Chapter 1, Problem 1.131E

Asking for Q 9

Q1. The net potential energy between two adjacent ions, EN, is represented by A В EN pn where En is the net energy in Joule (J), A and B are constants with values of 1.436 J.m and 7.32 × 106 J.nm°, r is the interatomic distance between the two ions in nanometer (nm), and n is a positive number with a value of 8. Using these information, determine the equilibrium spacing between the two ions in nanometer (nm).

Normal body temperature is 98.4°F.  Use your Celsius temperature from the above question (81) to calculate this temperature in Kelvin. To determine the conversion factors (if you can’t remember them), use the following: Freezing point of water = 0 oC = 273.15 K.  Boiling point of water = 100 oC = 373.15 K. Use the correct number of significant figures in your answers.

Calculate the amount of heat needed to boil 139. g of water (H₂O), beginning from a temperature of 85.3 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 00 x10 X S

A chemist adds 70.0mL of a 2.40 x 10^−4 mol/L copper(II) fluoride (CuF2) solution to a reaction flask. Calculate the micromoles of copper(II) fluoride the chemist has added to the flask. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of aluminum chloride (AICI,) by measuring out 40. g of aluminum chloride into a 100. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits. mol/L X10

A chemist prepares a solution of magnesium fluoride MgF2 by measuring out 0.00387μmol of magnesium fluoride into a 100.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /μmol/L of the chemist's magnesium fluoride solution. Be sure your answer has the correct number of significant digits.

Calculate the micromoles of silver(II) oxide the chemist has added to the flask. Round your answer to 3 significant digits.

Which statement about temperature is TRUE? A small block of aluminum sitting in a beaker of boiling water for several hours will have a different temperature than the boiling water. Temperature is a measure of the average kinetic energy of particles in a substance. Temperature moves from colder objects to hotter objects. A cup of boiling water and a bucket of boiling water will have different temperatures because they have different volumes.