Which of the following samples contains the greatest number of atoms? 2.0 mole of Ar 0.1 mole of Fe O 5 g of He 20 million O2 molecules

Q: What is the molar mass of the compound barium nitrate? g/mol Provide an answer with two decimal plac...

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Q: Calculate the pH of a buffer solution prepared by mixing 50mL of 0.600 M hydrocyanic acid, HCN and 2...

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Q: A 100.0 mL solution containing 0.973 g of maleic acid (MW = 116.072 g/mol) is titrated with 0.364 M ...

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Q: alculate ΔSsys for the heating of 2.00 moles of nitrogen from 25ºC to 200ºC.

A: Entropy of system is given by the equation: ∆S = ∫ nCPTdT Initial temperature =  250C = 2980K  Final...

Q: Locate the radial nodes in the 3s orbital of an H atom. Give them in Å.

A: Solution - According to the question - Given -

Q: What is the outcome of the reaction sequence shown in the box? 1. Base 2. Allylbromide H3CO 3. НСІ, ...

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Q: Calculate the pH of the following: - 0.10 M alanine hydrochloride

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Q: Two (2) grams of vinegar solution was given to you to analyze for the percent acetic acid present in...

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Q: A liniment contains 15 % (v/v) of methyl salicylate. How many mL of the liniment can be made from 1 ...

A: This question can be solved by using the concept of dimensional analysis .  1 pint = 473 ml 

Q: Esterase hydrolyzes ester bonds. For simplicity, only the amino acids whose side-chains interact wit...

A: Introduction :  Hydrolysis can be defined as a double decomposition reaction with water as one of th...

Q: 22. What is the coefficient of O2 after the following equation has been properly balanced? C12H26(1)...

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Q: Fill up the empty boxes with the correct chemical structures. HO. NOH

A: In the given reaction the alcohol is converted into oxime and the number of carbon atoms is increase...

Q: 26. The chemical reaction below is an example of what type of reaction: Mg(s) + H2SO4(aq)→ MGSO4(aq)...

A: Mg(s) + H2SO4(aq) ---> MgSO4(aq) + H2(s)  

Q: If concentration is in mol/L and time is in seconds, what will be the units of the rate constant k f...

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Q: spontaneous?

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Q: OH

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Q: What is the best way to accomplish the following synthesis? heat (CH2=CHCH2)2CuLi NAOH, H2O A) H20, ...

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Q: Calculate how much solid NaH2PO4•H2O and NazHPO4 are required to prepare 50.00 mL of a 0.100 M buffe...

A: Buffer solution: A buffer solution  is an aqueous solution consisting of a mixture of a weak acid an...

Q: Enter your answer in the provided box. Given the same reactant concentrations, the reaction Cog) + C...

A: Rate of the reaction: Rate is the change in concentration of a reactant or change in concentration o...

Q: for hypochlorous acid, HClO, is 3.0×10-8. Calculate the pH after 40.0 mL of 0.100 M NaOH have been a...

A: Ka(HClO) = 3.0 × 10^-8 Volume of NaOH = 40.0 ml Molarity of NaOH = 0.100 M Volume of HClO = 40.0ml M...

Q: "Strike anywhere" matches contain P4S3, a compound that ignites when heated by friction. It reacts v...

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Q: PH3 2. H2O 3. CO2

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Q: How many moles of Cl atoms are there in 65.2 g CHCI3? O 1.64 mol O 3.00 mol O 0.548 mol O 1.09 mol

A: To solve this problem we have to first find the mole of CHCl3 then mole of Cl will be calculated .  

Q: 1. Reaction Rates Cupric Oxide is leached in an acidic solution which results in the formation of Cu...

A: Leaching is a process of extracting a metal from its ore by dissolving it in a certain liquid. The c...

Q: Determine the value of Kc for the following reaction, if the equilibrium concentrations are as follo...

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Q: Some unknown compound reduces the freezing point of benzene from 5.53 to 4.80˚C. What is the molalit...

A: Molality of a solution can be defined as number of moles of solute dissolved per kilogram of solvent...

Q: What volume of 0.220 M HBr solution (in mL) is required to obtain 0.0600 moles of HBr? A) 3.67 L B) ...

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Q: Give the product for the following reaction. CH,CH - 2 CH,OH H* OCH3 CH,CH,- -H OCH3 CH,CH,- -H ÓCH;...

A: Aldehyde react with methanol to form acetal.

Q: Chemistry Find pH of a 1.00L solution containing 0.180 mol CICH2COOH, 0.020 mol CICH2COONa, 0.080 mo...

A: Here we are given a buffer solution of chloroacetic acid and it's conjugate salt. In this strong aci...

Q: Which of the following phosphate salts are insoluble in water? A) (NH4)3PO4 B) Li¿PO4 C) Na3PO4 D) K...

A: Which of the following phosphate salts are insoluble in water.

Q: An Anthropologists can estimate the age of bone by its C-14 isotope content (carbon-fourteen). The C...

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Q: 16 CH3CI(g) + 8 Cl2(g) → 16 CH2CI2(g) + 8 H2(g) K - CH,Cl,] [H] [CH2 CI] [Cl,] CH,Cl]" [H," K = 16 (...

A: Choose the corect option for Kc expression ---

Q: if the pka1 is 4.80 what is the ka1  if the pka2 is 7.34 what is te ka2

A: Given- pka1= 4.80 pka = 7.34  

Q: Identify whether there will be an increase or a decrease in entropy for the system. Nitrogen gas rea...

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Q: Compute for the volume of concentrated HCl needed to prepare 500 mL of 0.1000 M HCI solution.

A: Concentrated HCl is 37℅ pure. 1 L of conc HCl contains 12.18 moles  So Molarity of Conc. HCl = 12.18...

Q: Label one of the test tubes Fe2+. Add 4 milliliters of iron(II) sulfate to the test tube. Label the ...

A: Given that:  1. In one test tube there is 4ml FeSO4 solution.So this will produce Fe+2 (aq) in solut...

Q: Radium-221 has a half of 30 sec. How long will it take for 82% of a sample to decay?(Round your answ...

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Q: 1. Calculate the Ms value of a many-electron wavefunction composed of 4 a electrons and 3 B electron...

A: Concept: ms  (spin quantum number): Spin Quantum Number Specifies the orientation of the spin axis o...

Q: If 0.274 moles of a substance weighs 62.5 g, what is the molar mass of the substance, in units of g/...

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Q: Under certain conditions the rate of this reaction is zero order in ammonia with a rate constant of ...

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Q: (c) Under the conditions described in (b), the half-life of the reaction has been estimated to be 6....

A: Given: Conditions in part b) Initial concentration of NO =1.9 ppm Half life =6.7 x 103 min To calcul...

Q: Consider this reaction: CICH,CH,CI (g) → CH,CHCI (g) +HC1 (g) At a certain temperature it obeys this...

A: The rate law equation is the type equation that can be represented the correlation between the two s...

Q: Calculate the wavelength of a photon (in meters) that has a frequency of 2.83 x 1013 s-1.

A: Given, Frequency of a Photon (f) = 2.83 x 1013 s-1 Wavelength of a photon (λ) = ? m Note: speed of l...

Q: . 1 SO3(g) + 1 H2O(g)⇌ 1 H2SO4(g)  Kp = 0.423     ΔH = +130 kJ a) Write the Kp expression (above is ...

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Q: OH CI NaOH Cl, CI CI CI CI

A: We have to predict the steps of reaction with name.  

Q: Write the acid dissociation reaction of citric acid in water and state the weak acid and conjugate b...

A: Given,  The acid dissociation reaction of citric acid is:

Q: 22. (a) The one-pot synthesis of a spirodiindenopyridine-indoline catalyzed by p- toluenesulfonic ac...

A: Given that the one-pot synthesis of a spirodiindenopyridine-indoline catalyzed by p-toluene sulfonic...

Q: Complete the table below. Round each of your entries to 2 significant digits. You may assume the tem...

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Q: 0JU tile Relerences to acce the structure of the organic product that is expected when the он H2SO4 ...

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Q: Consider an analyte solution of 50.0mL of 0.050M hydrochloric acid, HCl, titrated against 0.10 M so...

A: First we write a chemical reaction between HCl and NaOH .  Then calculate moles of both HCl and NaOH...

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.