If the molar mass of potassium is 39.10 g/mol and the molar mass of K2SO4 is 174,3 g/mol, then the mass percent composition of potassium in K2SO4, is 44.87%. True or false.

Q: Draw the product for the reaction in the space provided. H3C- CH3 CH H -CH3 + H₂O -> Select Draw…

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Q: (3) Q5.18 Homework Unanswered If electricity costs $0.12 per kWh, then what is the total cost for a…

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Q: A sample of gas occupies 7.91 L at a pressure of 857 mmHg. Determine the new pressure (in atm) of…

A: Given, Note: 760 mmHg = 1 atm Initially Pressure (P1) = 857 mmHg = (857/760) atm =  1.12763 atm…

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Q: 1. Convert 1357 feet into kilometers. (1 mile = 5,280 feet) (1 mile = 1.609 km) 2. Convert 4.2…

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Q: Determine the volume (in liters) of a 29.8-g sample of CH4 gas at 597 torr and 554°C.

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Q: Write a mechanism for the step shown below, using curved arrows to show electron redistribution.…

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Q: Does doubling the concentration of an alkylhalide and maintaining the alkoxide concentration double…

A: Given that, the alkoxide (RO-) reaction with alkyl halide (R'-X). We have to answers What happened…

Q: Consider the reaction Na2CO3+2HCl=2NaCl+CO2+H2O If 10.6 g of sodium carbonate reacts fully with an…

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Q: A 4.90 L sample of neon at 7.24 atm is added to a 13.0 L cylinder that contains argon. If the…

A: Answer is given below

Q: Draw the major product of the reaction shown. 1 Bri 01 O II O III OIV OV OMe || ||| IV V

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Q: light used in gas chromatography- mass spectrometry? If so, how is it used?

A: Yes light can be used in GC-MS. The explanation is as follows:

Q: NO₂ 1) Zn, HCI heat 2) NaOH ? 1) NaNO₂, HCI 2) HBF4 F you a a) b) yo yor d) HO ? 1) Å, AlCl3 2) H3O*…

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Q: The two compounds shown below have the same chemical formula. Which compound would you expect to…

A: Boiling point : The temperature at which a liquid converts into it's vapour and maintains…

Q: According to the following balanced chemical equation, which reactant would be the limiting reactant…

A: Limiting reagents is a reagent that consumed first in chemical reactions

Q: Calculate the density of nitrogen (N₂) gas at 0°C and a pressure of 11.0 mmHg.

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Q: Give two advantages of using GF-AAS compared to Flame-AAS

A: GF-AAS (Graphite furnace atomic absorption spectroscopy) are more sensitive than flame atomic…

Q: 13.6 Assign the resonances in this ¹³C NMR spectrum. 180 160 Ho 2 140 120 4 100 PPM 80 60 40 20 0

A: Chemical shift : The frequency of a target nuclei expressed relative to a standard compound in a…

Q: 2) Consider a water sample in a closed system with CT,CO3=8x10-4 M and pH=8. a) What is the…

A: Given, Ст, соз =8×10-4   , pH=8 (a) Alkalinity of the sample = pOH=14-pH⇒14-8= 6

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A: The given compound is azulene which contains two ring one is cycloheptatriene and other is…

Q: What is the molar solubility (in mol/L) of Pb(OH)2 (Ksp = 5.72⋅10−16) in a solution buffered at…

A: Pb(OH)2  → Pb2+ + 2 OH-    .......... (1) Let the molar solubility of Pb(OH)2 is s M according to…

Q: What is the product of the following elimination? nos **** to to to to to I || ||| IV V COI Oll OMe…

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Q: The vapor pressures of CCl4 (A) and C₂HCl3 (B) between T = 350 and 360 K, can be determined…

A: The answer is given below:

Q: Which atomic spectroscopy is a more preferred method in the analysis of trace levels (such as ppb…

A: Atomic absorption spectroscopy is preferred

Q: Write the mass balance equation for Li3PO4, charge balance equation for a solution of Ca(HCO3)2, and…

A: #Q.1: Mass balance equation for Li3PO4:  In the mass balance equation, we make the total…

Q: Draw the starting material needed to complete this reaction. Ignore inorganic byproducts. Select to…

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Q: Part IV. The following transformation has a similar mechanism to the Swern oxidation. Show the…

A: Swern oxidation is a organic reaction in which primary alcohols are oxidized to aldehydes and…

Q: Calculate the frequency of radiation with a wavelength of 4.92 cm. Calculate the frequency of…

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Q: 37. What is the percentage strength (w/w) of a solution made by dissolving 62.5 g of po- tassium…

A: we have to calculate the (w/w)%

Q: The density of a gas is 1.49 g/L at a temperature of 24 ∘C and a pressure of 0.789 atm. Calculate…

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Q: Choose all the following that are incorrect formation reactions. A.N2(g)+202(g)-+2N02(g) B.…

A: In this question, we have to Choose all the following that are incorrect formation reactions.

Q: Calculate the molar concentration of formic acid, HCOOH (K₂ = 1.80 x 10-4) that was 3% ionized.

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Q: 31. How many liters of a mouthwash can be prepared from 100 mL of cinnamon flavor if its…

A: % v/v concentration is defined as the milliliters mL of solute dissolved in 100 mL of solution…

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Q: Which of the molecules below has a dipole moment?

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Q: When 3.5 g of CaF2 (an insoluble salt, Ksp = 3.9 X 10-11) is added to water to make 200. mL of…

A: mole  = mass  /  molecular weight molecular weight of CaF2 = 78.07 g/mole concentration = mole  *…

Q: 6. How many milligrams of methylparaben are needed to prepare 8 fluidounces of a solution containing…

A: Fluidounce =29.6 mL. Convert 8 fluidounces into to mL as follows: 8 fluidounces*( 29.6 mL /1…

Q: Use the following balanced equation to answer the question: CuSo4(aq) + Fe(s)→ FeSO4(aq)+ Cu(s)…

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Q: Draw the structure of any diastereomer of (2R,3S)-dichloropentane. Take particular care to indicate…

A: The isomers having same bond connectivity but differing in spatial orientation are called…

Q: Explain why graphite furnace atomisers provide enhanced sensitivity over flame atomisers in AAS…

A: Advantages of graphite furnace atomisers over atomic absorption spectroscopy

Q: If 0.100 moles of NaOH are added to a 1.00 L 1.00 M HNO₂/1.00 M NO solution, then what would be the…

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Q: The standard reaction free energy AG = -87. kJ for this reaction: TiCl4(9) + 2 H₂O(g) TiO₂(s) +…

A: Here we are required to find the standard Gibbs free energy for the given reaction.

Q: CuSO4(aq) + Fe(s) Fe2(SO4)3(aq) + Cu(s) and CuSO4(aq) + Fe(s) FeSO4(aq) + Cu(s) as balanced…

A: Answer is given below

Q: Propose a reaction starting material and reagents to prepare diphenyl sulfide in the laboratory.…

A: Diphenyl sulfide is an aryl sulfide that is composed of two phenyl groups joined by a sulphur atom.…

Q: The reaction written below has a ΔH of +2,662 kJ/mol          6CO2(g) + 6H2O(g) --> C6H12O6(g)…

A: Carbon dioxide reacts with water to form glucose and oxygen. The equation for the balanced chemical…

Q: eight-carbon polyene (CH2=CH-CH=CH-CH=CH-CH=CH2) can be modeled mensional particle in a box of…

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Q: What is the name of this molecule? Don't forget to include stereochemistry! Br OH

A: The given problem is based on the nomenclature of organic compounds.

Q: At a constant temperature and pressure, the reaction of 150 mL of N₂ gas with 150 mL of H₂ gas via…

A: Given data :

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.