Argon is enclosed in a 4.00 L rigid vessel at 0.950 atm and 20 °C. Calculate the volume of oxygen measured at 715 torr and 30 °C required to prepare a mixture with the argon for which the mole of oxygen is 0.250.

Q: Which of the following reactions corresponds to the standard enthalpy of formation of methane, CHA?…

A: The standard enthalpy of formation : when 1 mole of substance is produced form its constituent…

Q: Which element would have the lowest ionization energy?       S, Ge, Al, Ca, Rb   2.) Which…

A: Given : 1) elements  Tip : ionization energy decreases on moving top to bottom and ionization energy…

Q: calculate the percent ionization of nitrous acid in a solution that is 0.249M in nitrous acid. the…

A: [HNO2] = 0.249 M Ka = 4.50 x 10-4

Q: How much energy is required to heat 45.0 g H2O from a liquid at 70.0°C to a gas at 115°C? Also,…

A:

Q: C₂H3O2/HC₂H3O2 H₂SO3/HSO, NH/NH3 H₂O+/OH- All of the above are conjugate acid-base pairs. рап

A: Answer: Acid is a compound that can donate H+ ion in the solution and specie that forms after the…

Q: Draw the electron pushing mechanism

A:

Q: What is the sugar classified as - ketopentose - aldohexose - aldopentose - ketohexose

A: ketopentose - sugar contains five carbons with ketone functional group.  ketohexose sugar contains…

Q: 1. Calculate the concentration of [N2O4] at equilibrium when the [N2] = 1.08 x 10-³M and [02] is…

A: we have to calculate the equilibrium concentration of  N2O4 N2 O2

Q: What effect will increasing the temperature have on the system? C3H8(g) +5O₂(g) ⇒ 3CO₂(g) + 4H₂O(1)…

A: Given: Reaction is  C3H8(g) + 5 O2(g) ⇌ 3 CO2(g) + 4 H2O(l)      ΔH° = -2220 kJ  We have to find the…

Q: 1. Provide plausible arrow pushing mechanisms for the following reactions. (a) OH ОН ...J Me ê Br Br…

A: to get the product (a); the following reactions takes place (1)One of the most popular sigmatropic…

Q: A rigid metal container located near a furnace contains 42 L of Nitrogen at 15 °C and 4 atm. When…

A:

Q: A certain shade of blue has a frequency of 7.08 x 10¹4 Hz. What is the energy of exactly one photon…

A: Given : frequency = 7.08 × 1014 Hz  Tip : energy = h × frequency

Q: Given the following thermochemical equations: 2 OF2 (g) → 02 (g) + 2 F2 (g) 2 CIF (g) + O2 (g) →…

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Q: Given the following thermochemical equations: 02 (8)+2 F2 (g) 2 OF2 (g) Cl₂0 (g) + 3/2 OF2 (g) -…

A: Answer:- This question is answered by using the simple concept of Hess law of constant Heat…

Q: Write the Molar S Mass? s?

A: Steps to find molecular formula  To find the molecular mass we should know the chemical formula of…

Q: Acidic K₂CO3 Rbl Basic NH,CIO C₂H₂NH,Br Fe(NO3)3 pH-neutral

A: Neutral Salt : When strong acid and strong base is neutralized in the reaction. Acidic Salt : When…

Q: How many unpaired electrons are found in a ground state atom of Os?

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Q: How much heat (in kilojoules) is needed to warm 2.0 grams of water from -10 to 40? Here are some…

A:

Q: Which one of the following statements is true? Select all that apply. A. An electrolytic cell does…

A: In an electrochemical cell, the chemical energy is converted into electrical energy and in an…

Q: Stork enamine reactions - Write the mechanism to predict the product of reaction of acetone wi…

A:

Q: What is the relationship of the following molecules: 1.Enantiomers 2.Diastomers 3. Identical 4

A: According to Cahn-Ingold-Prelog rule- 1) More atomic number having more priority.2) If first atom is…

Q: Give an IUPAC name for the following alkyl halides. wireframe (abels wireframe labels (It is not…

A: Guideline message: In case of multiple questions, only first question is answered if not specified.…

Q: Show calculations for x and y: (Include appropriate units, attach a separate sheet if necessary) y =…

A: Rate = k [I-]x [H2O2]y k: Rate Constant x,y: Order

Q: How many moles of N2O are represented by 8.55 g of N2O The atomic mass of Nitrogen is 14.01amu and…

A: Given  Atomic  mass of Nitrogen (N)  = 14.01 amu Atomic mass of oxygen (O) = 16. 00 amu Mass of N2O…

Q: A 25.0 mL aliquot of 0.0480 M EDTA was added to a 50.0 mL solution containing an unknown…

A: EDTA forms complex with ions in 1 : 1 mole ratio. So first we would write the reactions.  Then we…

Q: Q.) What is the pH of an aqueous solution containing 0.50 M NH3 and 0.45 M NHẠCI? Kb = 1.78 × 10-5…

A:

Q: Determine whether each of the molecules below is polar or nonpolar.

A: Given : formula of compounds Tip : first draw the shape

Q: A CHEM 1151K student notices that it takes 20.0 mL of a 1.5 M solution of KOH to completely…

A: Answer:- This question is answered by using the simple concept of stoichiometry which involves the…

Q: Solid water as a pure substance Liquid vapor

A: Water(H2O) exists in three phases as solid(ice), liquid and vapor. A solid has a definite volume and…

Q: Recall: compound X has the molecular formula C8H₁5OCI, a peak at 1800 cm¹ in its IR spectrum, and 6…

A: Molecular formula C8H15ClO

Q: in which of the following reactions will Kc =Kp

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Q: A ground state hydrogen atom absorbs a photon of light having a wavelength of 93.73 nm. It then…

A:

Q: In each group below, which has the least polar bonds? SiCl4, PCI3, SC1₂ NCI3, PCI3, AsCl3

A: Given : formula of compounds Tip : less difference of electronegativity between atoms will have…

Q: State whether each of the following atomic orbital combinations will result in a sigma (σ), pi (π),…

A: By default z axis is taken as internuclear axis that means all bond making will happen around z axis…

Q: Is the a( electrophillic or neucleophillic ) ( addition, elimination or substitute) reaction?

A: Given : structure of reactant and products.  Tip : Here nucleophilic substitution reaction occurring…

Q: these molecules are mirror images ?

A: Since, In mirror image, one molecule is not superimpose to other molecule and its structural formula…

Q: N₂(g) + 3H₂(g) — 2NH3(g)

A:

Q: Which of the following molecules may show a pure rotational microwave absorption spectrum and, in…

A: (a) H2 --> rotationally inactive (b) HCl --> pure rotational microwave absorption spectrum (c)…

Q: CO(g) + H₂O (g) a. Write the Kc expression for this reaction. b. If a 1.00L vessel is charged with…

A: Kc Q Reaction direction  Equilibrium concentration

Q: What is the total mass of the excess reactants left over after the reaction is complete? total mass…

A: The given balanced equation is- Al2O3 (s)+6NaOH (l) + 12HF (g)→2Na3AlF6 +9H2O (g)

Q: A student dissolves 200 g of a compound in 100.0 g of water in a calorimeterThe temperature of the…

A: Endothermic reaction :  Endothermic reactions are chemical reaction in which the reactants absorb…

Q: Phenol is an acidic organic compound for which K₂ = 1.3 × 10-10. What is the pH of a 0.28 M solution…

A: pH = -log[H3O+]  pH < 7 acidic solution pH > 7 basic solution pH = 7 neutral

Q: Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive)…

A:

Q: Calculate the pH of a 0.0063 molL-1 solution of curcumin- please include how you did it!!

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Q: 0.302 grams of an antibiotic was dissolved in enough water at 23.6°C to make 500.0 mL of solution.…

A: We will use formula of osmotic pressure and given data to calculate the molar mass of antibiotic.

Q: 50.00 mL of 0.20 M HNO2 (nitrous acid, K₂= 2.52 x 104) is titrated with a 0.20 M KOH solution. What…

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Q: Sulfur dioxide is a colorless gas with a strong odor that is produced when fuels containing sulfur…

A: Equilibrium concentration  Kc Equilibrium concentration

Q: A compound is found to contain 31.42% sulfur, 31.35% oxygen, and 37.23% fluorine by mass. a. What…

A: we have to calculate the empirical formula and molecular formula of the compound

Q: Eic current of 25.10 A transports 790. μµC of charge. Calculate the time this took. your answer has…

A: Charge (q) = current (i) × time (t)

Q: Calculate ΔG° for the following reactions at 25°C using the standard free energies of formation of…

A: Given reaction: H2O(l) → H2O(g) We have to calculate the ΔG° for the reaction at 25°C using 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.