O Molecula

Q: What is the density of nitrogen gas at STP? a) 0.624 g/L b) 0.800 g/L c) 1.14 g/L d) 1.24 g/L

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Q: What is enriching Uranium? Why is uranium-235 used instead of the more common isotope uranium-238?

A: Uranium(U) is a silvery-white metallic with the atomic number 92.

Q: d e Look at Groups 1, 2, and 3 on the periodic table. What do the most common ion charges for all of…

A: Group 1,2 and 3 have 6 elements each.

Q: Select all of the correct statements about equilibrium from the choices below. At equilibrium the…

A: Reaction equilibrium : It is the state where in the two opposing reactions(forward and backward…

Q: resonance

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Q: i + l CHINH, NH3 CH room temp ½₂ HOO Ю H J + K H (h) (f)

A: These reaction can be explained as:

Q: Select all of the correct statements about reaction rates from the choices below. The lower the…

A: The Answer to the following question is- 1.correct 2. correct 3. correct 4. false 5. correct 6.…

Q: 1A H2A Li Be Na Mg 38 48 58 68 78 98 K Ca Sc Ti V Cr Mn Fe Co Ni Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd…

A: There are 7 periods and 18 groups in the periodic table.  there are 4 division which are s block, p…

Q: [Review Topics] [References] Calculate the [OH] of each of the following solutions at 25°C. Identify…

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Q: Chemistry 1. Calculate the pressure of non ideal gas of one moles of H2 (g) in the flask with the…

A: Since you have asked multiple question, as per our company guidelines we are supposed to answer…

Q: 25 g of a solid is cooled at constant pressure by removing 1200 J of heat from 290 K to 275 K.…

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Q: What is the pH of a solution which is 0.1396 M in C 5H 5NH 2 and 0.1345 M in C 5H 5NH 3Br?…

A: Note- Since the given question is a multiple question hence I solved first question according to…

Q: Select the single best answer. At 425°C, K₂-4.18 x 10 for the reaction 2 HBr(e) H₂(g) + Bry(g) In…

A: The given equilibrium reaction is             2 HBr(g)  ⇌H2(g) + Br2(g), Kp = 4.18×10-9 at 425 0C

Q: The half-life of a radioactive material is 42.99 minutes. Starting with 875.5 grams of the sample,…

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Q: Wrong answers

A: LeChatelier's principle: When factors like concentration, pressure, temperature, inert gases that…

Q: A chemistry graduate student is given 300. mL of a 1.50M pyridine (C,H,N) solution. Pyridine is a…

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Q: In the laboratory, a general chemistry student measured the pH of a 0.590 M aqueous solution of…

A: we have to calculate the value of Kb for methylamine

Q: By what factor does [H+] change for a pH change of 2.42 units

A: [H+] change = ? pH change = 2.42 units

Q: 100 g of liquid benzene at 298 K is isothermally and reversibly compressed from 1 atm to 4 kbar.…

A: Given data: Pi=1 atmPf=4 kbar×1 atm0.00101325 kbar     =3.947×103 atm m=100 gρ=0.879 g/cm3T=298…

Q: Is the following statement true or false? If you think the statement is false, rewrite it to make it…

A: The given statement is-  A laser light is a device that produces intense beam of light of a single…

Q: When SO₂(g) reacts with O₂(g) according to the following reaction, 98.9 kJ of energy are evolved for…

A: When the heat is evolved in the reaction, then it is called as exothermic reaction.  the sign of…

Q: When electrodes connected to a lightbulb are inserted into an aqueous solution of acetic acid, the…

A: In metals, electric current flows through mobile electrons present in that, where as in solution,…

Q: (NH4)2S is a soluble compound True False

A: Yes , the (NH4)2S is a soluble compund. Hence the statement is True.

Q: HClO is a weak acid (?a=4.0×10−8) and so the salt NaClO acts as a weak base. What is the pH of a…

A: Ka is the dissociation constant of the acid.

Q: Using standard heats of formation, calculate the standard enthalpy change for the following…

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Q: Green light has a wavelength of 5.2 x 10² nm. a What is the energy, in joules, of one photon of…

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Q: Consider the multiplicity of the 1¹H NMR peak shown below. Identify how many hydrogens are on the…

A: Multiplicity of a peak corresponding to a hydrogen in 1H NMR spectroscopy is used to determine how…

Q: Which of the following describes the element Br? Choose all that apply. Oreacts vigorously with…

A: Answer  Bromine (Br2) is non - metal element and belongs to group 17 and 4…

Q: Find the km for an Michaelis-Menten kinetics enzyme. This enzyme is at 90% maximal velocity and 65mM…

A: Given the substrate concentration, [S] = 65 mM  V = 90% of maximal velocity, Vmax ⇒v = 90100xVmax⇒v…

Q: III. It is known that the solvolysis of 2-bromo-2-methylbutane in ethanol at 25 produces a mixture…

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Q: CH3CO₂K THF 0 99+ Please select a dr G

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Q: 2.67 g of pure acenapthene (AN) is completed dissolved in 15.1 mL of hot ethanol at 70∘C. If this…

A: 2.67 g of pure AN is completed dissolved in 15.1 mL of hot ethanol at 70 °C. If this hot solution is…

Q: Provide the correct IUPAC name for the compound shown here. Ọ CH, CH,CH, I H₂C-C-C-CH-CH₂-CH3 I…

A: IUPAC RULE- 1-For writing name of the structure, we keep mind that longest chain of carbon.…

Q: In the laboratory, a general chemistry student measured the pH of a 0.589 M aqueous solution of…

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Q: What is the IUPAC name for the molecule shown below? CI O (4R,5Z)-4-chlorohept-5-en-2-yne…

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Q: Complete the equation for the ionization of water by drawing the conjugate acid and conjugate base.…

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Q: 8. Calculate Eº, E, and AG for the following cell reactions: (a) Mg(s) + Sn²+ (aq) → Mg²+(aq) +…

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Q: Using the smallest whole-number coefficients, what is the sum of coefficients for the balanced…

A: we have to write the balanced equation and determine sum of coefficients in balanced equation

Q: For main group elements, how does the number of core electrons vary across a period?

A: Period table contains 7 Period and 18 groups.  From left to right across the periodic table is known…

Q: Question 1 If an octahedral iron(II) complex is paramagnetic, which of the following sets of…

A: Given: An octahedral iron (II) complex is paramagnetic. We have to find the correct condition to…

Q: In a coffee cup calorimeter with a heat capacity of 21.5 J/ºC, 225 mL of 0.20 M KOH at 22.3 ºC…

A: Given :  Volume of KOH = 225 ml Concentration of KOH = 0.20 M  Volume of HCl = 225 ml Concentration…

Q: Consider the reaction given below. H2(g) + F2(g)  2 HF(g) (a) Using thermodynamic data from the…

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Q: When titrating 225 mL of 0.245 mol/L nitric acid HNO3 with 0.205 mol/L KOH. What is the pH of the…

A: We know that , Concentration= (no of mole/ volume)

Q: One question with three parts

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Q: 6. Please provide the correct IUPAC names for the following compounds, including the correct…

A: Dear student, we are authorised to solve only one question at a time. Please post rest of the…

Q: Calculate [OH -]  (a) 0.0849 g of RbOH in 490.0 mL of solution [OH -] =______   M   (b) 63.7 mL…

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Q: Br Strong Base Please select a drawing or reagent from the question area

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Q: Phosphoric acid, H₂PO4 (aq), is a triprotic acid, meaning that one molecule of the acid has three…

A: H3PO4 is a tribasic acid. So it can liberates 3 moles of H+. According to question PKa1=2.16…

Q: Draw the structure of an eight-carbon alkene that would yield the following compound (and no others)…

A: Given compound: We have to find the structure of the alkene that would yield this compound after…

Q: Consider the reaction. heat 2 Al(s) + Fe₂O3(s) Al₂O3(s) + 2 Fe(1) If 25.1 kg Al reacts with an…

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