Air is 78.1% nitrogen, 20.9% oxygen, and 0.934% argon by moles. What is the density of air at 22 °C and 760 torr? Assume deal behavior. d = g/L

Q: Ibuprofen has the following mass percent composition: C75.69%,H8.80%,O15.51%   What is the…

A: The mass percent composition in Ibuprofen is  C75.69%, H8.80%, O15.51% The empirical formula of a…

Q: #6: Polystyrene (CAS# 9003-53-6) can be produced in 60°C toluene using a di-t-butylperoxide…

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Q: A compound is 40.0% C, 6.70% H, and 53.3% O by mass. Assume that we have a 100.-g sample of this…

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Q: 3. Sketch a free energy diagram for the reaction of each alkyl radical shown below with OH. Be sure…

A: Energy diagrams are used to represent the change in energy for the molecules involved in a chemical…

Q: F. Electron-Dot Formulas and Shape Formula 1. Electron- Dot 2. Number of 3. Electron- Formula…

A: we have to complete the table of electron dot formula and shape for the molecules  H2O SF2

Q: You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in…

A: Answer: Given data: mblood sample=11.3mg mFe=29.7μg Mass % of Heme=3.83%

Q: Н. НО Н H Br CH3 CH₂CHOHCH₂CH3 CH3 Roopang I

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Q: Part II: For each experiment, calculate the values of [BB-], [HBB] and [H+] to fill in the table…

A: Since concentration cannot be negative, in trial-A-2, [HBB] will be 4.2*10-5, and K = 3.27*10-8

Q: Calculate the percentage by mass of oxygen in morphine (C17H19N03). O None of the choices O 17 5.6 O…

A: Percentage by mass is calculated as shown below: = (mass of a component / Total mass of the…

Q: ofh too mees us faranos 240+ 200+ 160+ 120- KND CuSO, SH,0 10 20 30 40 50 60 70 80 90 100…

A: As per guidelines I am answering all questions of 1st part..... The explanation is given below-

Q: Three components in a mixture have varying distribution constants between the mobile phase and the…

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

Q: 1. For each of the following molecules: i) Draw the Lewis structure, showing non-bonding electron…

A: Hyberidization : is the hypothetical  concept of mixing of atomic orbitals of nearly same energy to…

Q: You are required to make a solution of the free base of cocaine, C17H21NO4. You dissolve 17.5 mg in…

A:

Q: 6 A5.301 g of sample of a mixture containing Mg50, 7H,O (MM-246.5) and NaCl (MM-58.44) yielded 3.784…

A: Answer: In this question we have to covert the mass of water into mass of MgSO4.7H2O.

Q: student forgets to sand the magnesium metal before the experiment . would his percent yield be…

A: The atomic number of magnesium metal is 12. It belongs to 's' block element. It is  denoted by the…

Q: CHT RI

A: Note: According to our guidelines we are supposed to answer only one question with first three…

Q: Now draw two waves on your own sheet of paper. Predict what would happen if they arrive at the same…

A: The explanation is given below-

Q: the decomposition of dinitrogen pentoxide is described by the chemical equation: 2N2O5 (g) --> 4…

A: Given rate of apperance  of  O2 = 3 .00 mol/min Rate of disappearance of N205 = ?

Q: b what is the normal boiling point of each compound? 0 16 25 48 67 81 102 800 CS₂: CH3 NO₂: 0 °C -10…

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Q: Draw the structural formulas for biphenyl and Para-nitroanine indicate what they are by namong them.…

A: Lewis base: The chemical species which donates lone pair electrons is considered as Lewis base. An…

Q: Hydrogen peroxide, H₂O₂ (aq), decomposes to H₂0 (1) and O₂ (g) in a reaction that is first order in…

A: Given: The decomposition of H2O2 is first order in H2O2. Rate constant, k = 1.06 × 10-3 min-1 We…

Q: The pH of baking soda is above 7 and it is acidic below 7 and it is acidic below 7 and it is basic…

A: Since, pH value measure the acidity or basicity of the solution or compound. If pH > 7 then…

Q: #8: A molecular weight distribution for a batch of poly(butyl acrylate) (CAS# 9003-49-0) is shown in…

A:

Q: Question 12 of 17 If you have 155 mL solution of a 0.762 M FeCl, solution, how many moles of FeCl,…

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Q: At 1 atm, how much energy is required to heat 57.0 g of H₂O(s) at -12.0°C to H₂O(g) at 175.0°C?…

A: To calculate the total energy required to heat water from - 12.0°C to 175.0°C , there are different…

Q: The rate constant for this first-order reaction is 0.400 s¹ at 400 °C. A-products How long, in…

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Q: If the ?a of a monoprotic weak acid is 7.8×10^−6, what is the pH of a 0.12 M solution of this acid

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Q: Propose a molecular formula for a compound that exhibits the following peaks in its mass spectrum…

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Q: The refrigerant 1.1.1.2-tetrafluoroethane has been used in air conditioners in cars since the…

A: Skeletal structure is also called a bond line structure. In this structure, carbon carbon bonds are…

Q: D Question 2 Which of the following is a strong acid? a. HNO₂ b. HCIO2 C. HBrO d. HCIO3 e. H₂SO3 O a…

A: Given acids: HNO2 HClO2 HBrO HClO3 H2SO3 We have to find a strong acid among them.

Q: If the initial partial pressure of HI is 0.171 atm, what is the equilibrium partial pressure for HI?…

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Q: 4.1 Name the compound shown below. Br Find the parent. Label a carbon bearing a substituent as C-1…

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Q: As a pathologist, you run an assay and find an abnormally high level of EPO. What cells types will…

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Q: 4. A 100-ml buffer solution with pH of 4.80 is prepared as a stock solution. Using this stock buffer…

A: a. Yes all have same pH. As all three solutions are prepared by diluting same stock buffer solution…

Q: . The decomposition of SO₂Cl₂ is a first-order reaction, S₂OCL2 (g) --------> SO₂ (g) + Cl₂ (g). The…

A:

Q: Complete the equations for the given equilibria, and calculate Keq where the Keq expression includes…

A: Given,  species pKa NH3 35 NH4+ 9.25 species pKa H2O 15.74 H3O+ -1.74

Q: d. All of the above. 4. What is a vinegar solution? a. a strong acid b. a weak acid c. a strong base…

A: -> Vinegar is a chemical compound with the chemical formula CH3COOH .It is also called ethanoic…

Q: for each of the molecules below, indicate the pH range where the molecule would be ionized. H As In…

A: The ph range depends upon the    group present  in the molecule .

Q: The equilibrium constant, K, for the following reaction is 13.5 at 337 K. 2CH₂Cl₂(g) CH4(9) +…

A: We have given a reaction and value of Kc of this reaction at a particular temperature. We have to…

Q: Propose a molecular formula for a compound that exhibits the following peaks in its mass spectrum A:…

A: Given :

Q: Create a Venn Diagram (or a table) that compares and contrasts ionic and covalent bonds. Be sure to…

A: Ionic bond is formed by gain or loss of electrons while a covalent bond is formed by sharing of…

Q: CI CO₂H

A:

Q: The length of a stearic acid moleucle can be estimated using the data obtained in this experiment…

A: To calculate the length of stearic acid molecule, given the concentration of stearic acid solution…

Q: 12. Calculate the activity coefficient and activity of bromide in 500 mL of a solution that has…

A: #12: We can find the activity coefficient(γ) of an ion using the extended Debye-Huckel equation…

Q: #7: Draw/sketch representative structures for (a) homopolymers, (b) alternating copolymers, (c)…

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Q: A sugar crystal contains 1.8 * 1017 sucrose ( C12H22O11) molecules. What is the mass in mg?

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Q: Compare the boiling points of the various isomeric hydrocarbons shown in the table below. Notice the…

A: The boiling point of an alkane depends on the surface area of the molecule. So, higher the surface…

Q: HO fraction mass (g) M (kg/mol) 1 1.15 12.5 1 OH 2 0.73 20.5 HO 3 0.925 32.3 4 0.69 38.5 5 1.88 62.4…

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Q: A 0.921 g sample of an unknown organic compound containing C, H, and O was burned in air to give…

A: Given: Mass of the organic compound = 0.921 g Mass of CO2 = 4.37 g Mass of H2O = 2.24 g Known: Molar…

Q: Need help with my lab please! I used 500uL, 650uL, 800 uL and 900uL using 2.519x10^-2M KBr in a…

A: In the given experiment total amount of KBr used is the sum of the various amounts added in the…

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.