The chemical name "3,7-dimethylsanthin" belongs to: A. Caffeine B. Theobromine C. Euphyllin D. Theophylline

Q: Why is it that for o2 it is -x/2. Why is it divided by two

A:

Q: What is the best stereochemical designation for the major product of the following reaction?…

A: Alcohol gives dehydration reactions when they react with a strong acid like H2SO4 or H3PO4 to form…

Q: HOCH, 0-CH2 Но H. H OH OH H но CH2OH H H H H OH но H

A: ->Disaccharide form from condensation of monosaccharides .

Q: What

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Q: Consider the reaction 2CO2(g) + 5H2(g)C2H2(g) + 4H2O(g) Using the standard thermodynamic data in…

A: Given,  Chemical reaction,  2CO2(g) + 5H2(g) -------> C2H2(g) + 4H2O(g)  pressure of each gas is…

Q: What is the correct IUPAC name of the Alkyne structure below? 1-попупe 1-octyne 1-decyne 7-nonyne…

A: Note : As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Q: Label on a strong acid/strong base titration curve where pH=pKa. Is there a buffer region on a this…

A: Strong acid and strong bases dissociates Completely. So in this curve at end point neutralisation…

Q: What is E°cell (in V) for a redox reaction that has ΔrG° = 300 kJ mol-1 at 25°C ? Assume 2 electrons…

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Q: What is the correct IUPAC name of the structure below? CH,CH3 CH;CH,CHCHCH,CH,CH; ČH3…

A: Dear student since you have asked multiple questions but according to guidelines we will solve 1st…

Q: Calculate the Rf value of a spot if it travelled 1.5 cm while the solvent travelled 2.5 cm. Express…

A: Given :  1. Spot distance = 1.5 cm  2. Solvent distance = 2.5 cm

Q: Which of the following statement(s) is/are true regarding free energy? (Select all that apply.) A…

A:

Q: Determine whether each phrase describes carboxylic acids or esters. Usually have a sour odor…

A: Carboxylic acids are organic compounds with carboxyl functional group ( -COOH ). They have the…

Q: Give the basic building blocks of the following food gums: 1. Agar 2. Alginate 3. Carrageenan

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Q: Given below is a product-favored reaction? Select the correct cell notation for this reaction. 2…

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Q: Use standard thermodynamic data (in the Chemistry References) to calculate AG at 298.15 K for the…

A: Given,  Pressure of all gases 12.59 mmHg   2SO2(g) + O2(g) -------> 2SO3(g)

Q: 2)How many grams of solid ammonium chloride should be added to 2.00 L of a 0.203 M ammonia solution…

A:

Q: The decomposition of hydrogen iodide on a gold surface at 150 °C HI(g) ½ H2(g) + ½ I2(g) is zero…

A: Given-  HI(g)->1/2H2+1/2I2 K = 1.20 × 10-4M.s-1 initial concentration (a°) = 0.350 M Time (t) =…

Q: A piece of metal with a specific heat of 0.57 J g-1°C-1 at 1188 °C is dunked into a beaker…

A: Given,  Mass of water = Volume × density      = 369.7 × 1 = 369.7 g Heat capacity of metal(sm) =…

Q: Mendeleev's Periodic Table vs. the Modern Periodic Table Mendeleev's Periodic Similarities Modern…

A: Mendeleev's periodic table and Modern periodic table helps us to predict position of an element and…

Q: Suppose we titrate 20.0 mL of 0.100 M HCHO2 (Ka = 1.8 × 10–4) with 0.100 M NaOH. Calculate the pH.…

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Q: The carbocation intermediate formed in step 1 is resonance-stabilized. Drawa different resonance…

A: Resonance structure: If the Lewis structure of a molecule or ion cannot explain by a single…

Q: Cations move toward the cathode and anions move toward the anode. Group of answer choices True False

A: Anode is positively charged.  Cathode is negatively charged.

Q: a Calculate the pH of a solution that is 0.20 M HOCI and 0.88 M KOCI. Ka = 3.5x10-8 pH = 8.1 b In…

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Q: Use standard thermodynamic data (in the Chemistry References) to calculate AG at 298.15 K for the…

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Q: b Calculate PSCN if a cell consisting of a saturated calomel reference electrode ( E° = 0.244 V) and…

A: A the EMF of a cell which consists of calomel electrode and a silver indicator electrode is given to…

Q: An electrochemical cell is shown below with Zn in ZnCl2(aq) and Cu in Cu(NO3)2(aq), and  KNO3(aq)is…

A:

Q: Hi im still confused how you get the values from the grap

A: As per the given values of K and T, lnK is computed and then a graph is plotted between lnK vs 1/T

Q: Write the formula of the conjugate acid of the Brønsted-Lowry base, CIO

A: According to the Brønsted-Lowry concept :-  An acid is a proton donor  A base is a proton acceptor

Q: [CLO-2] Which of the following changes can influence all structres (primary, secondary etc) O pH…

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Q: How do you draw the chemical structure of the following? 1. 2′-fucosyllactose…

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Q: Write a balanced equation for the formation reaction of each of the following substances: (а)…

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Q: Consider the reaction of NO2  If 23.8L of O2(g), measured at 35oC and 632mmHg is allowed to react…

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Q: Concentration of hydrochloric acid (M) 2.05 Concentration of sodium hydroxide (M) 2.11 Calorimeter…

A: The data given is,

Q: Instructions: Backup your claims with scientific laws, postulates or theories. Answer in 3-5…

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Q: A mixture of benzene and ethylene chloride obeys Raoult’s law accurately. At 50oC, their vapor…

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Q: samples are introduced in a steady stream this introduces the sample in the form a of a fine spray…

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: A 50.00 mL of 0.0275 M HCl solution was titrated with 0.1500 M NaOH. Calculate the pH of the analyte…

A: Given,  Molarity of HCl = 0.0275 M  Volume of HCl in mL = 50.00 mL  Molarity of NaOH = 0.1500 M…

Q: Consider the reaction: 2 HI (g) = H2 (g) + l2 (g) Kc = 7.21 If at equilibrium the reaction vessel…

A: Kc = 7.21

Q: What effect does a colder temperature at a greater altitude have on an athlete's lungs and/or heart?

A: Atmospheric pressure decreases with increases in altitude. At high altitude there is less oxygen in…

Q: Given the following thermochemical equation: 4NH3(g) + 502(g) → 4NO(g) + 6H20(g) AH = -906 kJ…

A: Ammonia reacts with oxygen to form nitrogen oxide and water. The equation for the balanced chemical…

Q: What is the pH of a 1.3 X 10-4 molar solution of potassium hydroxide?

A: Given :- concentration of KOH solution = 1.3 × 10-4 M  To calculate :- pH of solution

Q: (a) Which is more likely to be paramagnetic, Fe(NO,)6 or Fe(OH)6 ? Fe(OH),+ O Fe(NO2)6* 4- (b) Why?…

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Q: Which of the diet sodas have the lowest concentration of aspartame? Which standard best reflects…

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Q: acid anhydride alcohol

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Q: What is the ΔHfus of ethanol (46.06 g/mol) which has Kb of 1.99 and freezes at -117.3 °C

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Q: What are [H3O+], [OH−], and pOH in a solution with a pH of 9.90?   [H3O+] = ____×10^__ M   [OH−] =…

A: Given data :

Q: What is the pH of a 1.0 L buffer made with 0.300 mol of HF (Ka =6.8 x 10-4) and 0.200 mol of NaF to…

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Q: What is the most proper name of this compound? ...CH CH3 O (S)-1,2-epoxy-2-methylpentane…

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Q: with the choices listed below, which sublevel is filled last?     choice 1- 3d choice 2- 4s…

A: The order of filling the electron in subshell is according to the energy.

Polymers

Polymers are naturally occurring or synthetically produced large molecules or compounds which are made up of series of repeating units called monomers. They are joined together by chemical bonds. The term polymer is coined from Greek roots meaning 'many parts' and are found almost everywhere from the plastics bags to the rubber of our tires to our DNA strands.