An average gas fireplace uses about 200 gallons (760,000 cm3) of propane gas per year. Assume that the propane, C3H8, behaves as a perfect gas for the conditions of this problem, which are 1.00 atm and 22°C. What is the mass of gas used?

Q: How much heat (in kJ) is required to raise the temperature of 72.0 g of water from 35°C to 103°C of…

A:

Q: What is the angle between two of the carbon-hydrogen bonds in the methane (CH4) molecule? 0° X S

A:

Q: b Complete the following table for an isotopically-labelled atom or ion: Group of Element Group 2A…

A: To complete the following table for an isotopically-labelled atom or ion.

Q: 85.0-kg person is exposed to 419 rad of radiation. How many joules did this person absorb?

A:

Q: Q1. A 100 g soil containing 20% smectitie mineral matter was mixed with 150 mL solution containing…

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Q: 5. Lance obtains a silvery metallic unknown. He weighs the metal and finds that he has 60.55g. When…

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Q: choose the pair of substances that are most likely to form a homogenous solution

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Q: Consider the following system at equilibrium where Kc = 0.159 and AH° = -111 kJ/mol at 723 K. N₂ (g)…

A: We would use Le-Chatelier's principle to determine the answers.

Q: . A fighter jet must reach a speed of 62 m/s to take off from the deck of an aircraft carrier.…

A: Since, for conversion of m s-1 to miles s-1, 1 mile =1609 m 1hour=3600 s then,

Q: What is procedure in extraction of beta-carotene from carrot.

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Q: + 2,4-Dinitrophenylhydrazine ->?

A: Ammonia or ammonia derivative reacts with carbonyl compounds to give addition products.

Q: CI OMe OMe LDA (3.0 equiv); Mel Me- -OMe

A: In this question, we will draw the reaction mechanism in the presence of LDA  LDA is strong base and…

Q: A 0.20-g sample of a purified protein is dissolved in water to give 2.0 mL of solution. The osmotic…

A: Molarity of solution is defined as number of moles of solute dissolved per litre of solution. We…

Q: Consider the following system at equilibrium where AH = 92.7 kJ and Ke = 1.80 x 10-4, at 298 K.…

A: The chemical reaction in equilibrium is: NH4HS(s) ⇌ NH3(g) + H2S(g) ; ∆Ho = 92.7 kJ ; Kc = 1.80*10-4…

Q: Calculate the amount of heat needed to boil 156. g of ethanol (CH,CH,OH), beginning from a…

A:

Q: Determine the molecular geometry below

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Q: The weight in grams of NaOH can be computed if the number of moles and the molar mass are given. O…

A: Using mole concept easily determines how much mole , molecular weight is used or formed in any…

Q: Resonance: Resonance form of ethyl propanoate Part A Draw the resonance structure of the following…

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Q: (a) How would you determine the numerical value of the theoretical heat of reaction, DHrxn for the…

A: Given : Initial temperature of the water = 72oC

Q: For a certain hydrocarbon gas, 20.0 mg exerts a pressure of 24.7 torr in a 500-cm3 vessel at 25…

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Q: 1. For the reaction: H2 +Cl2 ----->  2HCl, 3.7 moles of H2 are mixed with excess HCl. How many moles…

A: 1. For the reaction: H2 +Cl2 ----->  2HCl, 3.7 moles of H2 are mixed with excess HCl. How many…

Q: Which of the following molecules follows Huckel's Rule? Choose all that apply.

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: H 17

A: Kindly repost last question.  Thanks

Q: If 12.3 g of Cu is deposited at the cathode of an electrolytic cell after 5.50 h, what was the…

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Q: onsider the following mechanism for the reaction between nitric oxide and ozone: O3(g) + NO(g) →…

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Q: MCC powder contains 86.6% proteins and WPI powder contains 93.4% protein. Calculate the amount of…

A: The amount of powder required can be figure out from the concentration of solution required.

Q: Select the stronger acid: XX H H equally acidic

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Q: H. Calculate AGRxn using the AG values in your references. I. Is the reaction spontaneous at this…

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Q: In a solution of acetone and water, the mole fraction of water is 0.212. If the vapor pressure of…

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Q: Gaseous ethane (CH₂ CH₂) reacts with gaseous oxygen gas (0₂) to produce gaseous carbon dioxide (CO₂)…

A:

Q: Draw the Lewis structure for (CH3)4NCI, a salt. Draw the Lewis structure by placing atoms on the…

A: Lewis structure can be defined as the structure that represent valence shail electrons of all atoms…

Q: Guanine, as it would appear at physiological pH, is shown below. One of the pKas of guanine, which…

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Q: The molal freezing point depression constant =Kf·7.96°C·kgmol−1 for a certain substance X. When…

A: Answer: We will calculate the depression in freezing point using following formula:…

Q: In Example 2-1, we established that the mass ratio of magnesium to magnesium oxide is 0.455 g…

A: We have been provided with the ratio of magnesium to its oxide. Let us calculate other required…

Q: Name the structures of aldehydes and ketones below:

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Q: Anhydrous, primary standard sodium thiosulfate can be prepared from the pentahydrate, Na2S2O3.5H2O.…

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Q: Predict the chemical formula for the ionic compound formed by the elements Al and I

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Q: Me OH TSOH Me

A:

Q: Choose the correct IUPAC name for the following compound: Oa) 2,5-hexadiene Ob) 2,5-heptene Oc)…

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Q: The rate of a certain reaction is given by the following rate law: rate=k[H₂] [1₂] Use this…

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Q: You are asked to prepare a buffer solution with a pH of 3.50. The following solutions, all 0.100 M,…

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Q: Draw the sketch structure of [CH3CH2C2CO]-

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Q: 10. Match up the compounds on the left below with the solvent which would best dissolve it (on the…

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Q: An analyst was measuring the performance of a HPLC column. The test solute was Toluene (5 µL). The…

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Q: 14. OMe поба ОН HO2C² 12 NaHCO3 OMe он

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Q: Express the concentration of a 0.0760 M aqueous solution of fluoride, F, in mass percentage and in…

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Q: Calculate the pH from the H+ concentration. 5.2 x 10-12 M

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Q: Consider the following system at equilibrium where Kc = 2.90x10-2 and AH° = 198 kJ/mol at 1150 K. 2…

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Q: Step 4. Place remaining electrons on the central atom. If the structure is already correct, or no…

A: Examine the structure & if it is not correct draw a correct structure.

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.