A sample of solid silicon is heated with an electrical coil. If 133 Joules of energy are added to a 11.0 gram sample initially at 20.6°C, what is the final temperature of the silicon? Answer: °C.

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A: In redox reaction oxidation and reduction takes place simultaneously . In oxidation there is loss of…

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A: Dear student since you have posted multiple questions we will solve the first question for you if…

Q: Ph Br 'Н La Ph 013 1) LIAIH₂ 2) HO B HOⓇ (b) A (a)

A: We have given the organic reaction and we have to find the mechanism of the reaction.

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Q: ing compounds is optically active? Assign R/S to each chiral center. A) Br Br Za C/ F (B) monal…

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Q: 1. You must prepare 250 ml of (0.1 mM EDTA, 2% w/v SDS, 40 mM NaCl) given 4.68% w/v NaCl (FW 58.44),…

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Q: from 9 0₂ lost (#2) → mol O₂ lost from mol O₂ lost (#3)→ mol KC103 from mol KC10₂ (#4) →g KC103² 3.…

A: From the mass of O2 gas lost we can figure out moles of O2.

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Q: 4. Draw the correct structure for each of the following c A) 2R-bromo-3S-pentanol B) 3-methyl-2E,…

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Q: An ethyl group (CH3CH2-) that is attached to a quaternary carbon has what splitting pattern in a NMR…

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Q: Question 1 Write the structures of the organic products (A-K) in the following reactions. Ph l Br…

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Q: How many moles of neon occupy a volume of 14.3 L at STP? O 32.0 moles O 36.7 moles O 1.57 moles…

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Q: When octane (C8H18, density = 0.699 g/mL) undergoes complete combustion, it provides energy…

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Q: Calculate the volume of 1000 ppm chromium (VI) stock solution needed to prepare 100.00 mL each of…

A: The formula of dilution is  C1V1 = C2V2 Where, C1 and C2 are initial and final concentrations of the…

Q: Which of the following correctly gives the correct coefficients for the reaction below? N₂H4 + H₂O2…

A: Count the atoms of each element present on both sides of the reaction in order to balance the…

Q: A tank contains helium gas at 490 mmHg, nitrogen gas at 0.75 atm, and neon at 520 torr. What is the…

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Q: Complete the following table. Be sure each of your answer entries has the correct number of…

A: Here, we have to convert the energy values as required to fill the table.

Q: 1. 2. For the following weak acid, write a Bronsted Lowry acid base reaction with water showing the…

A: Bronsted Lowry acid is a proton (H+) donor and base is a proton (H+) acceptor.

Q: (CH₂(CH₂) CH₂) reacts with gaseous oxygen gas to produce gaseous carbon dioxide (CO₂) and gaseous…

A: Given -> Weight of octane = 2.3 gm  Weight of O2 = 4.9 gm

Q: What is the molarity of 100ml unknown Ca2+ solution when 5.20 g of CaC2O4·H2O is measured?

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Q: the following strong ▼ 0.320 g of HClO3 in 2.40 L of solution. Express the pH of the solution to…

A: We know that -> pH = -log[H+]

Q: 1- Draw structures of alkanes that meet the following descriptions: An alkane with two tertiary…

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Q: (4) Which of the following is a stronger nucleophile? Explain. a. NH₂ or NH3 b. H₂O or CH3COO

A: Basically, nucleophiles are electron-rich species with the ability to donate electron pairs because…

Q: Draw one of the possible diastereomers of the molecule shown below. Use a dash or wedge bond to…

A: Given structural formula of a compound. We have to draw a structure of its diastereomer

Q: Macmillan L A student places a block of hot metal into a coffee cup calorimeter containing 152.6 g…

A: Given, mass of water = 152.6 g initial temp. = 21.8 °C final temp. = 37.0 °C We know, specific heat…

Q: Draw the major product of this reaction. Include stereochemistry if applicable. Ignore byproducts.

A: Given: structure of reactant. Tip : Sn2 reaction will occur.

Q: Complete the table below by deciding whether a precipitate forms when aqueous solutions A and B are…

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Q: For electromagnetic radiation, when wavelength goes UP, frequency goes DOWN. True False

A: Given,Electromagnetic radiation.

Q: Given the equation Ag (aq) + 2NH, (aq) [Ag(NH,),]*(aq) K₁= 2.00 x 107 determine the concentration of…

A: Given data :

Q: Determine delta H* for the following thermochemical equation. Pb(s) + PbO2(s) + 2SO3(g) ->…

A: The explanation is given below-

Q: Using the table of standard formation enthalpies that you'll find under the ALEKS Data tab,…

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Q: What temperature (in °C) did an ideal gas shift to if it was initially at -15.5 °C at 4.62 atm and…

A: Given that an ideal gas shift to if it was initially at -15.5 °C at 4.62 atm and 35.0 L and the…

Q: Draw the enantiomer of the molecule shown below. Use a dash or wedge bond to indicate…

A: Enantiomers = A pair of optically active compounds which are mirror images of each other known as…

Q: 10. You're tasked with making 100 mL of 50 mM acetate buffer with a pH of 5. You have a solution 0.3…

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Q: In the above redox reaction, use oxidation numbers to identify the element oxidized, the element…

A: Given - Zn + I2 + 4OH- -> Zn(OH)42- + 2I- ->The element which has oxidation number increases…

Q: NaCl is a soluble compound O True O False

A: IUPAC name of NaCl is sodium chloride. It is used as common salt.

Q: Aqueous hydrobromic acid (HBr) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Given ,          Mass of HBr is = 78.5 g       Mass of NaOH is = 33.4 g . The 1:1 molar ratio…

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Q: Hi. Can you please help? I'm stuck. Thanks! When you titrate 25.0mL of 0.100 M HCl with 0.100 M…

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Q: Which substance would be least likely to act as an acid? HCl, NH4,  H3O, or NH3? Would it be NH3?

A: Acid are the substances which has tendency to donate H+.

Q: In flourences why quenching occurred? Solve it steps by steps.

A: Fluorescence quenching is any process that decreases the fluorescence intensity of a sample.  It is…

Q: Based on this ¹H NMR spectrum, choose the compound that is the most likely to match the integration,…

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Q: Primidone (shown below) is an anticonvulsant used to control certain types of epileptic seizures.…

A: Stereoisomers are Isomers that have same composition but that differs in the orientation in the…

Q: For the following combustion reaction CH₃COCH₃(l) + 4O₂(g) → 3CO₂(g) + 3H₂O(g) ∆H = -1.79 × 10³ kJ…

A: This is exothermic reaction. one mole of acetone combustion leads to produce heat 1.79 × 10³ kJ in…

Q: Choose the best reagents to complete the reaction shown below. mal H al A B D E 1. NaBH. 2. H₂O* Na…

A: Internal alkynes can be reduced into trans alkene when they react with sodium metal in liquid…

Q: 3 Ca + 2 AICI3 → 3 CaCl₂ + 2 Al If 2.6578 moles of Ca are reacted with 198.8 grams of AICI3, how…

A: For finding grams of any solute , firstly we have to find out the No. Of Moles .  No. Of Moles Of…