Chemistry Questions and Answers July 17, 2020

A sample of a gas mixture contains the following quantities of three gases. compound CO CO SF6 The sample has CO mass 1.54 g CO SF6 1.23 g volume 2.50 L temperature 16.6 C total 1.22 g What is the partial pressure for each gas, in mmHg What is the total pressure in the flask mmHg mmHg mmHg mmHg

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9) Convert 8.92 yards to furlongs, given the following facts 1 yard equals 0.9144 meters 1 furlong equals 201.2 meters (Same hint as in problem 8.) Additional metrictometric conversion problems (review from experiment 1) 10) Convert 33.5 cm into each of the following units. a) dm b) km c) mm d) m 11) Convert 0.07505 dL into each of the following

8. A rather portly male chemist tips the scales at 241 pounds. What is his mass in kg (1.00 lbs 454 g) (a) (b) (c) (d) 100.0 kg 109 kg 114 kg 123 kg 131 kg

Arrange the following solvents by polarity (least to mostpolar): water, acetone, isopropanol, ethanol, and toluene. (4points)

b. What is the definition of Eutectic point A mixture contains two different components as A and B. Component A, B, and mixture melt at 90, and 75, 55C, respectively. Draw the diagram and indicate the eutectic point and melting point of both compounds by using data.

Aluminum fluoride, AlF3, has a Ksp value of 1.1x10?3.Aluminum nitrate and calcium fluoride are added to water to get asolution with 0.15 M Al(NO3)3 and 0.15 M CaF2. Whatcan be said about this solution? The answer is: A precipitate forms because Q > K Please explain how to find the answer and why it is correct

Besides their shape, how does a 2s orbital differ from a 2p orbital O In a multielectron atom, the 2p orbital is higher in energy than the 2s orbital 2p orbitals are larger than 2s orbitals A 2s orbital has 2 radial nodes, a 2p orbital has 1 radial node A 2p orbital can accommodate 6 electrons, a 2s orbital accommodates 2 electrons

4. Balancing redox reactions in basic solution. You MAY need to add OH or OHHO to balance the equations. a. HS(g) MnO4 (aq) Sg(s) MnO(aq) b. CIO (aq) P4(s) PO4 (aq) Cl(aq)

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c) 74.1 cm to L,h) 2000 ml to Cm i) 5000 ng to m r

da, odt bud of water exactly the same If not, explain Did salt and sugar affect the boiling temperature any difference.ew sdi to sanansaga di bro0 (SIS)0001 of gnised sunitno

Barium ( Ba ) iselement 56 on the periodic table. Asamplecontains 2.9510 24 atomsof Ba . Calculate the amountof Ba . mol Ba

OBJECTIVE To determine stereoselectivity in the borohydride reduction of a symmetrical 1,2diketone as exemplified in the reaction below R R 1,2diketone INSTRUCTIONS Sodium borohydride (NaBH) Ethanol R OH R (R) RI H R.R1,2diol OH R (SS) R OH S.S1,2diol R OH (R) SR OR OH S.R1,2diol R.S1.2diol Mesodiol

Calculate the moles of NaOHdelivered by using the volume of NaOH and themolarity of NaOH. (The volume needs to be in liters and theconcentration of the NaOH is 1 M.) The moles of acetic acid insample is equal to the moles of NaOH deliveredbecause the acid has one H + and the base has oneOH - . So it is a 1 to 1 ratio. The mass of acetic acid

Name of Vinegar Sample Mass of Vinegar Calculated Volume of Vinegar Initial NaOH Volume in Syringe Final NaOH Volume in Syringe Volume of NaOH Delivered Moles of NaOH Delivered Moles of Acetic Acid in Sample Mass of Acetic Acid in Sample Calculated Molarity of Acetic Acid in Vinegar Calculated Percent Mass of Acetic Acid in Vinegar Average Percent

This is benzoic acid Ir spectra and Do what each peaks represents

Wavenumbers (cm1) 35 4000 3500 3000 2500 2000 1500 1000 600 40 45 1678 1453 1324 1209 60 932 55 1421 1101 1128 Transmittance 09 1601 1583 1186 65 1073 1027 1000 805 70 2827 2669 2555 75 2877 3071 250 80 2729 1496 85 2088 1991 1973 1916 1828 1794 06 95benzoic acid benzoic acid pure

The average human adult weigh 70. Kg. and said to bess020 water by mass (1) How many Kilograms of water are present in an average human adult 22 How many grams of water are present in and average adult How many moles of water are present in and average hunanadult How many moles of water are present in human 2 Use Scietific Notatio Avogadros

A) B) The pull down options are: NaHCO3, Na3C6H5O7, H3C6H5O7,H2O, CO2, there is no limiting reactant.

The fizz produced when an AlkaSeltzer tablet is dissolved in water is due to the reaction between sodium bicarbonate, NaHCO3, and citric acid, H3C6H507 3 NaHCO3(aq) HC6H5O7 (aq) 3 CO (g) 3 HO(l) Na3C6H507 (aq) In a certain experiment 0.031 moles of sodium bicarbonate and 0.041 moles of citric acid are allowed to react. Which chemical is the

Calculate the percent recovery of copper. Use the formula %recovery= ending mass of copper (g)/inital mass of copper x100% Mass of empty centrifuge tube- 2.639 g Mass of centrifuge + starting copper- 2.868 g MAss of centrifuge + dried copper- 3.125 g Would it be 2.12 or 212 %?

How to you calculate ph from pKa and vice versa?

Calculate lattice energy.

2. The lattice energy of an ionic compound is the energy change when one mole of ionic solid is separated into its gaseous ions. Given the data below, find lattice energy for AlBr3, which is the AH for the following reaction AlBr3(s) A1 (g) 3 Br(g) Chemical reaction Al (s) Al (g) Al (g) Al (g) e Al (g) Al(g) e AlA1 (g) e Br (g) 2 Br (g)

Test questions Points 1. Complete the following table about nucleic acids (12 points 1 point for the first six blanks and 2 points for the last three blanks) Component Bases Sugar Nucleoside Nucleotide Nucleic Acid DNA Base deoxyribose RNA Ribose Base ribose phosphate Polymer of ribose nucleotides

Calculate the DDT concentration in the spinach sample. Expressthe final answer as milligrams DDT per gram of spinach.

A researcher was attemping to quantify the amount of DDT (dichlorodiphenyltrichloroethane) in spinach with gas chromotography using a chloroform internal standard. To begin, the researcher examined a sample containing 7.16 mgL DDT standard and 1.70 mgL chloroform as the internal standard, producing peak areas of 4075 and 10369, respectively. Then,

Choose the correct definition for an intrinsic semiconductorwith an example. 1. a conductive material of an element with the addition ofdopant (0.0001% Si in Al ) 2. a conductive material of an element with the addition of dopant(0.0001% Al in Si ) 3. a material that naturally can have electrons move across theband gap ( Al ) 4. a material that

Here is the chemical structure of 2butanone H H 0 H H H H H Decide whether each molecule in the table below is another molecule of 2butanone, a molecule of an isomer of 2butanone, or a molecule of an entirely different compound. H H H molecule H 0 H H H CCC HOH H 141 CH H H H CH HOH H 451 H H H H relationship to 2butanone (Choose one) another

Calculate the concentration in moles per liter (M) of a solution that contains 0.64 mol AuCl, and has a volume of 0.51 L. concentration Calculate the concentration in moles per liter (M) of a solution that contains 1.00 mol NiCl, and has a volume of 0.25 L. concentration M concentration M Calculate the concentration in moles per liter (M) of a

COMPARING LEWIS STRUCTURES TO2S01 H F 0 H08 0 H A B BF4 (HO) 3B NO Identify all instances in which the Lewis structure is correct. A B None of the Above 0N0 H N8 I H D NHOH CALCULATOR,COMPARING LEWIS STRUCTURES TO2S01 H F 0 H08 0 H A B BF4 (HO) 3B NO Identify all instances in which the Lewis structure is correct. A B None of the Above 0N0 H

Like metallic crystals, ceramic crystals can have defects. We want to identify the type of defects and consider how they affect the overall crystal. Consider the schematic (on the right) of a NaCl crystal after the formation of an Na vacancy to analyze for lonic type defects CH Na CI Na CI Nat CH CI 7. What is the charge on the crystal before the

The chemical formula for hydrogen bromide is HBr. A chemist measured the amount of hydrogen bromide produced during an experiment. She finds that 1.2 g of hydrogen bromide is produced. Calculate the number of moles of hydrogen bromide produced. Round your answer to 2 significant digits. mol X do

A book has a mass of 1.75 kg. What is this mass in grams Mass Submit Answer Visited g Try Another Version 10 item attempts remaining

CdF2 (s) Cd (aq) 2 F (aq) 1. A saturated solution of CdF2 is prepared. The equilibrium in the solution is represented above. In the solution Cd eq 0.0585 M and F eq 0.117 M. a. Determine the solubility of CdF2. b. Some 0.90 M NaF is added to the saturated solution. Does the solubility of CdF2 increase, decrease, or remain the same Justify your

The azide ion, Nsubscript3 superscript1-, is a symmetrical ion, all of whose contributing structures have formal charges. Draw three important contributing structures for this ion.

Carbonates react with acids to form a salt, water and carbondioxide gas. When 69.4 g of calcium carbonate are reacted withsufficient hydrochloric acid, how many grams of calcium chloridewill be produced?

What is the charge on iron (Fe) in each of the following compounds For compounds with oxygen, remember what the charge on oxygen must be in an ionic compound. Fe3P 3 2 1 2 3 FeO 3 2 1 0 1 2 3 ...loading image... FeO3 3 2 1 1 2 3

The chemical formula of the ionic compound formed by strontium and phosphorus is Sr3P2. Draw the Lewis structure for Sr3P2. In the Lewis structure Sr3P2, Sr has dots and P has dots (Enter the number of dots for these 2 blanks). In the Lewis structure, the coefficient of Sr is the coefficient of P is the charge on Sr is and the charge on P is

Be sure to answer all parts. The average atomic mass of nitrogen is 14.0067. The atomic masses of the two stable isotopes of nitrogen, 14N and 15N, are 14.003074002 and 15.00010897 amu, respectively. Use this information to determine the percent abundance of 14 N. Determine the percent abundance of 5 N. 1 out of 3 atter Report both answers to

The charge on the copper ion in the salt CuO is, O O O 2 O 1 1 02 3

need the compound from this spectra. thank you

4000 C 79.23 H 5.70 1.0 12.5 12.0 11.5 110 10.5 10.0 9.5 9.0 (O 0.98 MW212.248 myym 1500 7.5 7.0 65 60 5.5 5.0 4.5 40 35 30 25 20 (ppm) 15 10 05 00 45,210 8 178.3 137.9 128.7 1275 77.3 CDCI 77.0 CDC3 76.7 CDC) 56.9

Calculate the molar mass of Al2(SO4)3 5H20. O 315.3 gmol 432.3 gmol O 342.2 gmol O 360.2 gmol O 369.3 gmol

621. Mercury(I) is a diatomic ion (Hg2, also called mercu rous ion) with a charge of 2. Mercury(I) iodate dissociates as follows Hg2 (103)2(s) Hg2 2103 Ksp Hg2 103 FM 750.99 (a) Find the concentrations of Hg2 and IO3 in a saturated solution of Hg2(IO3)2(s) if there are no other significant species such as the ion pair Hg. 103. (b) Find Hg2 in a

Complete the Lewis structures for pyridine (C5H5N) showing the two most common resonance forms. Draw the Lewis structures with the formal charges minimized. () 40 10 05 120 H a Br 1

A concrete pizza ovenis warmed by the combustion of liquid pentane (assume SATP isappropriate). The oven is 1.570 kg, and is initially at 25.0 C. If7.9 g of pentane is burned, how hot will the oven get?

Chlorofluorcarbons (CFCs) are anthropogenic pollutants that persist in the stratosphere where they have been implicated in the depletion of the ozone layer. The chemical structure of CFC113 is shown below. Give the chemical formula and the total number of valence electrons in the molecule. CFC113 Chemical formula Valence electrons Number

Choose the one correct or one incorrect statement regarding chromatography gravity can be used as a delivery system the mobile phase can be a gas the chromatographic bed can be a resin the chromatographic bed can be a glass sheet the stationary phase can be a liquid,Choose the one correct or one incorrect statement regarding the technique of ion

Cadmium sulfide is a synthetic pigment that is renowned for itsbright yellow appearance and was used heavilyby many artists such as van Gogh, Matisse, and Munch. Itcrystallizes in a cubicclosed-packed array of sulfideions,where cadmium occupies one-half of the tetrahedralholes. What is the molecular formula of cadmium sulfide? a) CdS b) Cd2S c)

Consider the structures below. Which are reducing sugars HO HOH CH H H CH, H OH H BDGlucose (chair representation) H OH H H Select one OH H OH H 0040 00 OH aDGlucose1phosphate 0P0 HOCH2O H H CH H OH H OH OH BDFructose HO GDGlucopyranony a. Only Dglucose. b. Only maltose. c. Only glucose1phosphate. d. Glucose1phosphate and sucrose. e. Dglucose,

Consider molecules with the molecular formula C4H8 0. (Select all that apply.) a. Choose the structural formula for a molecule with this molecular formula that contains a carboxyl group. CH3CHCOH CH3 O CHCHCH3 OCHOCHCHCH CH3CHCOCH 3 CH3CHOCCH3 OCHCHCHCOH ,b. Choose the structural formula for a molecule with this molecular formula that contains

Consider this problem A medication is needed for a person who weighs 129 pounds. The medicine has a recommended dosage of 35 micrograms for every kilogram of body weight. How much medicine should this person take What are all the conversions that are given in this problem Choose all that apply. 35 micrograms medicine 1 kg body weight 1 lb 453.6

CONSIDER THIS 1. Suppose that you did not put salad dressing equivalent to one tablespoon of vegetable oil on your salad at dinner. How many fewer nutritional calories would you have eaten as fat Assume that 1 tablespoon of oil has a volume of 15 mL, a density of 0.92 gmL, and supplies 8.8 kcalg of oil when consumed. (Also recall that 1

STARTING AMOUNT X 100 ADD FACTOR x( ) 7.6 x 106 1000 (0.1) 1 Convert 7.6 m 0.01 7.6 x 104 cm cm to m (1000) 7.6 ANSWER cm (100) (1) m RESET 3 0.1 076 (0.01),STARTING AMOUNT X A puzzle cube has a volume of 187 1 ADD FACTOR x( ) 1210 187 (12) in (100) 29.0 cm mL 3060 100 in What is the volume of the cube in in ANSWER 2.54 (0.01) mL 12 475 cm RESET

Conversion Worksheet (121) Tab Name Calculate the following conversions with the correct amount of significant figures. 1) 1.6 m into mm 2) 36 g into kg 3) 470, mm into m 5) 86 cm into km 7) 30 feet per hour into inches per hour 4) 1.43 kg into g 6) 9.3 x 105 Mg into ug 8) 18 msec into mhr

Cobalt(II) phosphate has the formula and solubility O Co3P2 and insoluble O COPO4 and soluble O Co(PO4)3 and soluble O Co3(PO4)2 and soluble O Co3(PO4)2 and insoluble

Consider the reaction and initial rate data shown below Experiment NO (M) CO (M) Initial Rate (M) 1 0.091 0.273 0.0909 0.182 0.273 0.3636 0.182 0.545 0.3636 2 NO2(g) CO(g) NO(g) CO2(g) 3 Select the answer that best applies to this reaction kinetics O (a) k 1.0000 O (b) InCOt kt InCO O (c) k 11.0000 MS (d) rate kNO CO (e) rate does not

What conformational relationship between the Cl and F atoms in1-chloro-2-fluoroethane will result in the greatest moleculardipole moment? gauche eclipsed skew

Compare the molecular shape around each carbon atom and H-C-Cbond angles in C 2 H 6 , C 2 H 4 , and C 2 H 2 . Howis bonding around each carbon atom in these compoundsclassified? C 2 H 6 trigonal planar bent linear tetrahedral C 2 H 4 bent trigonal planar linear tetrahedral C 2 H 2 trigonal planar linear bent tetrahedral

Select all INCORRECT answers regarding the pharmacokinetics of an orally administered drug which is primarily cleared by glomerular filtration in the neonatal period. Clearance would be increased during the neonatal period due to increased glomerular filtration Clearance would be decreased during the neonatal period due to decreased glomerular

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Convert the following. 1. 5.2 quarts to liters 2. 1.36 feet to meters 3. 760 millimeters to inches 4. 680 nm to cm and m 5. 6.25 F to C 6. 36.6 C to F 7. 98.6 F to C and K 8. Convert the following weights into g and then into kg a. 29 oz can of peaches b. 4 tons of lead emitted daily by cars in Los Angeles c. 10 lb. bag of granulated sugar 9. A VW

Consider the compounds 1propanol, CH3CHCHOH, and butane, CH3CHCHCH3. The molar masses and boiling points are given in the table below. Formula Molar Mass (gmol) Boiling Point (C) 60.10 CH3CHCHOH CH3CHCHCH3 58.12 Which compound has stronger intermolecular forces O CH3CH2CH2OH CH3CHCHCH3 97.0 0.0 Which is the controlling factor in the difference in

Complete and balance these halfequations a) SO32 S2032 (acidic solution) b) HNO3 c) Al (s) N0 (g) (acidic solution) Al(OH)4 (basic solution)

1) Graded Question Consider a solution that is made from mixing 0.053 moles of A and 0.087 moles of 8 in 125.0mL of water, if the AB solid formed has Kip 8.98x10, what is the concentration of cations and anions at equilibrium in molarity) using the xissmall approximation Molarity of cations in solution at equilibrium w xissmall Molarity of anions

convert 22.5 cm to inches

Determine the number of moles of oxygen gas lost. Weight ofunknown equals 1.203 grams and weight of oxygen released equals0.391 grams. The molecular weight of oxygen gas is 32.0 g/mol.Using stoichiometry, use the number of moles of O2 gas released todetermine the number of moles of KClO3 decomposed. Determine thenumber of grams of KClO3

Compare the structure of CO and SO. Which of them has a greater dipole moment and why SO has a greater dipole because the bond dipoles do not cancel in that molecule. CO has a greater dipole because the electronegativity difference between carbon and oxygen is greater than that between sulfur and oxygen. Neither molecule has a dipole moment. CO

Writing Empirical Formulas and Naming Ionic Compounds, Acids, and Hydrates Using the crisscross method, write valid empirical formulas for the compounds that would be formed by combining the given atoms and polyatomic ions. Then name the compound. If a chemical formula is provided, name that chemical compound. For example, sodium with chlorine Na

Consider the titration of KHP with NaOH. Write the reaction that governs this neutrilization. What is the stoichiometry between the acid and the base? If .4728g KHP require 22.86mL of NaOH to reach the phenolphthalein pink end point, what is the molarity of the NaOH? Molar Mass of KHP is 204.22 g/mol. show your work -what is assumed to be equal at

Example two You are given a 700.0 ml sample of water that has been contaminated with acid. The pH2.4 The water is not drinkable because of the acidity. You are assigned to cancel out the acidity. You have available 800.0 ml of base solution, which has a 0.007M Calculate the exact volume of base you will need to make the acidified water neutral.

If the density of steel is 5.80 gcm3, the mass of 0.100 cm3 of this material is 58.0 g 1.72 g 5.80 g 0.580 g

Constants Boltzmann constant k 1.381023 JK OR 8.61105 eVK Electron charge e 1.6109 C Free electron mass m 9.110 kg Planks constant h 6.6x1034 J.s Reduced Plancks constant h h(27) 1.0545x1034 J.s Proton mass M 1.67x1027 kg Speed of light c 3108 ms 1J 6.241509x108 ev Question 1 30 points (CO3) Suppose a new semiconductor material (called X)

The cyanate lon (OCN) has the following atom arrangement 21110 Part 1 out of 3 (a) Identify the possible resonance structures for CNO. Select all that apply. 0 CENTO .. 0C .. 0CEN 7 attempts left NC OCIN Check my work .. CNEO .. 10 0 C CN0 Ne

Determine the molecular geometry of CH2CHCH3 usingVSEPR theory. Check all that apply. linear trigonal planar bent tetrahedral trigonal pyramidal seesaw T-shaped

Dinitrogen pentoxide (N2O5) decomposes as follows to nitrogendioxide and nitrogen trioxide:$$N2?O5?( g ) NO2?( g )+NO3?( g )Calculate the average rate of the reaction between consecutivemeasurement times in the following table. Time (s) [N2O5] (molecules/cm3) 0.00 1.205?1012 1.15 1.150?1012 2.30 1.113?1012 3.45 1.088?1012 4.60 1.073?1012 Express

Convert the following: Equine (horse) a.) 11.5 lbs = _______ kg or ________ g b.) 9.2 lbs of 15% CP =_________ lbs CP or _________ g CP c.) 3.5 kg of 0.20% Ca = _______ g Ca d.) 425 kg of horse = _________ lbs e.) 1250 lbs of horse = _________ kg f.) 15 kg of feed having 10.2 mg copper /kg = _________ mg Cutotal intake g.) 15 kg of feed having 22

Dissolve 0.5 g Iodine (MW = 254 g/mol) in about 380 mL water. Add 50 mL of 1 M potassium iodide and 25 mL 1 M calcium chloride. Make up to the total volume of 500 mL with water. Which of the final concentrations are correct? a) 0.1% (w/v) iodine, 100 mM KI and 100 mM CaCl2 b) 0.2% (w/v) iodine, 200 mM KI and 100 mM CaCl2 c) 0.1% (w/v) iodine, 100

Draw the structure for A) 4-isopropyl-2-methylheptane B)6-ethyl-2,6,7-trimethyl-5-propylnonane .

Define electronegativity. A) the ability of an atom to repel neutrons in a chemical bond B) the ability of an atom to repel electrons in a chemical bond C) the ability of an atom to attract protons to itself in a chemical bond D) the ability of an atom to attract neutrons to itself in a chemical bond E) the ability of an atom to attract electrons

Dilution of the Maalox (milk of magnesia with magnesium hydroxide) Solution 1. Record the brand and %m/v Mg(OH) 2 in your Maalox antacid or generic form. Note that some brands contain Al(OH) 3 . 2. Dilute your antacid 1:3 (1 part antacid + 3 parts water) for a total volume to be used in 4-5 titrations (the final volume is for you to determine but

Table 2 Report Table for (insert your own description here) Brand Mg(OH)2exp date 1 2 3 Brand Mg(OH)2exp date Average Std. Dev. Run Table 3 Report Table for (insert your own description here) Experimental mv Molarity Diluted Mg(OH)2 Label or Original mv (our accepted) Molarity undiluted Mg(OH)2 Error mv undiluted Mg(OH)2 High Low

Dilutions 1) In a 1 to 10 dilution, how many parts of diluent are needed 2) In a 1 to 3 dilution, how many parts of diluent are needed 3) In a 1 to 5 dilution, what is the ratio of solute to solvent 4) If 10mL of sample are added to 190 mL of diluent, what is the dilution factor 5) In a 1 to 2 dilution, what is the dilution factor 6) In a 1 to 16

Draw all of the isomers for the mono, di, tri, tetra, penta, and hexa substituted methyl benzenes (ie Toluene) Then determine how many signals each compound would display in the carbon13 and proton1 spectra Structure C peaks H peaks Structure C peaks H peaks 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

Density of copper is 8.96 gcm and density of zinc is 7.14 gcm. Brass is an alloy made of copper and zinc. You are given a sample of brass with the density of 8.32 gcm. The price of zinc is 1.80kg and price of copper is 6.13kg. Determine the material cost for making one ton of the brass sample that you have.

Convert 1 l (1 microliter) into ml (milliliters): express as afraction or decimal: ANSWER HERE express asa number using exponential notation: ANSWERHERE How many micrograms (g) does 1 l of water weigh? ANSWERHERE How many ml are there in 5.5 liters? express as a wholenumber: ANSWER HERE, express in scientificnotation: ANSWER HERE How many liters

Question 52 What is the name of this compound CaCO3 O Calcium carbonate O calcium carbon oxide O carbate O carbonic acid

Determine the pH of each of the following solutions., 3.610?2 MHI,9.2310?2 M HClO4, a solution that is 4.010?2 M in HClO4 and4.810?2 M in HCl, a solution that is 1.01% HCl by mass (Assume adensity of 1.01 g/mL for the solution.) please show work

Enter your answer in the provided box. The atomic masses of the two stable isotopes of copper, Cu (69.17 percent) and 29 65 Cu (30.83 percent), are 62.929599 and 64.927793 amu, respectively. Calculate the average atomic 29 mass of copper. amu

1 After an object with mass 32.118 g is placed in a graduated cylinder containing water, the water level rises to 47.13 mL. The density of this object is 10.8 gcm. Determine the initial level of the water in the graduated cylinder SETUP Answer

The electron configuration for the Co3+ ion is [Ar]3d6. In the [Co(NH3)6]3+ complex ion, what is the total number of electrons that are placed in molecular orbitals to determine the molecular orbital configuration? a.6b.12c.15.d.18e.21 16.Below is the electronic absorption spectrum for an aqueous solution of [Co(NH3)6]Cl3. Recall that the

An electrolysis experiment was run for 19 minutes and 45 seconds at an average current of 182 milliamps (mA). The mass lost by the copper anode was 0.0745 grams. (b) Calculate the number of coulombs transferred. (Remember coulomb amps x sec) (C) (d) Calculate the moles of copper lost from the anode. Based on the moles of copper lost determined in

What dosage in grams per kilogram of body weight does a 133 lbwoman receive if she takes two 275 mg tablets of penicillin? Howmany 125 mg tablets should a 50 lb child take to receive the samedosage? Express your answer using two significantfigures.

Cream cheese frosting is so simple to make: cup butter + 8 ounces cream cheese + 4 cups powderedsugar + 2 tsps vanilla 3 cupsfrosting a. Suppose you have 175 g of butterand 325 g of powdered sugar. Which ingredient doyou have the least of (in terms of mass)? b. Since the recipe callsfor cups , not grams , youll need toconvert your butter and

Example 1. 3.778 feet to centimeters Solution Map Work 2. 1.57 yards to decimeters Solution Map Work 145 centimeters to feet Solution Map cm in ft 1 Work 145 cm () ( in) (1)4.76 f 2.54 3. 16.4 pints to milliliters Solution Map 4. Work 1.9 x 10 miles to micrometers Solution Map Work,Chemistry 120 5. 9.887 x 10 nanoseconds to years Solution Map

Shepler r Kaija Buster Name Team PreLab Study Que What is the equation for converting a Fahrenheit temperature to a C What is meant by the term specific heat 3. Why is a measured amount of water needed to dete

Equation Write the formula for each of the following chemical compounds exp andor suffixes. 1. Carbon monoxide 2. Manganese (IV) acetate 3. Phosphorous acid Edit Format Table 12pt Paragraph BIUA 2 T

4. Caprolactam is the monomer used in the synthesis of Nylon6, one of the major nylon polymers. Show below is the hydrolysis of ecaprolactam under basic conditions. Provide a stepbystep mechanism for this reaction showing each intermediate and using arrows to indicate electron flow. NH Caprolactam NaOH HO NaO NH

Essay (30 points) Answer the question as indicated to earn all available points. 49. A Chemistry student was given the following mixture nickel filings, small Styrofoam pellets, sugar, sand, and 0.5 cm diameter glass beads. Heshe has access to the following materials and equipment beakers, magnets, sieves with 3mm holes, hot plates, watch glasses,

Draw an alternative Lewis structure for CH2Br. I can't seem toget this right :(

Determine the formal charge on the bromine atom in the following structure. If the atom is formally neutral, indicate a charge of zero. H H Formal charge on Br 19 (b) Draw an alternative Lewis structure for the compound given in part (a). Show the unshared pairs and nonzero formal charges in your structure. Dont use radicals. H H C

Explain what specific error in calculating your Ksp value would occur ( Ksp being too high or too low), compared to the situation in which no errors occur. Remember that the student doesn't know these errors occurred. When you answer the questions, consider how the situation affects the calculation of Ksp. 1) the buret was not conditioned ( it

Draw the structure of (1,1dimethylethyl)cyclopentane.

Exercise 10.35 Determine the electron geometry, molecular geometry, and idealized bond angles for each of the following molecules. In which cases do you expect deviations from the idealized bond angle 1. PF3 2. SBT 3. CHBr 4. BCls,ago ago go ago agd go 1 ago 1 ago Part B Determine the molecular geometry for each molecule. Drag the items into the

Draw the Lewis DotDash Structure of the molecules and ions below. Indicate the AXE notation, a Lewis structure (or one of the possibilities), and the electron and molecular geometry of the central atom. If there are multiple central atoms, answer the same questions for each one of them, and all molecules may not have a centeral atom. AXE Notation

the empirically determined atomic radius of Cs in the metal with a bcc structure is 272 pm, calculate the expected atomic radius of the Cs atom with a coordination number of 12

Which of these facts about periods in the periodic table is false A period is a horizontal row in the periodic table. Moving from left to right, each element in a period has one more proton than the element before it. There are seven periods in the periodic table. Elements in the same period have the same atomic number.

Extra Problem 1 A human hair is approximately 0.001 inches thick. Express this dimension in centimeters nanometers (nm) microns (um) Angstroms ().

Which element has the lowest electron affinity (lowest energy release to gain an electron) O Sr Se Al