Which of the elements below are not commonly found in living things? Group of answer choices oxygen lead sulfer carbon

Q: What is the mole fraction of hydrogen chloride in hydrochloric acid which contains 36% HCl by mass? ...

A: Given, % by mass HCl = 36 % Mole fraction of hydrochloric acid (HCl) in the hydrochloric acid soluti...

Q: What is the concentration of K+ ions in a 0.045 M K2CO3 solution assuming complete dissociation? Ex...

A: Given: Concentration of K2CO3 = 0.045 M  

Q: Which of the following is less soluble in water, ethanol (C2H5OH) or BaSO4.

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Q: Millon’s test: Put 5 drops of Millon’s reagent to phenol. Notice the color formed. What is the mol...

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Q: Suggest the following transformation: i. Synthesis of 1,2-diphenylethanol using only benzene as the ...

A: For converting benzene to 1,2-diphenylethanol  the reaction is as follows

Q: Identify each of the following groups as an activator or deactivator and as an o,p-director or m-dir...

A: Given : We have to explain whether the gives groups are activator or deactivator.

Q: Intensive (2) extensive

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Q: 1. The concentration of an unknown weak acid solution is 0.25M, and the solution has a pH of 3.98. W...

A: Concentration of weak acid = 0.25M pH = 3.98  [H+] = 10-pH  = 10-3.98

Q: Draw the major product(s) of the following reaction. H3C, CH3 KMNO4 H20 ČH2CH3 • You do not have to ...

A: The alkyl group attached with the benzene ring having at least one hydrogen atom at the key atom can...

Q: What is the molecular weight and empirical weight of butyric acid, the acid that is present in butte...

A: Standard data: The atomic mass of hydrogen = 1.008 u The atomic mass of carbon = 12.01 u The atomic...

Q: Suppose a 250. mL flask is filled with 1.8 mol of H,O, 0.30 mol of CO and 0.10 mol of H,. This react...

A: The solution is as follows:  

Q: The table below shows three organic compounds with their relative molecular masses listed. Chemical...

A:     Compound Molecular mass Boiling point A CH3CH2CH2CH2CH3 72 36 B CH3CH2OCH2CH3 74 X C CH...

Q: How many L of barium sulfate (BaSO4) will be produces from a raection of 32mL of 0.310M barium nitra...

A: Given data :-  Molarity of barium nitrate = 0.310 M Volume of barium nitrate = 32 mL Molarity of alu...

Q: 3. According to the Evan's pKa table, phenol has a pka of 9.95. p-Nitro and m-nitrophenol have pKas ...

A: Ka is the acid dissociation constant. pKa is defined as the negative logarithm to base 10 of Ka. Hig...

Q: f. 2,3-dimethyl-4-propyloctane g. 1,3,5-trimethylcyclohexane h. cis-1,2-dipropylcyclopentane i. 2-br...

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Q: (a) The quantum number n describes the. * an atomic orbital and the quantum number e describes its o...

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Q: For each of the following reactions, indicate whether you would expect the entropy change of each of...

A: Entropy is the measure of randomness. With the decrease in intermolecular interaction, randomness in...

Q: Balance chemIcal eojuasias NO + H20 2)_ Nig Og + Fe. Ni COH)2+ Fe COH72

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Q: calculate the Zeff of the outermost valence electron of S

A: The element given is S.  

Q: Consider the gas-phase reaction, 2 SO2 + O2 ⇄ 2 SO3, for which Kp = 2.0 at a given temperature. If t...

A: The equilibrium reaction given is, => 2 SO2 + O2 ⇄ 2 SO3  Given: Kp of the reaction = 2.0 Pressur...

Q: Explain the relationship between intermolecular forces, vapor pressure, and boiling point.

A: The relationship between intermolecular forces, vapour pressure and boiling point is given below.

Q: Indicate the position of equilibrium for reactions a) 2 b) H-o NH NH 'N' OH 6. OH 5

A: Equilibrium lies towards the chemical specie that is more stable. Stability can depend on various fa...

Q: List combination of quantum numbers (n, l, ml) that could describe the size, shape, and orientation ...

A: The answer is as follows:  

Q: An alloy has an elastic modulus of 115 GPa. For the alloy, plastic deformation begins at a stress of...

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Q: [4] The reaction: 21 (aq) + S2O;²-(aq) → I½(aq) + 2SO,²-(aq) is first order with respect to I and fi...

A: Given: The equation of the straight line for ln K v/s 1/T is y = -5781.8 x + 14.1 

Q: 100) 20 gm of binary electrolyte (mol. wt. = was dissolved in 500 gm water. Freezing point of soluti...

A: The degree of dissociation of electrolyte is given below

Q: /hich of the following is NOT a step in the mechanism of the given reaction sequence? 1. LIAIH4 OMe ...

A: We have to predict the option not included in the mechanism for given reaction.  

Q: Write the letter of the pair of compounds that illustrates the given isomerism. CH CH CH HạN H3C CH ...

A: This question is related to isomerism. Isomers are molecules having the same molecular formula, but ...

Q: d) increasing the pressure in the reaction vessel e) decreasing the temperature of the system

A: For the preparation of Ammonia the haber process is scientifically used and is given by when one of ...

Q: formula units

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Q: Why is it importance to understand the difference of an acid and base solution? What benefits does i...

A: Given : We have to tell why there is need to understand the difference between acid and base.

Q: The initial concentration of aqueous hydrogen peroxide, H 2O 2, was 0.1463 M; after decomposition fo...

A: The balanced reaction given is, => 2 H2O2 (aq) → 2 H2O (l) + O2 (g)  Given: Initial concentration...

Q: Calculate the percent ionization of a 0.20 M formic acid solution. K = 1.7 ×104 (Set up an equilibri...

A: Below attached file showing the details answer. All the best.

Q: 3. Synthesis as part of your synthesis. You may use any other reagents necessary. Design a synthetic...

A: The reaction is as follows:  

Q: 1,3,3-trichloro-2-methyl- pentane 4-bromo-1-tert-butyl- cyclohexane

A:

Q: Calculate the pH of 0.606 M anilinium hydrochloride (C6H5NH3Cl) solution in water, given that Kb for...

A: pH of C6H5NH3Cl = to be calculated  Concentration of aniliniun hydrochloride = 0.606M Kb for aniline...

Q: A piston/cylinder setup contains 1 kg of air at 20°C with an initial volume of V1=0.1 m3, as shown i...

A:

Q: An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu...

A: Given  natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abudance with ...

Q: 20. Which is the most polar bond? (а) С-С (b) С-Н (c) N-H (d) О-н (e) Se-H

A: Relationship between polarity of bond and electronegativity difference (∆EN) Polarity of bond can be...

Q: Which of the following is an INCORRECT interpretation of the balanced equation shown below? 2S(.) + ...

A: The incorrect interpretation about the balanced equation is given below 

Q: Refer to the number ndnds (2 and Use the drop-down features to describe the two curved arrows that s...

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Q: A piece of aluminum with a mass of 30 grams was heated in a steam jacket to 98oC and then plunged in...

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Q: Ozone decomposes to form oxygen molecules and oxygen atoms, O3(g) → O2(g) + O(g), in the upper atmos...

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Q: Enter your answer in the provided box. What is the boiling point of 0.800 m lactose in water? (K, fo...

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Iridium (Ir) has a face-centered cubic unit cell with an edge length of 383.3 pm. Calculate the dens...

A: Given: Edge length of the unit cell = 383.3 pm = 383.3 × 10-10 cm.                       (Since 1 pm...

Q: Silver nitrate is added to a solution of 1 x 10-2 M sodium acetate (Ksp AgC2H3O2 = 1.9 x 10-3): a) ...

A: Concentration of acetate ion = 1 x 10-2 M sodium acetate Ksp AgC2H3O2 = 1.9 x 10-3

Q: If you dilute 200 ml of a 1.5M solution of LiCl to 1.5 liter. Determine the new concentration of the...

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Q: In a calorimeter experiment, NaOH and HNO3 underwent a neutralization reaction and produced 0.075mol...

A: Neutralization reactions are generally exothermic and thus ΔH is negative. 

Q: Give the IUPAC name of the compound below.

A: The IUPAC name of the compound can be written on the basis of the main carbon chain, functional grou...

Q: 50. In order to prepare 100 ml HCI what 25 HCI and 20 volume of -HCI should be 30 mixed respectively...

A: Final volume = 100mL Final normality = N/ 25     

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.