Calculate the mole fraction of NaCl in a solution prepared by dissolving 117 g NaCl in 1.11 kg H2O.  Molar mass of NaCl = 58.4398 g/mol; H2O = 18.015 g/mol

For the reaction given below, 2.00 moles of A and 3.00 moles of B are placed in a 6.00-L container.           A(g) + 2B(g)  C(g) At equilibrium, the concentration of A is 0.232 mol/L. What is the value of K? STATE JUST YOUR ANSWER INCLUDING UNITS IN THE TEXT BOX BELOW. Do not show work in the text box.  # your question on scratch paper and label answer,  Include units   If your number is in scientific notation use the superscript or subscript buttons in the task button up in the task bar above. Show all work or receive no credit Show work to webcam upon completion of this problem.  Show units and chemical name or formulas if applicable.   Spelling counts.  Sig Figs will not count unless otherwise stated.  You will be asked to scan all your work at the end of the exam.

A sample consisting of CO2(g) and CO2(s) at equilibrium at –78°C and 1 atm pressure is heated to –30°C and the pressure is increased to 8 atm. Based on the phase diagram below, what will happen?

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What volume of a 0.687 M solution of CaCl2 contains 1.28 g of solute?

 What is the hybridization of the following molecule?

Which of the following is the correct order of boiling points for KNO3, CH3OH, C2H6, Ne?

What is the name of this molecular geometry?

In the Lewis structure for ICl2–, how many lone pairs of electrons are around the central iodine atom?

Is the following molecule polar or nonpolar?