Directions: (1) Write the electron configuration of the following elements. (2) Determine their valence electrons. (3) Identify whether STABLE or NOT STABLE. 1. 54 Хе 34 Se 4. °F 5. 86 Rn 2. 3. 17 CI

Q: 100 Donald O'Scientist is given a 0.964 g sample of a weak base was titrated with 0.1 M HCI and the…

A: Given: Mass of base = 0.964 g. Concentration of HCl = 0.1 M And the titration curve given is,

Q: Which element has an quantum angular moment (L) of 0. OU O Mg O Fe

A: there are 4 types of quantum numbers-  1- principal quantum number 2- angular moment quantum number…

Q: A voltaic cell is constructed from a standard Al3+|Al  half cell (E° red =-1.660 V) and a standard…

A:

Q: Br CHz CH3 OH

A: This reaction will follow SN1 mechanism , which involve formation of carbocation and carbocation…

Q: Part II. Directions: Using the Hund's rule, write the electron configuration of the following…

A:

Q: This molecule has how many chiral centers in it? H. 1 2 H-C-OH НО-с-Н H-C-OH 5. H-C-OH 6, CH2OH

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Q: Calculate molarity if 200mg of HCl is dissolved in 5L of solution. H=1.008 , Cl= 35.45

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Q: structure

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Q: Vhich of the following combinations can e used to make a buffer? (Assume equal olumes are used.) A)…

A: The combination that can be used to make a buffer is

Q: Which compound gives brick red precipitate of cuprous oxide with Benedict's solution? *   a.…

A: Ketones will give negative test to Benedict solution.

Q: A student performs a calorimetry experiment. The student combines 100. g of 0.40 M HC1(aq) with 100.…

A: When the temperature of solution increases this means heat is released during the reaction and it is…

Q: (i) Give the molecular, structural and displayed formulae of the following molecules: (a) 2, 2 –…

A: Given molecules :  (a) 2, 2-dimethylpropane  (b) 3- bromo-2, 4, 4-trimethyloctane

Q: Which of the following characterizes a beta ray? Choose all that apply. O is more penetrating than a…

A: Beta rays are  composed of negatively charged particles called beta particles , these are similar to…

Q: Average Exposure to Radiation from Common Sources Source Dose (mrem/year) Naturally Occurring…

A: The data given is,

Q: Write the complete chemical equation, give the correct IUPAC name of the product/s. 1. 2-pentene…

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Q: 1. Name this compound: HOCCHCH3 ÓCH3

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Q: Complete the reaction. Add hydrogen atoms and charges to the appropriate atoms. Select Draw Rings…

A: given compounds are :- Amide and Water and acid . So, it is acid catalysed hydrolysis of amide.

Q: When the nuclide boron-8 undergoes positron emission: The name of the product nuclide is The symbol…

A: Positron dmission means decay of +10e then,

Q: Assign Re and Si face to an SP2 hybridized carbon (C=O or C=C) Can you explain how to get it and…

A: Re and Si face are face of attack by reagent.

Q: A chemical reaction that happens quickly is spontaneous, and a reaction that happens slowly is…

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Q: the pressure of the gas?

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Q: the following pairs, choose (circle or underline) the type of radiation associated ency (or shorter…

A: Electromagnetic radiation spectrum is arrangement o various radiation in order to increasing…

Q: 10. Which of the following elements would have the greatest difference between the first and second…

A: The element which has the greatest difference between the first and the second ionisation energies…

Q: 3. Using the Wittig reaction, propose a synthesis for 2-methyl-1-phenyl-1-propene.

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Q: If a voltaic cell is created between a Sr2+/Sr electrode and a In3+/ln electrode, what species is…

A: We know, Higher the standard Electrode potential higher will be the ability to behave as oxidizing…

Q: Explain why each name is incorrect, and then write a correct name a.    1-Methylpropene b.…

A: Name of the organic compounds are done according to VSEPR theory.

Q: Which has higher solubility in water? CH3(CH2)5NH2 or [CH3(CH2)5NH3]+ Cl-   Question 19 options:…

A: CH3(CH2)5NH2 can form hydrogen bonding with water while [CH3(CH2)5NH3]+ Cl- cannot form hydrogen…

Q: How long will it take for 97.9% of the

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Q: (i) Give the molecular, structural and displayed formulae of the following molecules: (a) 2, 2 –…

A:

Q: The specific heat of toluene, C7H8, is 1.13 J/g-K. How many joules of heat are needed to raise the…

A: Given :-  Specific heat of toluene = 1.13 J/g.K  Mass of toluene = 40.0 g  Initial temperature =…

Q: Name the following amide. N- N butyl N methyl butanamide N,N diethyl butanamide N ethyl N methyl…

A: ->functional group is atom or group of atoms which give specific properties to the compound.

Q: Determine the equilibrium constant, K.

A: Initial pressure of Cl2 = 3.018 bar Initial pressure of SO2 =1.290 bar Total pressure at equilibrium…

Q: Two moles of acetyl chloride was mixed with two moles of dimethylamine. After the reaction is…

A: Given reaction is Nucleophilic addition reaction.

Q: Which of the following describes the reaction: ° Bi → He + 0 TI 81 83 alpha decay reaction O beta…

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Q: Copy the structure of EDTA4- from your textbook and circle all six atoms that act as Lewis bases.…

A: EDTA: It's full name is Ethylenediaminetetraacetic acid.  It is a chemical that binds certain metal…

Q: is titration with 0.123M solution of NaOH calculate the ph of the equivalence point ka=1.8x10^-7

A: Given, Ka = 1.8 ×10-7 pKa(HA) = 6.74 Molarity of HA = 0.124 M Volume of HA = 95.6 mL Molality of…

Q: The overall reaction of hydroxide radical with nydrogen gas occurs as follows: DH(g) + H2(g) H20(g)…

A: Formula Arrhenius equation log (k1k2) = Ea2.303 R1T2-1T1 Where k1 = rate constant = 1.29×107 L/mol.s…

Q: The solubility of CaF, in water at 25 °C is measured to be 0.017 Use this information to calculate…

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Q: Find the noble gas having the same electronic configuration with Sr+2. Z of Sr = 38 Group of…

A: Atomic number of Sr = 38  Sr has total 38 electrons

Q: C,HsO,C, Co,CHs čo,C,Hs CH,CH,COOH

A:

Q: Consider the following half reactions in the attached image and their corresponding standard…

A: Given:

Q: Create 50 mL of a pH = 10.00 buffer solution using solid bicarbonate (NaHCO3, baking soda, pKa =…

A: Given: Mass of NaHCO3 taken = 1 g. And pH of the solution = 10.00

Q: che percentage of total annual radiation f

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Q: (Q51) Which of the following compounds are generally dissolve in water (i.e., are soluble)?…

A: Insoluble/slightly soluble in water :  SrSO4(poorly soluble) Al(OH)3 PbBr2 Li2CO3 (very slightly…

Q: The pressure of a sample of gas is measured with an open- ended manometer, shown to the right. The…

A: As per the rules only the first question can be answered:

Q: 7.00 grams of Cobalt (II) nitrate are dissolved in 1.00 liter of water. What is the initial…

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Q: Butenes, such as 1-butene undergo isomerization in the presence of a catalyst to form isobutene…

A: The equilibrium reaction given is, Given: K = 0.72  Pressure of 1-butene = 1.79 bar. And the…

Q: The cell potential was 1.271 V at 25oC and a Al3+(aq) concentration of 0.178 M. What was the…

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Q: voltaic cell is constructed from a standard Mn2+|Mn half cell (E° red = -1.180V) and a standard…

A: The electrode with negative reduction potential is anode and the one with positive reduction…

Q: 48- A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water, the density of resulting…

A: Molality is defined as numbers of moles of solute divided by mass of solvent in kg .

Actinides

The elements in which the extra electron tends to enter the 5f-orbitals of (n–2)th main shell are considered 5f-block elements. They are also named actinides. Actinides include 15 elements, from atomic number 89 to 103.