R- CI

Q: Given the only naturally occurring isotope of phosphorus is P-31, determine its mass from the period...

A: The mass of phosphorus-31 from the periodic table.

Q: Calculate the masses and moles of solute present in the following aqueous solutions: a.) 350 cm3 of ...

A: A) Given that, Volume of 32% m/m KCl = 350 cm3  = 350 mL Density of KCl solution = 1.17 g/mL Mass of...

Q: Show work

A:

Q: Identify two forms of energy that are involved in each of the following energy conversions relating ...

A: Energy can neither be created nor destroyed. They can only be converted from one form to another.  

Q: Please answer questions A through C I could not read the handwriting last time so please make sure I...

A: Stereochemistry is a branch of chemistry that deals with the arrangement of atoms in the space aroun...

Q: Two 25.0-mL samples, one 0.100 M HCl and the other 0.100 M HF, are titrated with 0.200 M KOH. a. Wha...

A:   Titration is done by taking “acid in the conical flask and base in the burette”. Titration is usua...

Q: Calculate the percent ionization of nitrous acid in a solution that is 0.222 M (HNO 2) in nitrous ac...

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Q: Lemons get their sour flavor from citric acid (Ka = 7.4 x 10-4) a fresh squeezed lemon can have a ci...

A: The pH scale is given by the scientist Sorensen in order to express the [H3O+] ion of a solution. It...

Q: What are the functional groups present in each compound?

A: The functional groups present in the compound has to be given.

Q: What are the functional groups present in each compound?

A: Functional group is the specific group of atoms or bonds in the organic compounds.  Functional group...

Q: For the galvanic (voltaic) cell Fe(s) + Mn² (aq) Fe2 (aq) + Mn(s) (E° :0.77 V at 25°C), what is [Fe2...

A: Concentration of Fe2+ ion is .039 M

Q: I need  help on part B, it would be appreciated if explained!

A: We know that  Bond enthalpy describes the amount of energy stored in a bond between atoms in a molec...

Q: The rate constant for this first-order reaction is 0.600s ^ - 1 at 400 degrees * C . A longrightarro...

A: Given: Rate constant=0.600s-1 Temperature=400°C Initial concentration=0.890 M Final concentration=0....

Q: help

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Q: using the structure below label the aromatic, amine, and carboxylate salt

A: The benzene and its derivative are aromatic compounds. The amine functional group contains an sp3 hy...

Q: A radioactive sample contains 1.55 g of an isotope with a halflife of 3.8 days. What mass of the iso...

A: Given details, t1/2 = 3.8 days t = 5.5 days m0 = 1.55 g To calculate the mass of the isotope. By usi...

Q: Which diagram best represents the result when equal volumes of equal-concentration aqueous solutions...

A: Given :  Which diagram best represents the result when equal volumes of equal-concentration aqueous ...

Q: Concentrated solutions have__ amount of solute O lower O higher O normal abnormal

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Q: Question 3 of 12 Determine E° for a galvanic (voltaic) cell if AG° = -6.8 kJ/mol and n = 3. (F = 96,...

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Q: Consider the following reaction. 2 NO, (g) = N,0,(g) When the system is at equilibrium, it contains ...

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Q: 217 mL of neon gas at 551 °C is brought to standard temperature (0 °C) while the pressure is held co...

A: Given that pressure and number of moles of gas is constant So T/V will remain constant. Given initia...

Q: A 982.9 ng sample of an unknown radioactive substance was placed in storage and its mass measured pe...

A: As we know that decay of radioactive substance follows first order kinetics

Q: Encircle and identify all functional groups in each compound.

A: A functional group is an entity or a substituent that is attached to a basic molecule that results i...

Q: 11. Using Table 8.4 a. Estimate AH for the following gas phase reaction H-O-O-H + 2 C=O→ H-H + 2 O=C...

A: The enthalpy change of a reaction is the amount of energy absorbed or released in a reaction. The en...

Q: You want to analyze a silver nitrate solution. (a). HCl Analysis. You could add HCl(aq) to the solut...

A: A) HCl analysis; Given that,  Volume of 0.170 M AgNO3 solution = 13.0 mL = 0.013 L Moles of AgNO3  i...

Q: help

A: If heat flows into the system from the surroundings, Delta S of the surroundings is less than zero.

Q: You wish to prepare an HC 2H 3O 2 buffer with a pH of 4.14. If the pK a of is 4.74, what ratio of C ...

A: pH = pKa + log[salt]/[acid]

Q: What is the point at which gas and liquid are indistinguishable from each other? A. Critical point B...

A: In physical chemistry, a phase diagram chart show that at particular conditions (pressure, temperatu...

Q: A 74.8 g sample of copper at 143.2 ∘C is added to an insulated vessel containing 165 mL of mercury H...

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Q: Lic

A: Flame test is a qualitative determination of elements. When atoms are heated, electrons move from gr...

Q: Define the term lattice energy?

A: Energy evolved when one mole of ionic compound is formed from isolated gaseous ions is known as latt...

Q: 3.113 An iron bar weighed 664 g. After the bar had been standing in moist air for a month, exactly o...

A: The final mass of the iron bar and rust has to be given, The mass of iron after one-eighth of the ba...

Q: What is the temperature of a sample of gas that has 4.5 moles in 40,550 mL at a pressure of 500 mm H...

A: The question is based on ideal gas equation. We have to calculate temperature of the gas whose press...

Q: Given the only naturally occurring isotope of aluminum is Al-27, determine its mass from the periodi...

A: Isotopes of an element are the ones which have the same atomic number but different mass number. Ato...

Q: help

A: The correct statements are:

Q: The mole is a unit that counts things and it can be converted into

A: Mole is the unit of the amount used extensively in the calculation of chemistry. The mole amount of ...

Q: Which reaction occurs at the anode of a lead storage battery? a) Zn(s) + 2 OH (ag) Zn(OH):(s) + 2e b...

A: The lead storage battery is a rechargeable electric battery (a secondary battery) also called a lead...

Q: Would you expect the substituent    N+(CH3)3 to more closely resemble   N..(CH3)2 or-NO2  in its eff...

A: The resemblance of N(CH3)2 or-NO2 with N+(CH3)3 based to the rate effect and regioselectivity in the...

Q: 9. What are the bond angles marked a, b, and c in the molecule below. (Figure NOT drawn to scale) HO...

A: Applying concept of hybridization in organic compounds.

Q: Encircle and identify all functional groups in each compound.

A: Functional group is the specific group of atoms or bonds in the organic compounds. Functional groups...

Q: Question 5 of 12 What is the equilibrium constant K at 25°C for an electrochemical cell when E° = +0...

A: Given deta is  E0 = 0.0125 V  n= 2 F = 96500 J/(V.mol)  R= 8.314J/ ( mol.K)  T = 250C = 25+273= 298K...

Q: determine the identity of 0.703g of a gas that occupies 596 mL at 0.483 atm and 16.9 °cXeC3H8C4H10Ar...

A: Given: Mass of gas=0.703g. The volume of a gas is 596 mL The pressure and temperature are 0.483 atm ...

Q: What ratio of NaCN to HCN is needed to prepare a pH 10.00 buffer? (Ka of HCN is 4.9 x 10 10)

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Q: Calculate internal energy from heat and work and state the signconventions of these quantities?

A: First law of thermodynamics: According to first law of thermodynamics, total internal energy of syst...

Q: Correct this and please write clearly with abbreviations

A: In a balanced reaction the number of each atom is same in reactant side with that of the product sid...

Q: A toluene solution (1.50 mg / L) shows an absorbance of 0.30 in a cuvette with a 0.025 mm optical pa...

A: Given concentration of Toluene = C1= 1.50 mg/L = 1.50 ppm Absorbance ( A1) = 0.30 Cuvette length = L...

Q: In the isoelectronic series Ca2 + , Cs+, Y3 + , which ion islargest?

A: In the isoelectronic series Ca2'+ , Cs+ , Y3+ which ion is largest has to be given.

Q: How many moles of HCl need to be added to 200.0 mL of a 0.200 M solution of NaF to make a buffer wit...

A: Mole is the amount of the substance that contains the same number of particles or atoms or molecules...

Q: The Haber process is very important for agriculture because it converts N2(g) from the atmosphere in...

A: Haber's process involves the manufacture of ammonia. Plants can easily take up nitrogen from ammonia...

Q: Draw the resonance contributors for the sigma complex’s formed(right).

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Aromatic Compounds

Aromatic organic compound or aromatic system is an important class of hydrocarbons under the branch of organic chemistry. Aromatic compounds are also called arenas. The definition of aromatic organic compounds can be stated as a class of organic compounds with a planar cyclic ring of atoms bonded through alternated single and double bonds. Due to these alternating bonds, a peculiar feature termed as ‘resonance’, that is, delocalization of pi electrons or the electrons is shared within the atoms of the ring which are present in the aromatic compounds. The word ‘aromatic’ includes a Greek word ‘aroma’ which means smell, indicating that they were named as such due to the sweet odor they produce. Many well-known flavors such as vanilla, cinnamon, and few scents from flowers are extracted from aromatic compounds. Benzene with chemical formula C6H6 is a very common aromatic compound that contains six atoms of carbon held in the cyclic ring of alternate double bonds. It is also to be noted that not all aromatic compounds contain benzene ring. This can be explained by Huckel’s rule.