Write electron configurations for the following ions, and determine which have noble-gas Configurations Cr3+ N3- Sc3+

Q: Calculate the number 0.1515 M K₂Cr₂O₂ (aq) of mole of 48.

A: Molarity of  K2Cr2O7 = 0.1515M Volume of solution = 48.85ml= 0.04885L

Q: A radio station's channel, such as 100.7 FM or 92.3 FM, is actually its frequency in megahertz…

A:

Q: QUESTION 16 What is the pH of a 0.20 M solution of the weak base ephedrine (Kb = 1.4 x 10-4) at 25…

A: 16.) A weak base will react with water to give hydroxide ions. So first we would write equation and…

Q: Write a balanced net ionic equation to show why the solubility of Mg(OH)2(s) increases in the…

A: Data given Suppose the strong acid = HCl  • The balanced equation is :-     When Mg(OH)2 reacts with…

Q: 4.3 The major product/s that form/s during the nitration of benzenesulfonic acid is? choose the…

A: We have to tell the major product form upon nitration of benzenesulfonic acid.

Q: The combustion of gasoline (C8H18) leads to a change in internal energy, AU of 5404 kJmol-1 at 298.0…

A: Given : reaction reaction Tip : ∆H = ∆U + ∆ngRT

Q: A piston has an external pressure of 6.00 atm. How much work has been done in joules if the cylinder…

A:

Q: What type of oxygen-based functional groups may be present in the molecule, based on the IR? Can the…

A: Given that the molecular formula of an unknown compound is C6H12O. The degree of unsaturation of…

Q: It takes 52.0 J to raise the temperature of an 9.00 g piece of unknown metal from 13.0∘C to 25.0 ∘C.…

A:

Q: What is the concentration in %w/v of a 0.425 M aqueous solution of methanol (MM = 32.04 g/mol)? A)…

A: Given, Molar Mass of Methanol = 32.04 g/mol Molarity of methanol = 0.425 M

Q: What is the mass percentage of O in C₃H₈O₂? A) 21.03% B) 57.94% C) 72.58% D) 42.06%

A:

Q: What is the difference between an element and an isotope?

A: The basic difference between elements and isotopes are given below.

Q: PARLO Draw the major products obtained from heating each of the following others with one equivalent…

A: Ethers reacts with HI to give alcohols and alkyl iodides.  When primary and secondary alkyl groups…

Q: What is the best solvent system for TLC that would elute this compound? And why is that solvent…

A:

Q: Consider this balanced reaction:     K = 79.51 atm-1 2NO2 = N2O4 If 3.95 atm NO2 is added to a…

A: Nitrogen dioxide forms dinitrogen tetraoxide. The equation for the balanced chemical reaction is as…

Q: Q7/ Oxygen at 30 °C and 300 kPa absolute pressure ex- pands isothermally to an absolute pressure of…

A:

Q: When chloroethane is treated with lithium metal, as shown below (step 1), an alkyllithium reagent A…

A: Alkyllithium compound is the most common carbanion reagents in laboratory-scale synthetic chemistry;…

Q: Given that at 25.0 °C K for HCN is 4.9 x 10-10 and Kb for NH3 is 1.8 x 10-5. calculate Kb for CN and…

A: To calculate the value of Ka and Kb , we would use the relation between Ka and Kb given as : Ka × Kb…

Q: A compound has the following percent compositions. Find the empirical formula of this compound.…

A:

Q: What is the pH of a 4.3 × 10⁻⁴ M CsOH solution?

A: Given concentration of CsOH = 4.3 × 10-4 M  Cesium hydroxide is a well known strong base . Strong…

Q: Convert 0.531 mol of 0.531 mol Nha ammonium Eq (NH₂+) rons to едитка

A:

Q: CI ОН

A: In this reaction base will abstract the most acidic proton from OH and convert OH into O- which then…

Q: Show a detailed mechanism of the following reaction: + R-NH₂ R or". + H₂O

A:

Q: What is the approximate concentration of free Ag+ ion at equilibrium when 1.79x10-2 mol silver…

A: Given: Moles of silver nitrate = 1.79×10-2 mol Molarity of S2O32- = 1.10 M Volume of solution = 1 L…

Q: For each of the following pairs, indicate which element has the smaller first ionization energy…

A: Ionization energy (EI): When an electron is removed from the outermost shell of an isolated gaseous…

Q: What is the pH of a 0.00230 M solution of HCl?

A:

Q: How many signals would be present in the ¹HNMR?

A: Given : structure of molecule. Tip : 1HNMR Signals = types of hydrogen

Q: Based on their electron configurations, predict whether these elements are paramagnetic or…

A: Paramagnetic elements are those which have unpaired electrons While diamagnetic elements have all…

Q: A ______________ is the sharing of electrons between two atoms.

A:

Q: complete the following table

A: Here ,some elements are given .we have to find out the name , atomic number,mass number, number of…

Q: What is the empirical formula of copper chloride for this lab?

A: Mass of copper chloride taken for analysis = 2.021 g  Mass of copper(Cu) produced is equal to the…

Q: How many signals would be present in the ¹HNMR?

A:

Q: If 23.9 g of CH₃OH (MM = 32.04 g/mol) are added to a 500.0 mL volumetric flask, and water is added…

A: Molarity (M) is a concentration term for a solution. The molarity of the given solution is defined…

Q: A solution contains 1.37x10-2 M zinc nitrate and 1.29x10-2 M barium acetate. Solid sodium carbonate…

A:

Q: Calendar Mastering Chemistry Assignme X ← → C…

A: Given - CO(g) +2H2(g) ->CH3OH(g) Kc=2.3×104

Q: For each of the following compounds determine which (if any) lone pairs are participating in…

A: If lone pair is in conjugation with vacant p-orbital or double bond then they become delocalised.

Q: Determine precipitation sequence (qualitative). A solution contains 0.20 M potassium sulfate and…

A: Solid lead nitrate was added slowly to a mixture of solution containing 0.20 M potassium nitrate…

Q: Write a balanced net ionic equation to show why the solubility of Ni(CN)2(s) increases in the…

A:

Q: What mass of precipitate (in g) is formed when 82.4 mL of 0.500 M AICI reacts with excess AgNO3 in…

A:

Q: Consider the insoluble compound silver chloride, AgCl. The silver ion also forms a complex with…

A:

Q: The elements in the periodic table are grouped by similar chemical properties, which come from the…

A: Group 1 and 2 belong to s-block Group 13 to group 18 belong to p-block

Q: In the Redox reaction shown + Fe(s) + CuCl2(aq) -----> Cu(s) O A. Fe, Fe2+ OB. Cu, Cu2+ OC. Cu2+, Cu…

A: The Answer to the following question is-

Q: What volume (in mL) of water must you add to 50.0 mL of a 0.600 M LiBr solution to produce a 0.185 M…

A: Given :-  Initial concentration of LiBr solution (M1) = 0.600 M  Initial volume of solution (V1) =…

Q: In the presence of excess OH, the Zn2+ (aq) ion forms a hydroxide complex ion, Zn(OH)42-. Calculate…

A: Given data :

Q: 2) Calculate the filling factor for the diamond structure.

A: The diamond structure has face-centred cubic structure. There are 8 atoms in its cubic structure,…

Q: The yellow-brown haze associated with smog comes from the NO molecule called

A: The yellow-brown haze associated with smog comes from the NO molecule is called as photochemical…

Q: What is the ¹H NMR splitting pattern of the indicated hydrogen? H O doublet O multiplet

A: To find out splitting we have to use following formula Splitting = (N +1) Where N= number of…

Q: The number of electrons and protons is given directly by the ______________.

A:

Q: A solution contains 1.37x10-2 M zinc nitrate and 1.29x10-2 M barium acetate. Solid sodium carbonate…

A:

Q: A solution contains 2.37x10-2 M calcium acetate and 2.37x10-2 M lead nitrate. Solid ammonium…

A: Here we have to calculate concentration of calcium ion when lead begin to precipitate-

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.