Calculate the atomic mass given these naturally occurring isotopes and abundances: Silicon: Si-28 (92.23 %), Si-29 (4.67 %), Si-30(3.10 %)

Q: O RBCI

A: Moles = mass / molar mass Molarity =Moles/Volume (L) As we know, Higher the molar mass of solute, lo...

Q: thermometer A 58.2 g sample of polystyrene is put into a calorimeter (see sketch at right) that cont...

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Q: This question is based on the five compounds (A-E) given below. CH;-CH=CH-CH3 (B) (C) (A) CHCI=CHBR ...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for ...

Q: Calculate the value of the equilibrium constant (Keq) for the following reaction: 2 CO (g) + 6 H2 (g...

A: Recall the reaction for which value of equilibrium constantKeq is to be determined         2 COg + 6...

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Q: Which sequence of reactions will convert benzene to 3-chloroaniline in a reasonable yield? (Hint: a ...

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Q: Calculate the percentage mass composition of the following substance a. Ethanol ( C2H6O ) b. Gypsum...

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Q: Aqueous sulfuric acid (H,SO4) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium su...

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Q: This question is based on the five compounds (A-E) given below. (A) CH;-CH=CH-CH3 (B) (C) CHCI=CHBR ...

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Q: Gaseous ethane (CH;CH,) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide (CO,) ...

A: Given that, mass of ethane= 13.2 g, molar mass=30 g mol-1 mass of oxygen=45.8 g, molar mass= 32 g mo...

Q: how would you properly balance this reaction?

A: Sodium borohydride, NaBH4, is a reducing agent. It reduces aldehydes to primary alcohols and ketones...

Q: Decreasing the temperature of the reaction CO (g) + ½ O2 → CO2 (g) favors (A) (B) Products Reactants

A: The reaction of carbon monoxide with oxygen is an exothermic reaction.

Q: 1. A 55.0 ml sample of 0.102 M potassium sulfate is mixed with excess lead (II) acetate to produce p...

A: Potassium sulfate reacts with lead(II) acetate to form potassium acetate and lead(II) sulfate. The e...

Q: molarity

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Q: Why volume of 12 M HCL is required to prepare 16L of a 0.25 M HCL?

A: V1= ? M1 = 12 M V2 = 16 L M2 = 0.25 M

Q: Draw the structure of the following complexes: a. [Co(en)2(NH3)CI]2+ b. dichlorobis(ethylenediamine)...

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Q: Select the balanced net ionic equation for the reaction between aqueous lead (II) nitrate and aqueou...

A: Given aqueous lead(II)nitrate and aqueous potassium iodide We need to write the balanced net ionic e...

Q: An atomic absorption method for the determination of the amount of iron present in used jet engine o...

A: The confidence interval CI is given by the following equation., Here, z is the value for the confid...

Q: s pCl fe

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Describe the process of separating salt from sand.Write in one paragraph. Write the word and their, ...

A: Evaporation and filtration is the process by which we can separate the mixture of common salt and sa...

Q: From the data in Table 2.5, compute the concentration of the undiluted and diluted ovalbumin  sample...

A: Calibration curve for standards( Plot of Absorbance vs. concentration of BSA standards) Line of equ...

Q: e limiting reactant? En

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Q: A is solution is prepared by mixing 25 mL of 0.1 M HCHO2 with 25 mL of 0.2 M NACHO2. The pH of the s...

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Q: The reaction 2N20(g) 2N2(g) + O2(g) has AH° = -163.14 kJ. What is the value of AE for the decomposit...

A:     Recall the given reaction, 2 N2O (g)                      2 N2 (g)  +  O2 (g)   ,  ∆H = - 163.14...

Q: 2Na(s) + Cl2(g) > 2NaCl(s) How many grams of NaCl will be produced when 10.0 mol each of Na and Cl r...

A: Number of moles is calculated by dividing the given mass with molecular mass.

Q: Calculate the number of oxygen atoms in a 150.0 g sample of dinitrogen tetroxide (N,04). Be sure you...

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Q: Solid aluminum (Al)and oxygen (0,) gas react to form solid aluminum oxide (Al,o,). Suppose you have ...

A: The limiting reagent and it's chemical formula is given below

Q: Name the highlighted chemical group in each molecule. Lewis structure name of highlighted group H H ...

A: Substituents are  an atom or group of atoms that replaces another atom or group of atoms in a molecu...

Q: The following molarities were calculated from replicate standardization of a solution: 0.5, 0.5002,...

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Q: A chemist determines by measurements that 0.0200 moles of fluorine gas participate in a chemical rea...

A: Given, moles of Fluorine (F2) gas = 0.0200 moles mass of Fluorine (F2) gas = ? Note: Molar mass of F...

Q: What mass (in grams) of sodium acetate (MM=0.82 g/mol) is needed to prepare 500 ml of 75 mM acetate ...

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Q: A practitioner will make a titration curve. The practitioner pipetted 10 mL of 0.1 M HCl solution an...

A: "Since you have asked multiple questions, we will solve the first question for you i.e  (HCl vs NaOH...

Q: A solution that has a hydrogen ion concentration equal to 9.61 x 10-7 has a pH =

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

A: We know that , Number of mole = Given mass / Molar mass  Mass = Number of moles X Molar mass  Molar ...

Q: The elementary reaction 2 NO2 (g) → N2O4 (g) is an example of a/an elementary step. (A) (B) Bimolecu...

A: The elementary reactions are those in which only one reactant reacts to give the product. Like -    ...

Q: Only one of the following changes will shift the equilibrium of this reaction left, favoring reactan...

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Q: What is the name of the major product of the following synthetic scheme? OH 1. CH3CH2NH2, 275 °C 2. ...

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Q: Table 1: Absorbance of Ibuprofen at 221 nm in phosphate buffer (pH 6.8) Concentration of Absorbance ...

A: As per Lambert Beer's law, absorbance is directly proportional to concentration of solution. Mathema...

Q: HO H,O OH + [acid or base] OH Acetylsalicylic Acid (aspirin) Salicylic Acid CH,OH ,A H,SO, (conc.)] ...

A: .

Q: An acetic acid solution was prepared by dissolving 0.02 moles of acetic acid (HOAC) in water to give...

A: The detailed answer has been provided.

Q: (CH,(CH,),CH;) reacts with gaseous oxygen gas (0,) to produce gaseous carbon dioxide (CO,) and gaseo...

A: First of all we will calculate moles of hexane and oxygen.

Q: Consider five solutions that all contain 10 g of solute in 100 mL of solution. Which has the lowest ...

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Q: Please give me an example of a real-world application of cooling curves and determining a substance'...

A: A question based on properties of solids that is to be accomplished.

Q: When the following equation is balanced properly under basic conditions, what are the coefficients o...

A: Details balanced equation is given below

Q: Calculate the mass of glucose (C,H,20,) that contains a billion (1.00 x 10') hydrogen atoms. Be sure...

A: No. of H atoms = 1.00×109 atoms mass of glucose = ? molar mass of glucose = 180 g mol-1 #of H in glu...

Q: Which of the following describes the final major product of the reaction of 2-propanone with excess ...

A: Carbonyl compound (aldehyde and ketone) reacts with an alcohol to form hemiacetal in the presence of...

Q: 5- 0.853 mol of methane gas occupies a volume of 15.0 L at a certain temperature and pressure. What ...

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Q: Name the highlighted chemical group in each molecule. Lewis structure name of highlighted group H H ...

A: Functional group: Functional group is a group atoms which can change the chemical and physical prope...

Q: Draw the crystal-field splitting energy (CFSE) of the following complexes: a. [Cr(NH3)6]3* b. [MnF6]...

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...

Q: Determine the specific heat capacity of 250.0g of an unknown metal. When the metal absorbs 18.1 kJ o...

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.