Which of the following is the least hazardous form of chromium? Group of answer choices chromium(VI) chloride (CrCl6) dichromate (Cr2O72-) chromium(III) oxide (Cr2O3) chromate (CrO42-)

Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here.

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Q: Submit Answer $ T R A sample of krypton gas collected at a pressure of 0.820 atm and a temperature…

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Q: A 100.0 mL SAMPLE OF 0.180 m LiOH is titrated with 0.270 M HCIO4 determine the pH of the solution…

A: To find out the pH, first find out the concentration after adding HClO4 and then use this…

Q: 3. If 25 g of iron (II) chloride reacts with 48 g of sodium phosphate, what is the limiting reagent?…

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Q: (Na2SO4=142.05g/mol; Na2S-78.05g/mol, C=12.01g/mol; CO=28.01g/mol) Sodium sulfide, Na2S, is used in…

A: Limiting reactant: A reactant that is totally consumed when the chemical reaction is completed is…

Q: Q.) What is the equilibrium constant for the following reaction if the reaction is reversed and…

A: At equilibrium, the rate of the forward and the reverse reaction is the same and the concentration…

Q: Sodium bicarbonate gives solutions that are slightly alkaline (approximately pH 8.3), and similar…

A: Here we have to determine the pH of 0.26M Sodium carbonate solution.

Q: Identify the atom with the ground-state electron configuration shown for its valence shell. 4s²3d 10

A: Electrons are filled in a different atomic orbital in an atom. According to the Aufbau rule, the…

Q: Consider the structure below, which is the best Lewis structure of the two resonance forms, A or B,…

A: In stable Lewis structure,  all the participanting atoms have zero formal charge

Q: What is the mass of one mole of Calciumin grams ?

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Q: "Acid rain" forms when rain falls through air polluted by oxides of sulfur and nitrogen, which…

A: 1) Here given---- pH of the acid rain = 3.41 We know---- pH = - log [H+] Or, [H+] = 10-pH  Now…

Q: A(g) +B(g) ⇒ AB(g) Kc = 0.24 AB(g) + A(g) ⇒ A₂B(g) Kc = 3.8 2A(g) +B(g) ⇒ A₂B(g) Kc =?

A: Equallibirium constant for third reaction can be calculated as:

Q: A chemist fills a reaction vessel with 3.33 atm chlorine (C1₂) gas, 9.77 atm phosphorus (P4 gas, and…

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Q: As eggs age, the pH of the egg white increases from about 7.9 to 9.3 as the carbon dioxide diffuses…

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Q: 3. The end point is the point where equal masses of reactants combine */^~²) 2-) O False True

A: 3)The endpoint in a titration is defined as the point at which the indicator changes colour.  Note:…

Q: Aluminum reacts with Cl₂ to form AICI3. If you have 0.712 mol of Al, what amount (mol) of Cl₂ is…

A: The unbalanced chemical equation is: Al + Cl2 → AlCl3  Amount of Al initially taken = 0.712 mol…

Q: esc STARTING AMOUNT ! AMB 0¹ F1 . X 3662 @ F2 1 # 80 F3 15 How many moles of aluminum are required…

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Q: Describe the molecular geometry of the central atoms in; a) CH3COOH b) CH3CHCH2 c) CH3CCCH₂OH

A: Molecular geometry of a atom is the arrangement of the groups around that atom. It is based on the…

Q: How many calories are in 1001 kilojoules? (1 cal = 4.184 J) 1 4 7

A: This can be calculated as:

Q: Write the Molar The Mass?es? 2 2-Chloropropanedioic acid (chloromalonic acid) (±)-2-Hydroxy-2-pheny-…

A: To write the molar mass of the above  given compounds, first we have to draw the structure of the…

Q: 75.0 mL-AgNO X STARTING AMOUNT 75.0 mL AgNO, 1 L Agl 1000 mL AgNO 1 1000 LAGT How many moles of Agl…

A: This can be solved using stoichiometric calculation as shown below

Q: 4. In a titration of KOH solution, 0.0742 g of KHP is weighed into a flask and dissolved in…

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Q: What volume in mL of 0.3000 M NaCl solution is required to produce 0.2000 moles of NaCl? 1 4 600 mL…

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Q: Two sucrose solutions, 125 mL of 1.50 M C12H22O11 and 275 mL of 1.25 M C12H22O11, are mixed.…

A: Given: Molarity of first sucrose solution (M1) = 1.50 M Volume of first sucrose solution (V1) = 125…

Q: In the synthesis of the keto acid just given, the dicarboxylic acid decarboxylates to give the…

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Q: Which of the following undergo solvolysis (SN1) reactions? A A only B only both A and B neither A…

A: Unimolecular nucleophilic substitution reaction (SN1): This reaction proceeds in two steps. The…

Q: The most widely used method for bilirubin analysis uses two reagents, ____________ and ___________,…

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Q: λ = A photon has an energy of 2.59 x 10-19 J. What is the wavelength of the photon?

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Q: A 25.00 mL sample of unknown sulfuric acid solution requires 22.62 mL of a 0.100 M NaOH to reach the…

A: First we need ta balance reaction between Sulfuric acid and NaOH. Then using the molarity and volume…

Q: in which of the following reactions will Kc =Kp

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Q: 3. Show the step(s) necessary to transform the compound on the left into the acid on the right. M.C…

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Q: The concentration of Na+ in seawater, 0.481 M, is much higher than in the cytosol, the fluid inside…

A: Seawater M1 = 0.481 M V1 = 1.50 mL   Cytosol M2 = 12 mM = 0.012 M V2 = ?

Q: Which of the following statements are true for batteries? Select all that apply. A. Lithium…

A: To state if the given statements are true or false:

Q: What are the products for the reaction of iron( III) nitrate and sodium hydroxide?

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Q: How are the electrodes cleaned? with HCI, dip the electrode in and swirl around until the solution…

A: The question is about cleaning an electrod.

Q: Show the step that leads to the hybrid orbital of the following molecule. Name the hybrid orbital…

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Q: Sort the following molecules or ions into their proper three-dimensional molecular shapes Drag the…

A: Shape of molecules or ions.

Q: Determine the total volume in milliliters of water a chemist should add if they want to prepare an…

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Q: 1H 11 10 2H 2h 3H 3 An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an…

A: We have give the structure of the unknown molecule from the given proton and carbon NMR spectrum and…

Q: Determine the mass percent composition of a solution made by dissolving 21.1 g of KF in 415 g of…

A: Mass of KF = 21.1 g Mass of water = 415 g Mass of solution = 415 + 21.1=436.1g

Q: If the combustion of methane is a second-order reaction, and [CH4]0 = 5.02 M, and k=1.7 x 10^-3…

A: To calculate the concentration after a given time for a second order reaction, we need to use the…

Q: A) 3-propyl-4-ethylheptane B) isooctane C) 3,4-dipropylhexane D) 4,5-diethyloctane E) None of these…

A: In IUPAC nomenclature: First, choose the longest carbon atoms chain i.e. contains the highest…

Q: Consider an electrochemical cell made up of Cul Cu²+ and Ag | Ag* half-cells. Part 1 of 2 Write the…

A: In an electrochemical cell, electrical energy is produced from the spontaneous cell reaction at the…

Q: Calculate the oxidation number of sulfur in HS₂O3. Include a "-" in front of the number where…

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Q: could someone label each of these for me as either methyl, 1°, 2° or 3°?

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Q: In the given question we have to calculate the following value with correct significant figure.  23…

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Q: Calculate A for a process in which 0.160 mole of an ideal gas expands from 1.0 L to 3.5 L against a…

A: We will calculate work done in the process, since its isothermal process so we will use the formula,…

Q: 2. Name this compound properly. H₂C CH3 OH OH

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Q: Question 20 of 36 Provide the correct IUPAC name for the skeletal (line-bond) structure shown here.…

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Q: Write the Molar St Mass?s?

A: Given : name of compounds Tip : first draw structure then determine molar mass

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.