What is the mass percentage of each element in the compound Al2O3? Enter the percent mass of aluminum and the percent mass of oxygen, respectively, separated by a comma.

Q: Suppose a 500. mL flask is filled with 1.7 mol of Cl₂, 0.50 mol of CHCl3 and 1.5 mol of HCl. The…

A: Here we are required to find the equilibrium molarity of CHCl3 when the equilibrium constant value…

Q: Derive the work expression for the reversible isothermal expansion of a van der Waals gas, assuming…

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Q: Why does the vapor pressure of a liquid increase with increasing

A: Vapour pressure is defined as the pressure exerted by the gas molecules on the surface of the liquid…

Q: 15.21 Complete the following table for a solution: pH [H+] <7 <1.0 × 10-¹M Solution is Neutral 15.21

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Q: .. The protonated form of caffeine is very soluble in water. The deprotonated form is more soluble…

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Q: Identify the correct statement. The (phi) and (psi) angles of a peptide bond describe rotation about…

A: Due to resonance, the C-N bond in the peptide bond has a partial double bond.  The partial double…

Q: Calculate the pH of a 0.78 M KOH solution. Be sure your answer has the correct number of significant…

A: pH is defined as the negative logarithm of H+ ion concentration in solution.It is expressed as  pH =…

Q: [Review Topics] [References] Use the References to access important values if needed for this…

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Q: Suppose a 250. mL flask is filled with 0.60 mol of Br₂, 1.9 mol of BrOCI and 1.3 mol of BrCl. The…

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Q: A 4.48 mg sample of a compound has a molar mass of 158.03 g/mol was dissolved in a 1000 mL…

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Q: A solution is prepared at 25 °C that is initially 0.15M in propanoic acid (HC₂H₂CO₂), a weak acid…

A: Given a solution is prepared at 25 °C with a weak propanoic acid ( HC2H5CO2) and its salt Potassium…

Q: Enter the correct abbreviation for this nucleotide below. Hint: If a deoxyribonucleotide, use a…

A: In this question, we have to write the correct abbreviation for the given nucleotide.

Q: calculate the mass of 800. atom of iron (Fe)?

A: Molar mass = Mass of 1 mole  1 mol = 6.022 x 1023 atoms

Q: OH Compound 1 CI ||||| Compound 3 CI Br Compound 2 Compound 4

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Q: Fill in the missing information: symbol 0 F O atom or ion? check all that apply ✔neutral atom…

A: The atomic number of an atom is the number of protons present in the atom. For a neutral atom, the…

Q: Under the following conditions, which compound is the oxidant and which compound is the reductant? •…

A: Organic matter degradation under aerobic conditions mainly oxidation of organic matter occur in…

Q: What is the frequency of radiation with a wavelength of 442 nm? What region of the EM spectrum would…

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Q: Determine the structure(s) of the most favored conjugate base. B) H₂ H3C-C-C N A) -C=CH

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Q: When metal zinc reacts with hydrochloric acid, what are the final products?

A: Answer:- This question involves the reaction of zinc metal with the hydrochloric acid. So, metals on…

Q: Consider the following reaction. aA +bB →→ cC whose first and second half-lives are 15.9 and 15.9…

A: Given data  :  aA + bB ==&gt; cC  first half life = 15.9 minutes second half life = 15.9 minutes…

Q: What partial pressure of C₂H4 gas (in mm Hg) is required to maintain a concentration of 0.0923 g/L…

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Q: The structure of D-glucose is shown below. Predict the number of the OH groups (not CH₂OH) that…

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Q: What is the partial pressure (in atm) of CO₂ at 468.2 K in a 25.0 L fuel combustion vessel if it…

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Q: An primary consideration when choosing an oscilloscope is its bandwidth. Estimate the rise time for…

A: Given the bandwidth of the oscilloscope, BW = 1.5 GHz  1 Hz = 1 s-1  Since we need rise time in "s",…

Q: Calculate the pH of each of the following solutions: (a) 0.0010 M HCl, (b) 0.76 M KOH.

A: As we know,  pH = - log [H+] Where [H+] is molar concentration of H+ ion. &amp; pH + pOH = 14

Q: How many moles of O₂ will be formed from 2.10 moles of KCIO3 for the following reaction? Answer to 2…

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Q: In a laboratory experiment, students synthesized a new compound and found that when 14.95 grams of…

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Q: 2- Suppose a 0.35M aqueous solution of oxalic acid (H₂C₂O4) is prepared. Calculate the equilibrium…

A: Oxalic acid, H2C2O4(aq) is a diprotic acid with pKa values of pKa1 = 1.25, and pKa2 = 3.81  The…

Q: Pentane and hexane form an ideal solution. At 25.00°C, the vapor pressure of pentane is 488.9 torr…

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Q: You are looking to order new carpet for your bedroom and it costs $ 3.45/ft2. If your bedroom is…

A: Given -&gt; Cost -&gt; $ 3.45/ft2 Area of bedroom = 11.8 m2

Q: A student records the following data in the laboratory when determining the percentage of water in…

A: Answer: When we heat a compound that contains water of crystallization in its structure, it loses…

Q: through an acid-base reaction? Choose all that apply. A) Water B) Diethyl ether C) Ethanol D…

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Q: to access important values if needed for this question. The boiling point of ethanol, CH3 CH₂OH, Iis…

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Q: 15.21 Complete the following table for a solution: pH [H+] <7 <1.0 × 10-¹M Solution is Neutral 15.2

A: pH = -log[H+]  -&gt; [H+] is reverse to pH. -&gt; If pH&gt;7 =&gt; Basic  -&gt; If pH = 7 =&gt;…

Q: Differentiate transition state theory and collision theory. Are they mutually exclusive in…

A: Both transition state theory and collision theory tells about how a chemical reaction is occurring.…

Q: Use the References to access important values if needed for this question. What is the concentration…

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Q: Omatography mass spectrometry (GCMS). First attempts using external calibration proved difficult, as…

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Q: Richards and Willard determined the molar mass of lithium and collected the following data.…

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Q: What is the name of the following compound using the IUPAC system?

A: While writing down the IUPAC name of an organic compound, always choose the longest carbon chain to…

Q: Question 16: Potassium and bromine chemically combine to form the compound potassium bromide. During…

A: Here, we have to find the right information about the bonding in potassium bromide.

Q: A chemistry student weighs out 0.0484 g of hypochlorous acid (HCIO) into a 250. ml. volumetric flask…

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Q: 15.91 Classify each of the following species as a Lewis acid or a Lewis base: (a) CO₂, (b) H₂O, (c)…

A: -&gt; Lewis acid is acid which can accepts loan pair from donar compound. -&gt; Lewis base is base…

Q: We've spent quite a bit of time thinking about the interactions between atoms or molecules, one of…

A: Given the bond energy of 1 mol C-C bond = 348 kJ/mol  We have to find the minimum frequency of…

Q: 8.49 mL of 4.00 M acetone is combined with 10.0 mL of 1.00 M HCl, 15.0 mL of 0.00500 M I2 and 7.95…

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Q: Write the reaction mechanism of DPPH (HAT and SET mechanism)!

A: DPPH radical is a stable free radicle which is commonly used as chromogens. After oxidation…

Q: If your front lawn is 25.feet wide and 20.0 feet long, and each square foot of lawn accumulates 1450…

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Q: Question 5 Carbon-12 and Carbon-14 are both isotopes of the element Carbon. Do they have the same…

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Q: Calculate for overall mean and pooled standard deviation.

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Q: La molecula organica presentada aqui es el resultado de despues de pasar por un proceso/reaccion de…

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Q: 1. Name these aromatic compounds properly. b) a) KC Noz OH Ba че

A: The name of these compounds can depend on the substituents attached to them.

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.