Chemistry Questions and Answers July 12, 2020

Symbol Name 17C 13C 22Ne 345 Ca Kr 94Zr carbon12 carbon13 neon22 neon21 sulfur34 chlorine37 krypton82 zirconium94 Zn 672n 56Fe 55Mn 42Ca2 1271 lodine127 zinc67 manganese55 Isotopes worksheet. Insert missing numbers into table. Atomic Mass of protons 6 6 6 10 10 20 17 40 30 25 232 12 13 34 44 82 6 10 16 20 30 20 53 of neutrons 6 12 11 20 46 54

PreLab Study Questions 1. Why does a sodium street lamp give off a yellow color, whereas a neon light gives off a red color 2. Describe the energy levels of electrons in an atom. 3. Why do some elements produce colorful flames 4. How can you identify an unknown element using a flame test 5. Write the electron configuration for each of the

Predict the bond angles: the H-C-N bond angle in (CH3)2NH,,, answer is 109.5. i thought it would be 107.3 beacuse the in C-N-H bond in (CH3)2NH is 107.3

Intermolecular force between a N2 molecule and a O2 moleculeis: a.ion-dipole force b.hydrogen bond c.dipole-dipole force d.dispersion (London) force e.ionic bond

he 5. Instant cold packs use an endothermic reaction. These types of ice packs are stored at room temperature rather than needing to be physically cooled before use. When one breaks a tube inside the pack, two chemicals mix or react and absorb enough energy to produce a cooling effect. Common types include solid ammonium nitrate (NH.CI) dissolving

1 2 3 4 5 6 7 9 CH Practice Problems on Alkane Nomenclature CH CH, CH CH CH CH CH CH, CH CH,10) 4ethyloctane 11) 2methylnonane Draw structural formulas for each of the following. 12) 3,3dimethylpentane 13) 3ethylpentane 14) 3ethyl2methylheptane 15) 3ethyl4(1methylpropyl)2,2dimethyloctane,b) CH CH CH CH CH 1. Name the following molecules CH

I have been having some trouble analyzing this IR spectra and labeling all the peaks such as C-H stretch etc. not sure if this is allowed but here are 2 links, one of my IR spectra and the other of characteristic IR absorptions. Im assuming the peak just below 3000 cm-1 is a C-H stretch, the peak at about 1600 C=C, the next largest peak being C-H

POSTLABORATORY QUESTIONS CHEMICAL BONDING 1. Draw BF, and NF, including dipole moments, are the dipole moments symmetrical or unsymmetrical Describe your reasoning. 2. Why do actual bond angles differ from the ideal bond angles How does a lone pair of electrons affect bond angles 3. Draw 3 resonance structures of SCN. Determine which of the 3 is

What is the pOH of a 0.0250 M HI aqueous solution For HI, K 1.0 101. O 13.056 O 0.944 O 1.602 O 0.00 (there is no OH(aq) in this solution). O 12.398,Find the pH of a solution that is 0.15 M in HCOOH (K, 1.8 x 10) and 0.45 M in HCN (K, 4.9 x 1010) at 25C. O4.83 4.13 3.05 3.87 2.28

If a hydrate of BeSO4 is heated to 250 C, all the water of hydration is lost. On heating a 1.687 g sample of the hydrate, 1.001 g of BeSO4 remains. How many molecules of water occur per formula unit of BeSO4 Submit Show Approach Hide Tutor Steps TUTOR STEP The number of water molecules per formula unit of BeSO4 is equal to the ratio of amount

Humans cannot drink sea water as their daily water requirementbecause sea wateris hypertonic to the liquid inour bodies. But, salt water can be made into freshwater through aprocess is called desalination .While shortages of fresh water is not yet a problem in most of theUnited States, population growth will impact public decision-makingand

A) What is the hybridization diagram of SiH 2 O? B) What is the Lewis Diagram for SiO and the hybridized Si atomdiagram in SiO?

Please fill in the following table. Thanks for all the help! Give the pKa and pKb of weak acids and bases. For each solution, calculate the pH of a 0.1000 M solution, and calculate the volume of 0.1000 M NaOH or HCl that would be required to titrate a 10.00 mL sample to the equivalence point. To fill-in the table below, answer the subsequent

acid or base type strong acid strong base weak base weak acid weak acid CH3COONa weak base compound HCI KOH NH3 CH3COOH NH4Cl pka pkb initial pH (calculated) volume titrant (mL)

https QUESTION 5 Draw the Lewis structure of SeCl6 in your scrap paper and answer these questions nonbonding electron pair(s). The Se atom is The Se atom has hybridized. The molecular shape of SeCl6 is As for nonpolar versus polar, SeCl6 is

Honda produces a hybrid electric car called the Honda Insight. The Insight has both a gasoline-powered engine and an electric motor and has an EPA gas mileage rating of 33 mi per gallon on the highway. What is the Insight's rating in kilometers per liter? Express your answer using two significant figures.

Consider the titration of sudsy ammonia with citric acidand answer the questions below. Circle the correct descriptor for the citricacid. weakacid strongacid strongbase weak base Circle the correct descriptor for the sudsyammonia. weakacid strongacid strongbase weak base In the plot provided below, sketch what youbelieve the titration curve will

Ina hospital laboratory, a 10.0 mL sample of gastric juice (predominantly HCl),obtained several hours after a meal, was titrated with 0.1 M NaOH toneutrality; 7.2 mL of NaOH was required. The patients stomach contained no ingested food or drink, thus assumethat no buffers were present. What wasthe pH of the gastric juice?

A hemoglobin molecule contains:

1) four iron ions and four a subunits that are linked by an extensive interface, which includes the carboxyl terminus of each chain. 2) four iron ions. 3) two a subunits that are connected to two subunits via disulfide bonds 4) both alpha helices and beta sheets. 5) four a subunits that are linked by an extensive interface, which includes the

Halflife equation for firstorder reactions t2 where t2 is the halflife in seconds (s), and k is the rate constant in inverse seconds (s). Part A What is the halflife of a firstorder reaction with a rate constant of 3.40x104s Express your answer with the appropriate units. View Available Hint(s) H Value Units 0.693 (PHIC) ,Part B What is the rate

The helium ion, He+, has energy level similar to those of the hydrogen atom, since both species have only one electron. The energy levels of the He+ ion are given by the equation En = 2 n ? 5248.16 kJ/mole n = 1, 2, 3, 1. Calculate the energies in kJ/mole for the four lowest energy levels of the He+ ion. E1 = _______-5248.16________ kJ/mole E2 =

Electron Configurations and the Periodic Table In the periodic table elements are organized by atomic number, the number of protons in an atom. The vertical columns in a periodic table are called groups, while the horizontal rows are called periods. Atomic number increases from left to right across a period and from top to bottom down a group. A

1. If a reaction mixture initially contains a CO concentration of 0.1510 M and a Cl2 concentration of 0.179 M at 1000 K. What is the equilibrium concentration of CO at 1000 K? 2. What is the equilibrium concentration of Cl2 at 1000 K? 3. What is the equilibrium concentration of COCl2 at 1000 K?

For the following reaction, Kc 255 at 1000 K. CO (g) Cl (g) COCl (g)

If a patients blood pressure is 125 over 55 mmHg, what is it in atmospheres (atm) blood pressure atm over atm

(a) Describe briefly the forces acting on a fluid as it flows through a pipe bend. (4 marks) (b) A reducing bend is fitted in a pipeline transporting water at a rate of 85 kgs. The bend is oriented in a horizontal plane and tapers from 600mm diameter at inlet to 300mm diameter at outlet, deflecting the flow by an angle of 45 degrees. The gauge

Part 2 fr view structure Part 3 out of 4 edit structure ... HSO4 (aq) view structure 0H edit structure ... view structure C HO H3O HO HSO4 HSO4,Choose the most appropriate reagent(s) for the first step of the synthesis. A E NaOCHCH3 KOC(CH3)3 Br 50 HSO4HO reagent(s) B HSO4, HgSO4, HO D HBr OH

Part A Watch the animation and identify the correct conditions for forming a hydrogen bond. Check all that apply. View Available Hint(s) The CH4 molecule exhibits hydrogen bonding. A hydrogen bond is possible with only certain hydrogencontaining compounds. Hydrogen bonding occurs when a hydrogen atom is covalently bonded to an N, O, or F atom. A

Is H2 , Pd/C okay to be used to reduce the alkene? Will it notaffect the benzene? Or are there better ways to reduce this?

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Part A Draw the products which result when oct3yne is heated in basic potassium permanganate solution. Check all that apply. D CHCH,CH,CO2 K D CHCH,CH,CH, CO2 K CH3CO K L CH,CH,CO, K Submit Request Answer

Part D. Q10) Chemical Mathematics, Dimensional Analysis or FactorLabel Method Use Factor Label (unit analysis) method and answer the following questions. Include all calculations to receive credit (a) A patient was prescribed 20.0 mg of lithium every 12 hours to treat their medical condition. If the lithium comes in the form of lithium carbonate,

Given the data below, calculate y(3.4) using 3rd degree Newton interpolation. X y 2.5 7 3 8 4 2 5 1

In the region indicated with an arrow in the phase diagram shown below, which of the following statements are true 1300 L (liquid) . T(C) 1200 20 36 40 wt Ni liquidus solidus (solid) 50 Select one or more a. The proportion of a phase increases going from right to left at a fixed temperature. b. The relative weight fractions of L and a phases can

Given the list of strong acids and strong bases below, identify the weak acid. 6 Strong Acids HCIO, perchloric acid HCI HBr HI hydrochloric acid NaOH hydrobromic acid KOH hydroiodic acid HNO, nitric acid HSO, sulfuric acid O NaOH O HSO3 O HSO4 6 Strong Bases LIOH lithium hydroxide sodium hydroxide potassium hydroxide Ca(OH), calcium hydroxide

Given the following Ksp chart, rank the salts listed below in order of molar solubility. Substance AgBr AgBrO3 Ag2CO3 AgCl Ag CrO4 Ag2 CrO7 Agl AgSCN Al(OH)3 BaCO3 most soluble X FeS Ksp 7.70 x 1013 5.77 x 105 6.15 x 1012 1.56 x 1010 9.00 x 1012 2.00 x 107 1.50 x 1016 1.16 x 1012 1.26 x 1033 8.10 x 108 X Li2CO3 Solubility Product Constants (at

Given the following data for ethylene glycol (molar mass 62.07 gmol) at 1 atm, calculate the amount of heat (in kJ) given off when 19.36 g of gaseous ethylene glycol at 257.6 C is converted to liquid at 137.2 C at constant pressure. Measurement AHfusion AHvaporization Normal Boiling Point Normal Melting Point Cs, solid Cs, liquid Cs.gas Ethylene

1. Write the name for some of the compounds used in this experiment: a. Na 2 HPO 4 b. MgSO 4 c. Zn(NO 3 ) 2 d. Ba(NO 3 ) 2 e. NaHCO 3 2. What are the signals for chemical reactions that you will look for in this experiment? 3. What are the rules for naming ionic compounds when the metal can have more than one charge (like

Type A customer has a demand given by P = 120 Q. A representative Type B customer has a demand given by P = 150 0.5Q. Your costs of production are T C = 20Q [3rd degree Price Discrimination]Using our Type A and Type B consumers from the previous question, and assuming now that our monopolist is restricted to 3rd degree price discrimination: (a)

Oxidation states 1-4 S in AgSO3 M in MnO4-1 P in p4 Cr in Cr2O7-2

Mn Wn in Mn Oy Sin A5 SO 3 Pin Py Crin Cr 02 Oxidation states.

Given that 1 gallon 4 quarts and 1 quart 946 ml, use unit analysis to convert the volume of a 9.95gallon aquarium into quarts, milliliters, liters, and cubic centimeters (1 cm 1 mL). Convert the final value in cmsto scientific notation. Show all of your equations with all units and all unit conversion factors. Also, show results with correct

What is the ester responsible for the flavor and odor of the following fruit? a. banana b. orange c. apricot

3) Garnet typically has the chemical formula (Fe, Mg, Ca, Mn)3 AP2Si 3012 The formula can be broken up into structural sites (spaces where cations of a certain size range can occupy) X3Y2Z3012 where the Xsite is coordinated with 8 oxygen anions, the Ysite is coordinated with 6 oxygen anions, and the Zsite is coordinated with 4 oxygen anions. Using

One year consists of 365 days. This is closest to how many seconds (Remember the following conversion factors kilo (10), mega (106), giga (109), and tera 102.) Select the correct answer below 32 kiloseconds 32 megaseconds 32 gigaseconds 32 teraseconds

How does one convert to mL and moles from the grams?

10. Collect the crystals by suction filtration and allow to air dry for 510 minutes. Data Amount of benzaldehyde used volume 5.5 mass 5.25 moles Amount of acetone used volume mass moles 1.43 Theoretical yield of dibenzalacetone moles mass mL grams (density of benzaldehyde 1.045 gmL) moles (MW of benzaldehyde 106.12 gmole) mL grams (density of

What is the [OH - ] in a 0.010 M sulfuric acid(H 2 SO 4 ) aqueous solution at 25 C? Pleaseshow all steps.

The formula for ammonium sulfate is a. NH4(SO4)2 b. NH4SO4 c. (NH4)2(SO4)2 d. (NH4)2SO4

Which of the following molecules can form hydrogen bonds Check all that apply. ammonia, NH3 U H hydrogen bromide, HBr H Br water, HO H H H butane, C4H10 H H H hydrogen, H H H H H H H H

The number of protons, neutrons and electrons for strontium ion O Protons38, neutrons 48, electrons 38 O Protons38, neutrons 50, electrons 40 O Protons38, neutrons 50, electrons 36 O Protons38, neutrons 50. electrons 38 O Protons 36, neutrons 50. electrons 38,Which of the following statements are correct about modern atomic theory O Matter

The formation of green patina (copper carbonate) on a copper roof protecting the underlying copper metal is an example of A) corrosion B) cathodic protection C) electrolytic protection D) galvanization E) amalgamation UUL

Which food has more Calories 3 oz of salmon, which contains 17 g of protein and 5 g of fat, or 3 oz of chicken, which contains 20 g of protein and 3 g of fat (Compare the Calories after taking significant figures into account.) Hint One gram of protein or one gram of carbohydrate typically releases about 4 Calg, while fat releases 9 Calg. 3 oz of

A nitrogen atom can undergo sp2 hybridization when it becomespart of a carbonnitrogen double bond, as in H2C=NH. (a) Using a sketch, show the electron configuration of sp2hybridized nitrogen just before the overlapping occurs to make thisdouble bond. (b) Using sketches (and the analogy to the double bond in C2H4),describe the two bonds of the

15. Which of the following is a pure substance A) blood B) block of aluminum C) air D) orange juice 16. Which of the following is an example of a homogeneous mixture A) sand B) copper C) air D) sugar 17. What is another name for a homogeneous mixture A) pure substance B) compound C) solution D) element 18. Dirt is an example of a(n) A) homogeneous

Which of the following is an isotope of Lithium. You can use the holotable or images to help you. a) A lithium atom with an atomic number of six and a mass number of seven b) A lithium atom with an atomic number of five and a mass number of six c) A Lithium atom with Atomic number3 and Mass number7 d) A lithium atom with an atomic number of four

Which of the following has the highest average degree of polymerization (DP) with M254000 gmol H N(CH) CH) n 0(CH)50 ra Polymer 1 wwwCH ) en Polymer 3 n (0. P ) Polymer 2 n CH CH o) Polymer 4,Mn is equal to... Mw is equal to 2 1.363 gmol 5109.9 gmol 3861 gmol 2832 gmol 3 .......gmol 8558 gmol,Mw is equal to ............ 3 ..gmol 8558 gmol

The following is an example of a(n) Question 2 (1 point) The following is an example of a(n) H.C OH M.C CH Question 3 (1 point) The following is an example of a(n) CH N A,The following is an example of a(n) Question 5 (1 point) The following is an example of a(n) CH H Question 6 (1 point) The following is an example of a(n) CH, N N,HC OCHy

Which of the following explains why sugar dissolves easily inwater? A. Sugar is nonpolar solute and water is polar solvent. B. Both sugar and water are polar molecules C. Sugar is polar solute and water is nonpolar solvent D. Both sugar and water are nonpolar molecules

14) Which of the following compounds is optically active a. trans1bromo3chlorocyclobutane b. cis1,4dimethylcyclohexane c. cis1,3dimethylcyclohexane d. trans1,3dimethylcyclohexane CHS MC CH3 CHE CH3 CH3 Br,6) Which of the following compounds (choose only one) is never chiral (4 points) 2,3dibromobutane 1,3dibromobutane 1,2dichlorobutane

Which of the following is chiral? (Answer is E) A) cis-1-bromo-3-chlorocyclobutane B) trans-1-bromo-3-chlorocyclobutane C) cis-1,4-dimethylcyclohexane D) cis-1,3-dimethylcyclohexane E) trans-1,3-dimethylcyclohexane Could you please provide a picture/diagram of each chemical compound, that's what im finding hard and relating that to whetherit

Which of the following best describes an ionic bond It is a transfer of an electron from a nonmetal to a metal metal to a nonmetal metal to another metal nonmetal to another nonmetal

A liquid in the lab has a density of 1.17 gcm. What is the volume in liters of 3.02 kg of the liquid

Name and Surname Rana Nur AYTEKIN Homework will be submitted to your instructor during NEXT Tuesdays lecture. No extensions will be given 1) Assign the configuration of these compounds as R or S. a) ... H CHI H3C HO b) OH Br 2) Show (asterisk, ) and determine how many chirality centers are present in the following compound. c) H CH3 OH

Assessment Question 1 (1 point) NaOH is an organic compound. Save True Question 2 (1 point) CHCHCHCH3 and CH3CHCH(CH3)2 are isomers. Save False True False Question 3 (1 point) 3,3,5trimethylhexane has 6 carbon atoms.(Hint Draw the structure.) Save Save True False Question 4 (1 point) The boiling points of the straightchain alkanes increase with

Element compound homogeneous mixture (heterogeneous mixture) 4) A piece of gold has a mass of 49.75 g. What should the volume be if it is pure gold Gold has a density of 19.3 gcm (3 points) Dmv 19.32gcm3749.75g 5) How many protons, electrons, and neutrons are present in an atom of Ca 2041 (3 points)

The molarity of the saturated nickel (II) chloride solution is 5.210 molL . Since you made 1 L of this saturated solution, determine the mass (g) of nickel (II) chloride required to make this saturated solution (dont worry about added excess, just calculate the mass of nickel(II) chloride required to make the solution saturated. Molar mass NiCl

Fill in the Bohr Model electron configuration for aluminum and, based on configuration, state if this element will be unreactive or reactive. the Configuration Quantum Number (n) n1 n 2 n 3 Number of Electrons Select Select Select This element is expected to b Select unreactive reactive

Part 1 Table of Electron Pair and Molecular Geometries Total Number of 3D drawing of shape Toothpicks for all toothpicks 3 3 Name Name of geometry of all toothpicks (electronpair geometry) Number of toothpicks removed 0 O 3D drawing of shape after removing toothpicks Name of geometry after removing toothpicks (molecular geometry,Total Number of

Name Frank (Ram Date Unit Chemical Reactions Balancing Equations Wksh 3 2. cobalt(III) bromide fluorine cobalt(III) fluoride bromine Directions Convert the following word equations into formula equations then balance them. 1. zinc nitrogen zinc nitride 3. potassium hydroxide potassium oxide water Class period 4. lithium tin(IV) sulfite lithium

ANO XT H3CCCCH3 Alkynes are reduced to trans alkenes by a process called dissolving metal reduction. The reaction uses sodium or lithium metal as the reducing agent and liquid ammonia as the solvent. The method is specific in the formation of trans alkenes from alkynes. The method involves two successive transfers of single electrons from the

The fictitious element concordium (Cn) has two naturally occurring isotopes 65Cn (64.9235 u) and 68 Cn (67.9385 u). The atomic mass of concordium is 65.91 u. What is the percentage abundance of 65Cn Select one A. 66.42 B. 13.65 OC. 67.28 O D. 32.72 OE. 87.35

CHEM 1A 22) Zinc reacts with aqueous sulfuric acid to form hydrogen gas Zn (s) HSO4 (aq) ZnSO4 (aq) H (g) FINAL EXAM PRACTICE WORKSHEET In an experiment, 201 ml. of wet Hy is collected over water at 27 C and a barometric pressure of 765 torr. How many grams of Zn have been consumed The vapor pressure of water at 27 C is 26.74 tom. A) 4.38 x 106

Molybdenum, Mo, adopts the tungsten structure (Z=2). The densityof the metal is 10222 kg.m-3 and the cubic lattice parameter is a =0.3147 nm. Estimate the molar mass of molybdenum?

Mole Lab will rate answer Mole Laboratory Materials & Apparatus: Scale Graduated cylinder(s) Paper or plastic cups (8 oz or 16 oz) New container of small candy (jelly beans, Skittles, M&Ms,or raisins) New container of cereal (any cereal that is a single shape andrelatively small such as Cheerios, Kix, or Captain Crunch) Water Sodium Chloride

What is the molarity of the protein solution if the osmoticpressure is 6.20 torr and the temperature is 23.1C? Assume thatthe van't Hoff factor is 1.00. _____M

How do I solve these questions? (please show work and provideanswers)

Fertilizers show the different percentage of components in the fertilizer by printing a NPK rating on the bag. This strands for nitrogen phosphorus potassium. A rating of 13 10 10 contains 13 nitrogen by mass, 10 phosphorus (actually PO), and 10 potassium (actually KO) by mass. A fertilizer company made a fertilizer claiming a rating 15 0 0.

Evaluate the IR spectrum of the carboxylic acid product(4,5-dimethyl-cyclohexene-1,2-dicarboxylic acid). Comment on thekey peaks for the product and how IR can be used to distinguish theanhydride and carboxylic acid (presence and absence of peaks). if you are not sureabout anything, this is okay, but please do not answer the part youare uncertain

Transmittance 120 110 100 90 80 70 60 50 IR spectrum of 4,5dimethylcyclohexene1,2dicarboxylic acid 4000 3091.26 3000 2960.19 1614.56 171942 2000 Wavenumbers (cm1) 1527.18 1133.98 1000 101

Model 1 Ionic Charges for Selected Elements Metals form cations (positive ions) Nonmetals form anions (Hydrogen can form both) H Lit Na K Mg Ca Cr Mn Fe Co Cu Zn Cr Mn Fe Co Cu Sp Transition Metals Ba Cations Ag Cd Au Au Nonmetals (shaded) 0 S Ct Br Sn Sn Pb Pb4 N p. 1. Based on the information in Model 1 a. Identify 4 metals that only form 1

Meet curcumin, a main ingredient in turmeric, a delightful and fragrant spice with numerous benefits. HO. curcumin OH,Consider the vibrant color and potent smell of turmeric. Propose the reasoning for these physical properties,There are two alkenes present in the structure of curcumin. Are they cis, trans, or neither (input one word only)

34.259 D30.0mL 1.3gmL 5. If the density of propylene glycol (antifreeze) is 1.04 gmL, what is the volume in mL of 4.92 lbs of antifreeze (1 lb 454 grams)

The Michaelis constant, K m , is often spoken of as if it were a measure of the affinity of the enzyme for the substrate: the lower the K m , the higher the binding affinity. This would be true if K m were the same as K d (the equilibrium constant for the dissociation reaction), but it is not. For an enzyme-catalyzed reaction A. In terms of these

Express your answer as a chemical formula. a-Write a formula for the compound that forms from potassium and acetate. b-Write a formula for the compound that forms from potassium and chromate. c-Write a formula for the compound that forms from potassium and phosphate. d-Write a formula for the compound that forms from potassium and cyanide. e-Write

The phrase "like dissolves like" refers to the fact that________. polar solvents dissolve polar solutes and nonpolar solventsdissolve nonpolar solutes condensed phases can only dissolve other condensed phases polar solvents dissolve nonpolar solutes and vice versa gases can only dissolve other gases solvents can only dissolve solutes of similar

9. (6 points) Exceptions to the 4th row of the periodic table. are represented by chromium and copper in A) the Aufbau Principle B) Hunds Rule C) the Bohr Theory D) the Heisenberg Principle E) the Pauli Exclusion Principle

Match each term with the correct phase change. Gas to solid Gas to liquid Liquid to gas Solid to gas Choose melting fusion vaporization sublimation condensation deposition Choose Choose

What mass of potassium nitrate should be used to form 0.515 moles of nitrogen according to the following reaction The molar mass of KNO3 is 101.11 gmol. 4 KNO3(s) 2 K2O(s) 2 N2(g) 5 O2(g)

Match the following IR spectra to the corresponding molecule T 100 80 60 40 20 9000 Butt OH 2000 Wavenumberlcm1 1000 peaks (wavenumber)3300, 2950, 1720, 1420, 1450, 1350, 1080, 1109, 1000, 950, 875, 430. B OH 400 C D OH

Mass of Cube Mass (g) Caliper Method Cube length (cm) Cube volume (cm) Cube density (gcm) 0.94 1.002 ,3 4 Use cubes length to calculate volume. Record in Lab Data Use cubes mass and volume to calculate density. Record in Lab Data

The mass of an atom of silver is 1.79 10 -22 g.How many atoms are in a 0.42 lb sample of silver?(Enter your answer in scientific notation as follows: 1.00E+2 isequivalent to 100). How do you solve?

Have you ever consumed an acid or a base? Yes, you have! Acids and bases are found all around youin the food you eat, the beverages you drink, in many of the everyday household products at home, and even inside you! In this virtual simulation, you will learn the fundamentals of acids and bases and go through some of the ways they can be

how many packages of hotdog buns and hot dogs do you need for both parts B and C if the number of each hotdog bun package conatins 8 buns, and each hotdog package contains 10 dogs.

Part B For this picnic, you need to feed at least 700 people. If you want to feed everyone, but still have equal numbers of buns and hot dogs, what is the minimum number of packages of buns and hot dogs you need, respectively Express your answer as two integers separated by a comma. View Available Hint(s) Submit Part C packages Previous Answers

Erin, a student at NJIT, is traveling from her parents house south of Richmond, VA to Newark NJ. The overall distance is 360 miles. She leaves at 4.00pm and arrive in Newark at 10.00 pm. 6 b T (hr) Distance (miles) p 1.0 40 2.0 90 3.0 160 1) What was her average speed Write a general expression to determine average speed. 3) What was her speed at

Elemental iridium is composed of two stable isotopes, iridium191 and iridium193. (a) How many protons and neutrons are found in these two isotopes of iridium Iridium191 has has protons and protons and (b) The isotopic notation for iridium191 is Ir, where A is The isotopic notation for iridium193 is Ir, where A is 193 neutrons. neutrons, iridium193

The equivalence ratio of a combustion process often isdetermined by extracting a sample of the exhaust gas and measuringthe concentrations of major species. In a combustion experimentusing iso-octane fuel (C8H18) and air, gas analyzers monitoring theexhaust gas measure a CO2 concentration of 6 percent by volume anda CO concentration of 1 percent

Elemental sulfur (1.256 g) is combined with fluorine, F2, to give a compound with the formula SFx, a very stable, colorless gas. If you have isolated 5.722 g of SFx,what is the value of x? Please solve showing full work.

An element A contains 3 protons, 3 electrons and 4 neutrons, it is when it has 3 protons, 2 electrons and 4 neutrons. It becomes

The electronic absorption spectrum of molecular oxygen has an absorption band with a maximum at 150 nm and a continuum range starting at around 100 nm. Q7B What is the origin of the continuum range In which range of the atmosphere is continuum range relevant to protecting the earth. Keep it simple, but you need to use buzz words. (5 pts) Answer

The element in this list with chemical properties similar tomagnesium is Question 20 options: boron. chlorine. strontium. sodium. carbon.

help please

The lithiumiodine battery is used in pacemakers to generate small electrical impulses that trigger the heart to beat according to the following equation. Identify the species oxidized. 2 Li(s) I (s) 2 Lil(aq) O Li 012 O Lil None of these

This is the line spectrum for strontium (Sr) strontium Blue 1 420 Blue 2 500 wavelength (109 m) What are the approximate wavelengths for the brighter lines in the visible spectrum (between 250 700nm) for this compound The unit of nm is assumed. Violet 415 430 Blue 3 440 Orange Red 640 360 620 400 600 660

Lightweight and strong materials are the key to habitation. Thematerial used to build a habitat on Mars has a specific gravity of1.3. How much does one cubic yard of material weigh on Mars innewtons? The gravity on Mars is 3.7 meters per second squared.

D Question 55 Acids always have hydrogen(s) at the I of the chemical formula. 2 pts,In the Lewis structure for sodium sulfide, how many valance electrons does each element have Number of valence electrons on sodium ion Number of valence electrons on sulfide ion

While driving your rental car on your vacation in Europe, youfind that you are getting 10.2 km/L of gasoline. What does thisvalue correspond to in miles per gallon?

Draw a qualitatively correct phase diagram for water.Label the triple-point and the critical point withthetemperature-pressure combinations that describe them. Also,label the normal melting and boiling points with thetemperature-pressure combinations that describe them.Describe the one unusual feature ofthe phase diagram for water, compared to