Answers created by Ernest Z.
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The uranium series involves the nuclear decay of, amongst others, uranium-238 into lead-206. A series begins with the following set of emissions, write the seven decay processes that represent this sequence?
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My book says this is cis. But I can't see it. Is this a mistake or what?
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You have 150 grams of water at 25C and 40 grams of water at 50C. You mix them together in a calorimeter to find the final temperature of the mixture. Using your incredible math skills, calculate what the final temperature of the mix should be.?
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What is "occlusion"?
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Why the colour of phenol changes on standing in air?
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How many grams of acetic acid are present in 250.0mL of vinegar, assuming the 5% v/v indicated on the label is accurate?
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A shipment of crude sodium carbonate must be assayed for its #"Na"_2"CO"_3# content. [ . . . ] A #"10.00-mL"# sample is titrated to the equivalence point with #"16.90 mL"# of a #"0.1022 M HCl"# solution. What is the #%# #"Na"_2"CO"_3# in the sample?
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Concentration Measurement of Calcium Chloride?
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There are copper(III)ions in wastewater that needs to precipitate to copper(II)hydroxide at ph 9.2. Wastewater pH is 3.5. PH is adjusted with 50-w% NaOH. NaOH solution density is 1.43 kg/l. How much you need NaOH when wastewater flow is 3800 m3/d?
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There are copper(III)ions in wastewater that needs to precipitate to copper(II)hydroxide at ph 9.2. Wastewater pH is 3.5. PH is adjusted with 50-w% NaOH. NaOH solution density is 1.43 kg/l. How much you need NaOH when wastewater flow is 3800 m3/d?
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Converting between units of pressure?
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How do you identify aldehydes in skeletal structures?
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Indicate the molecular geometry, electronic geometry and polarity of the following molecules or ions??
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What is the product of 4-ethoxybenzaldehyde and acetone?
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How many unpaired electrons in cu+4?
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(LARGE MULTIPLE PART QUESTION - Help with any of the parts is greatly appreciated!) The antibiotic penicillin has a thiazolidine ring in its structure. The compound thiazolidine, C3H7NS, is a molecular weak base with a pKb of 7.69?
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(LARGE MULTIPLE PART QUESTION - Help with any of the parts is greatly appreciated!) The antibiotic penicillin has a thiazolidine ring in its structure. The compound thiazolidine, C3H7NS, is a molecular weak base with a pKb of 7.69?
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Calculate the Molality of sulphuric acid solution in which mole fraction of water is 0.85 ?
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Will present the highest value of the normal boiling point??
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How would #"ethane"# be prepared from #"propanoic acid"#?
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What is the oxidation state of cr the complex [CrCl2(H2O)4]^+?
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How would i answer this???
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A 1.0 M solution of a weak acid, HB, has an [H3O+] equal to 0.025 M. Find the value of Ka. (HB + H2O --> B- + H3O+)
Can anyone help?
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A 11.2 g sample of an aqueous solution of nitric acid contains an unknown amount of the acid.
If 23.2 mL of 0.873 M sodium hydroxide are required to neutralize the nitric acid, what is the percent by mass of nitric acid in the mixture?
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What is the composition of car-exhaust gas? Is it solely carbon dioxide?
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In a 2.0 liters container are 3.2 moles of IBr. In the 40% of equilibrium the IBr is already disassociated. Determine for the reaction
a. The moles de I2, Br2 and IBr on equilibrium?
b. The value for the equilibrium constant?
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How many moles of potassium Chlorate would decompose on heating to give 60cm^3 of oxygen at 25 degrees Celsius and 1atm?
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How many structural isomers with the formula #C_4H_10O# are possible?
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Thermochemistry problem?
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How many C5H10 geometric isomers are there??
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Calculate the energy of a photon emitted when an electron in a hydrogen atom relaxes from n=5 to n=3?
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Why is chlorine given first priority in naming?
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When electromagnetic radiation is applied to CH3-OH, is there any possibility that the non bonding electrons of oxygen can jump to pi star bond? Or it can only jump to sigma star bond? What are the possibilities here?Or they don't form any bond ?
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100 g of acetylene (#"C"_2"H"_2#) gas is placed in a 20.0 L container at 298 K.
(i) Use the ideal gas equation to calculate the pressure?
(ii) Use van der Waals equation to calculate the pressure?
(#a="4.390 L"^2cdot"atm/mol"^2#, #b="0.0513 L/mol"#)
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Two atoms same atomic mass number but differen atomic number what is difference?
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Which species exhibits a plane of symmetry?
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What is the correct IUPAC name of this compound?
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Total number of geometrical isomer of following compound is?
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Suppose 15.00 mL of 3.0 10–6 M Fe(NO3)3 is added to 15.00 mL of 3.0 10–4 M KIO3. Will aprecipitate form? Explain why. For Fe(IO3)3, Ksp = 1.0 10–14.
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Examine each of the chemical species involved to determine the ions that would be present in solution?
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Please explain...?
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Can palmitic acid be titrated by sodium hydroxide?
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The ordered pairs (R, t) of concentration of R (molar) in the reaction R → P with
time (min) are given as (1, 0), (0.75, 0.05), (0.4, 0.12) and (0.1, 0.18). The order
of the reaction is?
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What is the structure and hybridisation of CH3-?
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Can someone please please help me answer these I dont understand how to do this at all?!!
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A new born infant is found dead, abandoned by the road. The police need to know whether the infant was born dead or alive. An autopsy reveals the infant was dead at birth. How could the medical examiner determine this?
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What are the geometrical isomers of 2-hexene?
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How many chelate rings are present in each of the following complexes?;#["Cu"("trien")]^(2+)#, #["Fe"("ox")_3]^(3-)#, #["Ru"("bpy")_3]^(2+)#, and #["Co"("dien")_2]^(3+)#. Thanks
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Find the ionization energy of #"C"^(5+)#?
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Mechanism of reaction of tertiary methyl chloride with #"LiAlH"_4#?
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Calculate N-Z ratio for Xe-135 and predict the type of decay it will undergo?
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What is the product of the aldol condensation between 4-methylbenzaldehyde and 4-methylcyclohexanone?
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How do you name the polypeptide Ala-Ser-Gly-Val-Thr-Leu?
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The vapour pressure of pure ethanol at #0^@ "C"# and at #60^@ "C"# are respectively #"0.016 bar"# and #"0.470 bar"#. Calculate the normal boilig point of ethanol and its molar enthalpy of vaporization?
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Which compound has the highest boiling point?
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What are tge uses of bicyclodecane?
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Why tertiary alkyl halides doesn't take part in Wurtj reaction?
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How do you find the gas?
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Should we number this molecule right to left or left to right?
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Why is triethylamine (tertiary amine) insoluble in HCl?
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Will a precipitate form?
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Which compound would be the major product of the following reaction?
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How do we use the molar mass of Oxygen to solve this stoichiometry problem?
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Aliquot is 15 ml and i made volume makeup upto 50ml.what will be its dilution factor?
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During the preparation of picric acid,sulphonation is carried out first and after that nitration.Why?And why does the sulphonic group get replaced by the nitro group?
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How to decide the stability of gauche and anti conformation?
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How to convert mass percentages of oxides in to moles - g/mol?
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Can someone please help me with this Question?
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A natural gas has the following composition by volume CH4 = 83.5%, C2 H6 =12.5% and N2=4%. Estimate the following: Estimate the Composition in mole % and Composition in weight %?? .
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A Vernier calipers is used to measure the length, width and the height of the block. The measured values are found to be 1.37 cm, 4.11cm and 2.56 cm respectively. Calculate the volume of the block with the limit of error?
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What is relative number of atoms?
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Can you please solve this question ?
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What volume of methanol (ρ=0.8g/cm^3) needs to be oxidized to produce 500mL 40% formaldehyde (ρ=1.11g/cm^3)?
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Which compound has the highest melting point? State the reason!
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What is firebricks which is used in Down's Cell? What is its role?
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Identify all of the major products?
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Help please?
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How does ripper method work to determine SO2 levels in wine?
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Is Phosphoenolpyruvic acid an intermediary product ( in the process of glycolisis )?
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How many structural isomers can be drawn for Hexane?
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20. Which of the following is the correct structure for 2 –methylhexan-1,4-diol?
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Three beakers each contain #"100 mL"# of acidic solution with a #"pH"# of #3.00#. The acids in the beakers are #"HCl"#, #"HNO"_2#, and #"HI"#. If #"50 mL"# of #"0.1 M NaOH"# is added to each beaker, which resulting solution will have the lowest #"pH"#?
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Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide. When 0.575g of Na is added to 100.00g of water, the temperature of the water rises from 25.00°C to 35.75°C. Calculate ΔH for the reaction, in kJ/mol. How do I solve this?
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How will you convert 2 methylpent-2-enal to 2methylpentanal?
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Would 4-methyl-1cyclohexene have a signal to the left of 3000 in the IR?
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Explain where I did it wrong: The entropy change for the decomposition of 1 mol of KClO3 is 494J at 25celsius. Calculate the entropy value for O2 if the entropy value for KClO3 and KCl are 143 J/mol-K and 82.6 J/mol-K, repspectively?
2KClO3 --> 2KCl+3O2
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Determining the ethanoic acid content of a commercial brand of vinegar?
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Why are the electron affinities of beryllium and magnesium is almost zero ?? Give five reason? ?
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Why is each ion in the sodium chloride lattice six-coordinate?
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A substance is 27 % C and 73 % S. Which is the mass of carbon in 300. g of this substance?
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Ice table..?
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Back Titration (determining moles OH- and amount of Al(OH)3/Mg(OH)2)?
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Could someone please tell me the IUPAC name for these?
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What is the differnce between inter esterification and trans esterification?
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How would you draw the galvanic cell for the reaction:
Zn2+ + 4NH3 ---> [Zn(NH3)4]2+
Is this correct?
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What is the rate law for the reaction in terms of x, y, and z and the rate constant k?
Express the rate in terms of k, x, y, and z (e.g., kxy^3z^2).
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Please explain how can we differentiate beta and alpha-D-fructopyranose from beta and alpha-L-fructofuranose?? What is the difference in their ring structures?
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Draw condensed structural diagram or line diagram for:(select correct answer)?
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Draw condensed structural diagram or line diagram for:?
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