A ww O STATES OF MATTER Using the combined gas law For many purposes we can treat propane (C,H) as an ideal gas at temperatures above its boiling point of -42. °C. Suppose the temperature of a sample of propane gas is lowered from 12.0 °C to -22.0 °C, and at the same time the pressure is changed. If the initial pressure was 0.29 kPa and the volume decreased by 40.0%, what is the final pressure 画 Round your answer to 2 significant digits. de OkPa

Q: Iron ore is reduced to pure iron by smelting, during which the iron (III) oxide in the ore reacts…

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Q: Draw the major product of this reaction. Ignore inorganic byproducts. )=( HBr (excess)

A: This is addition reaction in this HBr adds to triple bond by markovnikov's rule

Q: Predict the starting alkyl bromide that would produce the product shown in the SN1 reaction. Assume…

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Q: You can identify relative strengths of acidity of molecules using key factors such as those in the…

A: This question is based on acidic strength of carboxylic acid.

Q: A chemistry student weighs out 0.184 g of citric acid (H,C,H,O,), a triprotic acid, into a 250. mL…

A: Given- Weight of citric acid= 0.184 g  Volume of volumetric flask =250 mL  Concentration of…

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Q: What is the density of the solid object that is weighed and submerged in water? 23.1 ml. 18.5 ml.…

A: Since the volume of water displaced is equal to the volume of solid as per the Archimedes principle.…

Q: Draw the major product formed when 13- pentadiene reacts with this acid. Do not include any…

A: An addition reaction is a chemical reaction in which two or more reactants combine to form a single,…

Q: 12) a. Draw the pi orbitals for molecule 8 for the bonds indicated in blue (and bolded). F N-…

A: Interpretation-  To draw the pi-orbital for the blue and bolded part of molecule-8 which is given…

Q: Nitrogen and hydrogen react to form ammonia, like this: N,(g) + 3 H2(g) · 2 NH3(9) Also, a chemist…

A: We have to calculate the equilibrium constant value.

Q: 6. Which of the following diagrams illustrate(s) an improper way of spotting a TLC plate? Tell what…

A: In order to spot in TLC properly several rules should be followed.  1. The spots should be above the…

Q: A chemist measures the energy change AH during the following reaction: C;Hg(9)+50,(9) –→ 3…

A: Given reaction: C3H8 (g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (l)             ∆H = -2220 kJ We have to…

Q: How many moles of ammonia would be required to react exactly with 0.470 moles of copper(II) oxide in…

A: The number of moles of ammonia required to react with 0.470 mole of CuO is given below

Q: moles o

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Q: Draw the tautomer of this aldehyde. Include all lone pairs. Ignore inorganic byproducts. H3O+…

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Q: CH3 is: 14. A correct IUPAC name for CH3 a. 1,4-dimethylpentane Ob. 1,4-dimethylcyclopentane c.…

A: Given:

Q: Write the concentration equilibrium constant expression for this reaction. 2+ + Cu (aq)+2…

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Q: How many grams are in 491 mg ? Express your answer numerically in grams. • View Available Hint(s) ?…

A: The unit conversions are performed using equality factor. Here, mg (milli gram) has to be converted…

Q: Draw the missing organic products in the following multistep synthesis. Ignore any inorganic…

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Q: what is the concentration of HCl in the stomach?

A: pH = -log[H+]  [H+] = 10-pH

Q: 4. -Ċ-O-C- A compound that contains the above a. alcohol b. alkoxy group C. antioxidant d.…

A: Two multiple choice questions based on organic chemistry.

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Q: Calculate the amount of heat needed to melt 125. g of solid methanol (CH,OH) and bring it to a…

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Q: An extra-strength aspirin contains 0.500 g of aspirin. How many grains is this? (1 grain = 64.8 mg)…

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Q: A 9.00 L tank at 24.6 °C is filled with 7.29 g of dinitrogen monoxide gas and 5.10 g of dinitrogen…

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Q: A chemist prepares a solution of magnesium fluoride (MgF,) by measuring out 0.018 µmol of magnesium…

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Q: A chemist prepares a solution of calcium bromide (CaBr,) by measuring out 38.3 g of calcium bromide…

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Q: Starting from the wedge-and-dash structure below, rotate the back carbon to provide the Newman…

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Q: Fill in the systematic names of the following chemical compounds. Note: for compounds containing…

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Q: A chemist prepares a solution of iron(III) bromide (FeBr,) by measuring out 36.9 µmol of iron(III)…

A: given, moles of iron(III) bromide in μmol = 36.9 μmol volume of the solution = 300. mL = 0.300 L

Q: A chemist prepares a solution of sodium thiosulfate (Na, S,03) by measuring out 188. g of sodium…

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Q: Draw the product of the reaction shown below. Use a dash or wedge bond to indicate stereochemistry…

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Q: Write the concentration equilibrium constant expression for this reaction. CN (aq)+H,O(1)→HCN(aq)+OH…

A: Given :-  CN-(aq) + H2O(l) → HCN(aq) + OH-(aq)  To write :-  Equilibrium constant expression

Q: What is the IUPAC name

A: Select the longest carbon chain - principle carbon chain Numbering  Sequence for giving IUPAC name:-…

Q: In liposuction, a doctor removes fat deposits from a person's body. If body fat has a density of…

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Q: How many milliliters are in 15.1 dL ? Express your answer numerically in milliliters.

A: To convert 15.1 dL into mL dL= deci litres mL= milli litres I dL = 100 mL

Q: A dessert contains 145.05 g of vanilla ice cream, 82 g of fudge sauce, and 39.3 g of nuts. • Part A…

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Q: Draw the major product of this reaction. Ignore inorganic byproducts. I + I 1 H3O+

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Q: Describe three ways in which colorless compounds can be located on a TLC plate.

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Q: Cycloheptatriene (shown below) is non-aromatic because it A) does not have 4n+ 2 pi electrons. B) is…

A: For compound to be aromatic it must be Cylic Planer Fully conjugate  Contains (4n+2) pi electrons.…

Q: Most of the coal available in the United States is bituminous or "soft" coal, which contains as much…

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Q: Nitrogen and water react to form nitrogen monoxide and hydrogen, like this: N2(9) + 2 H,O(g) → 2…

A: Given reaction: N2 (g) + 2H2O (g) → 2NO (g) + 2H2 (g) Given data: We have to calculate the value of…

Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg, (Si,03),(OH), An…

A: Given :-  chemical formula for talc = Mg3(Si2O5)2(OH)2  number of moles of O in sample = 8.1 mol  To…

Q: Reactions between certain organic (alkyl) halides and water produce alcohols. Consider the overall…

A: The given chemical equation is: (CH3)3CBr(aq) + H2O(l)  -----> (CH3)3COH(aq) + H+(aq) + Br-(aq)…

Q: Wine goes bad soon after opening because the ethanol (CH,CH,OH) dissolved in it reacts with oxygen…

A: We have to predict the moles of ethanol needed.

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.