Chemistry in Daily Life Questions and Answers

What is the abbreviated noble gas configuration for Cobalt O Ar 3d O Ar 4s 4p7 O Ar 4s 3d7 O Ar 3d7 4s24p

How many unpaired electrons are in an atom of Cu in its ground state OA 2 B 3 OC 1 OD 9

The activation barrier for a reaction is 106 kJ mol If an enzyme increases the rate of the reaction by a factor of 107 at 310 K what is the activation barrier kJ mol for the catalyzed reaction Enter your answer as an integer

efine the technical term specific heat

alculate the quantity of heat absorbed by 30 0 g of water when its temperature is raised to 67 9 C om 24 3 C

A molecule has a central atom surrounded by 2 lone pairs and 3 atoms The best description for the shape of the molecule is OA see saw OB T shaped C trigonal bipyramidal OD trigonal planar

An aqueous solution of sodium sulfate is allowed to react with an aqueous solution of lead II nitrate The net ionic equation does NOT contain which of the following species OA Na aq B SO42 aq OC Pb aq OD PbSO4 s

Which of the following is most likely to form an anion A phosphorus OB tin C zinc OD lithium

If it takes 50 mL of 0 5 M Ca OH 2 to neutralize 125 mL of sulfuric acid what is the concentration of the acid A 0 5 M OB 5 M C 0 4 M OD 0 2 M

Explain why the temperature change for gold is so different from the temperature change of water

What health and safety hazards are associated with waste generated by electroplating companies What is being done to reduce the impact that waste is having on the environment and human health What are some of the toxic substances that can escape from electronic waste on the the environment What are the potential effects of these chemicals on your health Important Your grade is linked to both parts of the assignment Wait for feedback from your teacher on the components of Part I before working on and completing your research paper Part II Writing Your Research Paper 1 Write your research paper incorporating the feedback and direction from your teacher Your research paper should have an introduction body and conclusion Typically you would have one paragraph for each of your introduction and conclusion The body of your research paper can have multiple paragraphs The focus of the body of your paper should be the three main points you submitted to your your teacher in Part I 2 Include any relevant data you obtained from your research to support your main ideas Ensure your data is obtained from acredible source 3 Use in text citations to reference any information you wish to present that is not your own original idea such as data and theories opinions of others 4 Submit a reference list that includes all the sources you used in your research paper Ensure that both your in text citations and reference list are completed according to APA style

If the moles of KHP are 0 00756 and the volume of the sample is 25 00 ml What is the Molarity of NaOH if it is titrated with 15 32 ml 0 116 M 0 0004935 M 0 4935 M 0 000158 M

What are the possible values of I if n 3 OA 0 1 or 2 OB 3 0 or 3 OC 0 1 2 or 3 D 10 1 2 or 2

de That is the H concentration of a solution that has a pH of 9 4 Be sure to include units

11 Write the correct IUPAC A OH CH CH CH3 A

Which of the R groups displayed below for the following compound can induce muscarinic ag activity R O Select one a Only I b All of them c I and II d II and III 1 Methyl B groups Il Amino Ill Phenyl

3 At 20 C a saturated solution holds 65 2 g of KBr in the mass percent of KBr in water 45X2 100 165 29 652 165 2 X 100 39 467 of KCBV 4 If the temperature for the solution in question 3 is raised to 60 C but no more solute is added would you expect the solution to be saturated unsaturated or supersaturated Why

16 40 Rank the following dienophiles from least reactive to mos reactive in terms of reactivity in a Diels Alder reaction O

From the condensed structural formula determine if the structure represents a saturated fatty acid a monounsaturated fatty acid or a polyunsaturated fatty acid SATURATED FATTY ACID MONOUNSATURATED FATTY ACID POLYUNSATURATED FATTY ACID CH3CH CHCHCH COOH

What is the name of the phase change that occurs when carbon dioxide goes from the solid state immediately to the gaseous state Omelting Ovaporization condensation sublimation deposition

Some vitamins and dietary supplements are stored in opaque darkened bottles to protect them from UV light because UV light would cause a reaction Which word could be used to describe UV light in this situation O A Reactant O B Catalyst O C Solvent O D Enzyme

why does iodine dissolve in hexane does i2 dissolve in ccl4

13 52 Kate s blood volume is 3 9 L After three months of diet and exercise if her blood glucose is 146 mg dL how many grams of glucose are in her blood

A chemist prepares a solution of vanadium III bromide VBr by measuring out 3 00 g of VBr3 into a 300 mL volumetric flask and filling to the mark with distilled water Calculate the molarity of Br anions in the chemist s solution Be sure your answer is rounded to the correct number of significant digits 1 mol x10

What is the strongest intermolecular force possible between molecules of the following structure ion dipole interactions London dispersion forces dipole dipole interactions hydrogen bonding O covalent bonding HHHH H C C S H III HHHH

Which of these compounds of Pb2 is soluble in water OPbSO4 Pb ClO3 2 OPbS Pb OH 2 PbCl

The compounds below all have the same formula C7H14 A B Which compound has highest surface tension Compound D NA Compound B Compound C Compound A C D

The intermolecular force known as dispersion forces can be described as an attraction between a None of these highly electronegative atom in one molecule and a partially positive hydrogen atom in another partially negative region in one molecule and a partially positive region in another positively charged particle and a partially negative region in a molecule temporary dipole in one molecule and an induced dipole in another

Pressure A O melting O deposition O vaporization O freezing C B H Temperature E I What phase change will occur if the substance begins at point H and the pressure and temperature are decreased to end up at point G

A liquid has a mass of 154 50g and a volume of 150 mL Calculate the density of the liquid

Determine the molecular geometry of ammonia NH3 O trigonal pyramidal tetrahedral O trigonal planar O bent

Which substance will have the highest boiling point a CC14 Ob CF4 Oc CBI4

Aldehydes and ketones react with one molecule of an alcohol to form compounds called hemiacetals in which there is one hydroxyl group and one ether like group Reaction of a hemiacetal with a second molecule of alcohol gives an acetal and a molecule of water ROH H W OH OR Aldehyde ketone OH ROH H Draw the structural formulas for the hemiacetal and the acetal formed between the following compounds Alcohol OR OR H O You do not have to consider stereochemistry Use separate sketchers for the hemiacetal and the acetal Draw the hemiacetal in the left sketcher and the acetal in the right sketcher sign for the dropdown menu Separate the two sketchers using the

Complete the following unit conversion 6 991 105 g to kg

What is the density in g ml of a sample that weighs 1 89 kg and occupies 4 980 mL I I

5 1 punto What is the molarity of an aluminum acetate AI C H3O2 3 solution that has 0 333 moles dissolved in 0 250 liters 0 00774 M 1 2 M 0 75 M 1 33 M Anterior Sig

2 2 If you have 266 grams of Fe3O4 and 6 60 grams of H how many grams of water will be produced Mark only one oval 266g 1 58 9 grams of water 46 3 grams of water 82 8 grams of water 99 7 grams of water 99 HE X Joby 266g Imole 234 55 Am d

Mercury has a density of 13 6 g mL What is the mass of a 0 24L sample

Which of the following is the MOST electronegative Mg F O Please just put in name as it appears here

Substance X has a triple point of 5 2 atm and 57 C and a critical point of 72 8 atm and 31 1 C Under typical atmospheric conditions P 760 torr T 25 C solid X will a melt Ob boil c sublime d condense

n 6 n 5 Express the frequency in inverse seconds AEO

In the reaction 6Na 2H3PO4 2Na3PO4 3H2 how many liters of hydrogen gas at STP are produced from 234 grams of sodium a b C d 2 13 liters H 113 95 liters H 448 21 liters H 1024 33 liters H

Determine the polarity of H 0 Please type in the answer as either polar or nonpolar

3 In order for a triacylglycerol molecule to form which of the following must be true a Sphingosine must be present to link the fatty acid together b Water molecules must be added to form the bonds a Ob C c Three identical fatty acids must be present d A dehydration synthesis reaction must occur e Hydrogen bonds hold the components together

Given the following reactions CaCO3 s CaO s CO g is the enthalpy of the reaction C s graphite O2 g CO2 g AH 393 5 kJ AH 178 1 kJ CaO s C s graphite O2 g CaCO3 s kJ

1 How many moles of H are need to produce 6 23 moles of NH3 3H N 2NH3 3 12 mol 106 mol 9 35 mol 18 7 mol

What is the percent composition of H3PO4 1 01 H 30 97 P 64 00 O 3 09 H 31 60 P 65 31 O 6 06 H 61 96 P 32 00 O 37 5 H 12 5 P 50 00 O

Select the correct meaning of the term chemiluminesence from the list below 1 A chemical reaction where an excited state is formed releasing energy in the form of a photon of light on relaxation 2 The release of light by a chemical reaction within a living organism 3 An excited state is formed by the absorption of electromagnetic radiation which rapidly relaxes to release energy in the form of a photon of light 4 An excited state is formed by the absorption of electromagnetic radiation which slowly relaxes to release energy in the form of a photon of light Chemiluminescence is best described by statement 2

13 42 Predict the major product for each of the following reaction sequences a b 1 Hg OAc 2 MeOH 2 NaBH4 1 Hg OAc 2 2 NaBH OH

Draw the most stable chair conformation for the compound name given below 15 2S 4S 2 isopropyl 1 4 dimethylcyclohexane