A hot-air balloon has volume of 851 L at 291 K. to what temperature (in K) must it be heated to rise its volume to 1.200 x 103 L, assuming the pressure remains constant?

Q: how many grams of glucose are needed to prepare 455 ml of a 1.6 (m/v) glucose solution

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Q: Convert : سلام سلام

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Q: -0 0-

A: -> Acetal can formed when carbonyl compound reacts with alcohol in presence of acid .

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Q: What is the value of Kc for the reaction below if at equilibrium [A] = 0.60 M, [B] = 0.30 M, [C] =…

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Q: 4-(3-nitrophenyl) butanenitrile OH H₂N-

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Q: What is recorded as the final temperature (in C) on a constant pressure calorimeter if 12.718 g of…

A: Given the mass of sodium sulfate, Na2SO4(s) added = 12.718 g  Molar mass of Na2SO4(s) = 142.04 g/mol

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Q: What is the mole fraction of HA at pH 3.00 given H₂A = H+ + HA Ka1 = 1.0e-3 HA H+ + A² Ka2 = 1.0e-9

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Q: Which of the following aqueous mixtures would be a buffer system?   A) C6H5COOH, KC6H5COO   B)…

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Q: NH4HS(s) ⇒ NH3(g) + H₂S(g) K = [NH3][H₂S] K = 1.2 x 10-4 What is the concentration of the H2S when…

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Q: 2X2 + Y2 → 2X₂Y R = K[X₂]²[Y₂] Trial [X₂], (M) 1 2 3 0.220 0.440 0.220 [Y₂], (M) 0.150 0.150 0.300…

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Q: Determine the rate-law expression for the reaction below at the temperature at which the tabulated…

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Q: OH HO CH₂ 8...- + HCI- á CN Cl₂ AICI, N AICI, CI OH C-CH3 -MgBr H+ (two products) heat

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Q: 21. A 220 lb patient needs 0.2 mEq Ca++/kg/hour for hypocalcemia. How many grams of calcium ion (MW…

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Q: Calculate the pH in an 8.8 × 10-4 M Ca(OH)2 aqueous solution.

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Q: & H₂N 8 H SOCI₂ or P₂O5 or POCI3 Dii Eto 2. H3O+ A OEt NaOEt, EtOH

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Q: Use the following information to complete the statement below. Solution Information Provided 1 2 3 4…

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Q: Convert the mass 0.0465 kg of sodium chloride to grams. O 465 g O 4.65 10-3 g O 4.65 10 2 g O46.5 g

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Q: For the reaction NH4NO3(aq) N₂O(g) + 2 H₂O(1) AG-179.4 k) and AH° -149.6 kJ at 298 K and 1 atm. This…

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Q: Use the standard half-cell potentials listed below to calculate the standard cell potential for the…

A: Given: K+(aq) + e- → K(s),    E∘ = -2.93 V I2(s) + 2e- → 2I-(aq),    E∘ = +0.54 V We have to find…

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Q: Benzoic acid has a Ka = 6.5 X 10-5.  What is its buffering range?     1-3     5-7     3-5…

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Q: What is the concentration of Cu2+ (aq) in the solution?

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Q: Which one of the following compounds is the most basic? a b d.

A: Basicity is a property which tells how easily something can share its electron.

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Q: What is the most stable conformation for trans-1,2-dichlorocyclohexane. Describe and explain briefly

A: We can solve this problem by drawing chair form of 1,2 trans dichloro cyclo hexane ring.

Q: What are the quantum numbers and their properties?

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Q: A substance has a vapor pressure of 22. torr at 20.7 oC. Calculate the temperature (oC) at which the…

A: The Answer to the following question is-

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.