the air is saturated with water vapor; at this point, no more water evaporates. b. Water evaporates until the air is overly saturated (super-por: at this point, no more water evaporates. Water evaporates until the air is overly saturated (supersaturated) with water, and most of this water recondenses; this cycle continues until a certain amount of water vapor is present, and then the cycle ceases. c. Water does not evaporate because the container is sealed. d. Water evaporates. and then water evaporates and recondenses simultaneously and continuously. e. Water evaporates until it is eventually all in vapor form. Explain each choice. Justify your choice, and for choices you did not pick. explain what is wrong with them.