General Questions and Answers

12 50 Which compound in each pair would be more soluble in water Explain 12 2 a ethane or ethanol b 2 propanol or 2 pentanol C methyl propyl ether or 1 butanol

3 If you had 3 50 mol of fructose how many molecules would you have

Home About Us Rooms Reservations Local Weather Directions About Us Rooms Reservations We re happy to take reservations up to a year in advance by phone fax or email Reservations Feel free to contact us with any queries about Lakeland Reeds or about planning your trip ferring to the figure above a linked text entry is Read about reserving Lakeland Reeds for a wedding or other special event PDF 45 Marsh Grass Ln Marble MN 55764 218 555 5253

Copper II fluoride contains 37 42 F by mass Use this percentage to calculate the mass of fluorine contained in 56 0 g of copper II fluoride Express your answer in grams to three significant figures

2 9 mol C6H12 Express your answer in moles to two significant figures nH Submit Part D A O Request Answer VA 2 02 mol C8H 18 Express your answer in moles to three significant figures mol

Which orbital is consistent with this description OA 5f OB 5p OC 4f OD 5d are depicted

Part A Classify each compound as organic or inorganic Drag the appropriate items to their respective bins C6 H14 ZnS NaClO C H6

13 64 Identify each of the following pairs of Fischer projections as enantiomers or identical compounds 13 2 13 3 a b H C CH OH CI CH CH CH OH H OH and 13 7 164 Full Alternative Text CH CH OH CI H OH and HO CH CH CH OH 10 H CH 13 7 165 Full Alternative Text CH OH CH OH H C and H H a CH CH

17 1 g C8H10 Express your answer in molecules to three significant figure

Question 34 2 5 points Listen BeBr2 what is the formal charge on the Be atom N

b Calculate the formula mass molar mass for the empirical formula C H 6

When Cindi says Time for Plan B it means that she plans to O try to look like a boy O try to get a different number kick the ball over the goalle s head ask her friends to try out for the team

Solve for x where M is molar and s is seconds 2 7 x 10 M 2s 0 24 M Enter the answer Include units Use the exponent key above the answer box to indicate any exponent on yo units View Available Hint s 19 37 3248 Units x

2 11 a 10 P P QT QT N N N J QT b c Ne a b C Ne a b c d Which of the properties above are physical ones Which properties refer to liquids only Name an atom that belongs to the same group or family as b c Nome an atom that belongs to the same period as a tarnishing of silver a precipitate forms a hockey stick is broken b C Which property is being described shiny or dull can be easily poured can be made into sheets Rb Ra Au Name an atom that has similar properties to these b c Classify these as either a chemical C or physical property P regarding hydrochloric acid it is a transparent liquid it has a sharp acrid odour it will react with Mg to produces H2 gas Classify these statements as qualitative QL or quantitative QT it s density is 1 35 g mL QL QT QL QT a brown precipitate was formed the temperature is 30 degrees QL QT d c C C can be drawn into a wire solids mostly Hg an exception poor conductors of heat reacts with acids to release H gas MMMM P P ZZZZ N can be made into wires will burn in air feels smooth to the touch Ra Sn N N Mg Indicate if the following properties are the properties of metals M or nonmetals N N d e coke going flat sifting flour d e f d f g h Si H Li it is not viscous it s density is 1 35 g mL the reaction was very fast the block was 2 4 g in mass Lebron James is tall gains electrons to form an some are unreactive loses e to form cations malleable

composition c 40 91 H 4 58 o 54 51 The molar mass of vitamin C is 176 12 g mol Part A Find the molecular formula of vitamin C Express your answer as a chemical formula A O www

5 A 17 0 g sample of potassium is placed into a reaction chamber containing 5 25 L of chlorine gas at a pressure of 93 7 kPA and a temperature of 20 0 C a Write the balanced chemical reaction for this reaction including states 2 marks b Determine the limiting reactant and the reactant that is in excess and calculate the mass of solid potassium chloride that can theoretically be produced 7 marks

click on the Review link to access the section in your eText Part A Copper II fluoride contains 37 42 F by mass Use this percentage to calculate the mass of fluorine contained in 52 5 g of copper II fluoride Express your answer in grams to three significant figures V

Which of the following explains why gases are easily compressed The particles in gases are typically very small There is a large amount of space between particles The intermolecular forces between particles are very weak The particles have a high level of kinetic energy If the Kelvin temperature of a given amount of gas is reduced by half at constant volume the new pressure will be O none of the above twice the orginal pressure three times the original pressure half the orginal pressure unchanged 1 pc 1 poin

A student makes a solution for analysis by mixing 6 42 grams of Cu SO4 into 350 3 grams of water The density of water at the temperature of the lab at the time the solution was made is 0 9926 g mL Calculate the molarity molality mole fraction and mass percent of the copper I sulfate The molarity of the solution is 0 0793 The molality of the solution is 0 0799 The mole fraction of the solution is 0 999 The mass percent of the solution is 1 80 X X X q Provide answers in decimal notation and three significant figures

A solution is prepared by mixing 27 0 mL of 1 propanol C3HgO d 0 803 g mL with 132 60 mL of water d 0 998 g mL Calculate the molarity of the 1 propanol assume the volumes add on mixing Report your answer with 3 decimal places Your Answer E

A radioactive isotope decays over time at a rate proportional to the amount of the material at a given time A t is the amount of material At t 0 there is 100 kg and time t 4 there is 60 kg Write the particular solution to the differential equation which will describe the amount of isotope after time t A

2 A fire extinguisher contains carbon dioxide gas at a pressure of 1 50x10 kPa in a 8 05 L tank and is located in a room where the temperature is 21 5 C Calculate the number of carbon dioxide molecules in the tank 4 marks

D The Chemical Properties of the Halides 1 The Reactions of the Halides with Various Metal Ions Describe the appearance of each mixture in tubes 1 12 Ca NO3 aq Test tube no NaF aq Test tube no NaCl aq Test tube no NaBr aq Test tube no Nal aq Caff 7 10 158 Periodic Table and Periodic Law AgNO3 aq 2 Agro 5 8 11 Fe NO3 3 aq 3 fef 6 9 12

A piston in a sealed syringe is pressed inward How would this affect the volume and pressure of the air inside Volume increases while pressure decreases Volume decreases while pressure remains constant Volume decreases while pressure increases Volume stays constant while pressure increases Both volume and pressure decrease 1 po

Watch TWE 4 15 Read Section 4 11 You can click on the Review link to access the section in your eText A 0 72 mg sample of phosphorus reacts with bromine to form 10 01 mg of the bromide Part A What is the empirical formula of phosphorus bromide Express your answer as a chemical formula View Available Hint s

The vapor pressure of a solution containing 8 24 g of a nonvolatile nonelectrolyte solute C21H420 in 71 18 g of solvent A MW 78 g mol is 684 torr at 20 C What is the vapor pressure of pure solvent A 20 C Report your answer to the nearest whole number Your Answer torr

the section in your e lext The empirical formula and molar mass of several compounds are listed Find the molecular formula of each compound Part A C6H7N 186 28 g mol Express your answer as a chemical formula 0 Submit A chemical reaction does not occur for this question Part B A O Submit Request Answer C HC1 120 96 g mol Express your answer as a chemical formula Part C A O A chemical reaction does not occur for this question Request Answer C5H10NS2 593 10 g mol Express your answer as a chemical formula

16 How much mass does 59 4 L of chlorine gas have

20 Determine the mass of carbon dioxide gas if the volume of the gas is 96 7 L

CH3CI g Cl g CH Cl g HCl g CH3CI M Cl M 0 80 0 70 1 60 0 70 1 60 1 40 2 06 Initial Rate M min 16 7 33 4 134 Use the data above to calculate the initial rate for the 4th experiment Enter your answer as an integer

When a billiard ball moves across a table it experiences O a change in kinetic energy O a change in potential energy O no change In kinetic energy O a change in either kinetic energy or potential energy

Which compound is most likely to exhibit covalent bonding o cao Fe 53 CsBr Cu OH 2 OC1 0

Which of the following compounds are polar and which are nonpolar a GeH4 b PH3 c CHCl3 d NO

I 4 The equation below represents the process of photosynthesis 6CO2 g 6H O 1 C6H12O6 s 602 g Suppose a plant produces 317 g of sugar What volume of carbon dioxide gas at 23 C ar 102 kPa is required 6 marks

18 44 8 L of nitrogen gas is 19 44 8 L of nitrogen gas is grams of nitrogen molecules of nitrogen

Choose the bond below that is the strongest OC CI OC Br OC H OC I OC F

A 1 225 g sample of potassium hydrogen carbonate is decomposed by heating to produce 0 855 g potassium carbonate Calculate the theoretical yield and percent yield of K CO3 2 KHCO3 s K CO3 s H O g CO g 2 A 1 775 g sample mixture of potassium hydrogen carbonate is decomposed by heating If the mass loss is 0 275 g what is the percentage of KHCO3 in the unknown mixture

Some chemical reactants are listed in the table below Complete the table by filling in the oxidation state of the highlighted atom oxidation state of highlighted atom 0 species H O aq FeSO4 s CI aq Cl 9

How many oxygen atoms are there in 22 0 g of carbon dioxide OA 5 09 x1023 OB 1 20 x1024 OC 1 42x1024 OD 6 02 1023

Be sure to answer all parts Consider the following types of electromagnetic radiation 1 ultraviolet 2 x ray 3 radio wave 4 visible 5 infrared 6 microwave Arrange them in the indicated orders from lowest to highest by entering numbers in order in the boxes below a Arrange them in order of increasing wavelength 412553 b Arrange them in order of increasing frequency 355 4 c Arrange them in order of increasing energy

At constant temperature and pressure if 0 4 mole of a gas A occupies 220 mL and x mole of B gas occupies 120 mL what is the number of moles of gas in the container that holds them B O 0 29 mol 0 22 mol O22 8 mol 22 mol

The total number of molecular orbitals formed doesn t always equal the number of atomic orbitals in the set True False

A brass alloy contains 70 1 copper Cu by mass moles of zinc in 45 5 g of the brass alloy moles of Zn 0 20 Incorrect Determine the number of atoms of zinc in 45 5 g of the brass alloy atoms of Zn 1 20 1023

Arrange the following compounds in terms of increasing polarity CN NaCl Br

Which of the following is a chemical property of iron A Iron melts at 1808 K B Iron is soft when pure C Density 7 874 g cm D Iron corrodes in moist air

Write a 150 words for your initial response Your first response is due by midnight of the second day of the unit Provide links to the resources you used to conduct your research You must respond to at least two other classmates on a separate day by midnight of the last day of the unit for full credit While you can be supportive of your peers by saying I agree or Wow I never thought of that these statements alone are not sufficient you must explain why Any posts made after the last day of the unit will not be considered for a grade Answer the question s below During preparation for an MODL amalgam on tooth 4 the dentist notices that the decay extends well beyond his initial assessment and is very close to the pulpal chamber He informs the patient that the treatment plan must be altered to see how the tooth will react now that the decay has been removed What changes will need to be made in the setup

Sort the numbers based on the number of significant figures they have Drag each tile to the correct location One Significant Figure Two Significant Figures Three Significant Four Significant Figures Figures

Describe a pi bond O p orbital overlapping with an f orbital side by side overlap of p orbitals overlap of two d orbitals O s orbital overlapping with the end of a d orbital O end to end overlap of p orbitals

List the number of sigma bonds and pi bonds in a triple bond 1 sigma 2 pi 3 sigma 0 pi 0 sigma 2 pi O2 sigma 1 pi

Question 9 How can the general context be an aid in making inferences OIt can confuse the reader OIt can provide enough information to understand what an idea is about O It does not provide accurate information to understand a text O It provides all the necessary examples needed to understand a text