General Questions and Answers

H S I2 N H O 7 Rank the compounds above from weakest to strongest in terms of intermolecular forces Justify your response

Use the following data to determine the rate law for the chemical reaction F2 g 2 CIO2 g 2 FCIO2 s Round your orders to the nearest tenths place Provide the correct value of the rate constant k with units 6 1 2 3 Trial Initial Rates Data for Given Reaction 0 10 0 10 0 20 F M 0 10 0 40 0 10 CIO M Initial Rate M s 1 21 x 103 2 38 x 10 3 6 84 x 10 3

penny has a mass of 0 0027 kilograms and a volume of 0 48 milliliters et up the problem below and calculate the density of the penny in grams milliliter 0027 kg 0 48 mL X 1000 ml ased on your calculation will the penny float or sink in water rag and drop your selection from the following list to complete the answer 1000 kg g mL 1 mL 1000 g 1000 L

mplete the table below by writing the symbols for the cation and anion that make up each ionic compound The first row has been completed for you lonic compound Na Cl CrO MnSO4 Fe Br Cr PO4 cation Na anion CI X 3

Perform the following calculations and report your final answer with the correct number of significant figures and units 1 000 10 mL 1 L 261 25g 0 250 L X 2 054 g x X 1 mole C 12 01 g C 45 20 mL x 1 L 103 mL 1 045 g 1 mL X X 6 02 x 1023 atoms 1 mole C 0 110 mol HCl 1L 28g 2 054 x 12 01 C x 6 02 x 10 ade 45 20 ml X 10 ML X 0 110 mol HCL

Arrange these complexes in order of octahedral splitting energy A Largest A Smallest A

Read the passage and answer the following question Two students are conducting an experiment for a lesson on solubility and intermolecular forces They first weigh 50 g of table salt in a beaker Then they measure 250 mL of water in a graduated cylinder and add it to the beaker containing the 50 g of salt They notice that the salt dissolves in the water very easily Next they proceed to add another 50 g of salt After stirring for a while they notice not all the salt has dissolved 9 When NaCl is added to water the strength of intermolecular forces between water molecules and a substance s ions in solution affect the solubility in what way A The molecules dissociate into Na and Cl protons which are then surrounded by a shell of water molecules called a closed shell B The molecules dissociate into Na and Cl ions which are then surrounded by a shell of water molecules called a solvation shell C The molecules dissociate into Na and Cl photons which are then surrounded by a shell of water molecules called a valence shell D The molecules dissociate into Na and Cl neutrons which are then surrounded by a shell of water molecules called an electron shell

2 A gas collected when the pressure is 800 mm Hg has a volume of 380 mL What volume in milliliters will the gas occupy at standard pressure P P Gas Law Name V T V2 T1 na P V P V2 n T1 n2T2 mark out constants Show work

A 7 50 g sample of a hydrate is heated to drive off the water The resulting anhydrous salt is found to have a mass of 6 39 g Based on this information answer the following questions To get full credit you must show all your work and pay attention to significant figures and units A Determine the mass of water lost B Calculate the moles of water lost during heating

Bonus up to 1 pt Imagine two solutions with the same concentration and the same boiling point but one has ethanol as the solvent and the other has carbon tetrachloride as the solvent Determine that molal concentration m and boiling point T Solvent ethanol carbon tetrachloride Normal Boiling Pt 78 4 76 8 Kb C m 1 22 5 03

A small amount of acetonitrile CH CN is dissolved in a large amount of water Imagine separating this process into the four stages sketched below The sketches show only a portion of the substances so you can see the density and distribution of atoms and molecules in them CH CN H O Use these sketches to answer the questions in the table below The enthalpy of solution AH is negative when soln CH CN dissolves in water Use this information to list the stages in order of increasing enthalpy Would heat be absorbed or released if the system moved from Stage A to B What force would oppose or favor the system moving from Stage A to 8 Check all that apply D A B C O absorbed released O neither absorbed nor released none lonic bonding force covalent bonding force metal bonding force hydrogen bonding force dipole force Olon dipole force dispersion force 0 0 X solution

Of the two following reactions which will be the faster reaction Explain your reasoning 280 240 8200 160 120 80 40 Reaction Coordinate O Graph B O Graph A Question 2 OR PE kJ 250 200 150 100 50 Reaction pathway

mol 22 4 L 1 mol 6 02 x 1023 representative particles 1 mol g m 30 Know how to perform mole conversions using moles grams and representative particles What is a representative particle What is the name of the representative particle for the ionic compound The covalent compound An element a How many representative particles are in a 53 79 gram sample of SrCO b C How many moles of AlF3 are in a 10 0 gram sample of Alfs d How many grams of SO are in a 0 65 mole sample of SO e f How many moles of copper atoms in 75 g of Cu In a sample with 170 grams of water how many molecules of water are present

On a piece of scratch paper draw structural formulas for all of the constitutional isomers that would be named as a dibromopropane The number of compounds is

Give the name for the fol 16 Ba OH 2

20 2 What are 2 properties of acids