What is the differences between an Oxygen atom (16 amu, atomic number = 8) and a Calcium atom (46 amu, atomic number = 20) in terms of their atomic structures and chemical properties.

Q: Heated lithium atoms emit photons of light with an energy of 2.961 × 10−19 J. Calculate the…

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Q: Question 9 The volume of a sample of oxygen is 3.6 L when the pressure is 7.2 atm and the…

A: According to the our policy we should solve only one question (if any subparts present then first…

Q: A 3.0 g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 52.8 mL…

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Q: Draw the major organic product of the reactions

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Q: What is the pH of an aqueous solution with a hydrogen ion concentration of [H+]=2.1×10−7 M?

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Q: Coloque los siguientes compuestos en orden decreciente de magnitud de energia de red K20 Ligo Li0 >…

A: The magnitude of Lattice energy is dependent on following two factors :  1.) Size of cation and…

Q: Provide the mechamism for the given reaction.

A: In this question, we will draw the mechanism. First we need to redraw the structure of starting…

Q: Click the "draw structure" button to launch the drawing utilit Draw the products formed in the…

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Q: Balance this unbalanced equation by entering only whole num it blank) CaHg + O2→

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Q: solution for Step 3 (B)

A: To calculate the concentration of H+ ion given that the concentration of OH- ion is 1.0 × 10-4.

Q: 4. Which of the following statements are trme of chemical reactions? a. The number and types of…

A: Which of the following statements are true of chemical reactions?

Q: Gaseous ethane (CH3CH3) reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and…

A: Given: Gaseous ethane (CH3CH3) reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide…

Q: 11. Write out the steps necessary to make (cis) 2-hexene starting with propyne.

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Q: a) What are the difficulties with the following reaction to synthesize an amine. + HBr Br + NH NH2…

A: Given reaction is :

Q: N2 + 3H2 2 NH3 The Forward reaction is : The Reverse reaction is: At equilibrium the change in…

A: For the given reaction., N2 + 3H2 <==> 2NH3

Q: Ethanol, with AHvap = 40.5 kJ mol-1, has a higher AHvap than methanol, which is 35.2 kJ mol1, due to…

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Q: Using the grignard reaction of alkanes what is the resulting alkane if the reactant is C4H9Br? a.…

A: Grignard reagent is an organometallic compound. It is formed when an alkyl halide reacts with…

Q: Curriculum Expectation B3. demonstrate an understanding of the structure, properties, and chemical…

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Q: Predict how the equilibrium will change with the reaction below for the following stresses FESCN2+…

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Q: Which of the following chemicals would be the best buffer for a pH 9.00 solution: NH3 (Kb =…

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Q: A vernier caliper was used for taking the diameter of a sphere of unknown material. The radius…

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

Q: 30.0g of C2H6 gas are held in a container at 960 mmHg, at 275K. DETERMINE THE VOLUME OF THIS…

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Q: Identifique los 4 números cuánticos que pueden representar el útimo electrón aladido a un atomo de…

A: Given that, Atom = Sr Atomic number of Sr= 38  Identify the 4 quantum numbers that can represent the…

Q: Question 19 Which liquid, water or hexane (CgH14) would likely be a better solvent for a compound…

A: Given compound - C6H14N4O2    There are different type of compounds, with different physical and…

Q: A valence electron is Select ane Othe electron that is in the highest energy level of the atom O any…

A: 1. Electron are negatively charged . 2. Valency electron alwayes takepart in chemical reactions.

Q: Strontium−90 is one of the products of the fission of uranium−235. This strontium isotope is…

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Q: CH3 CH;=CH(CH2)2 , 'N' 35-47% ČO,H

A: In this question, we will write the mechanism so first we need to redraw the starting material in…

Q: What is the maximum number of grams of Cu2S that can be formed when  20.0 grams of S react with…

A: Mass of S = 20.0 g

Q: Question 3 For the lompound the lompound Identify each chiral center possible? Name Are geometricc…

A: Given structure of compound :

Q: Consider the battery. Cd(s) | CdCl, (aq) || CI¯(aq) | Cl, (1) | C(s) Write the reduction…

A: Answer: In Galvanic cell chemical energy gets converted into electrical energy via spontaneous redox…

Q: Which of the following will be diamagnetic? O Ni²+ O Co3+ OMN²+ Sc3+

A: Given :-   Ni2+  Co3+  Mn2+  Sc3+  To identify :- diamagnetic ion

Q: 1. Recall    that    pH    is    shorthand    for    –log[H+]    and    be    aware    that…

A: a)                               If [H+] = 1 M  Then, log[H+] = log (1) = 0            and pH = -…

Q: A protein molecule composed of a sequence of polar amino acids, shown in blue, and a sequence of…

A: Given that the blue part of the amino acid is polar and the pink part is nonpolar. In a phospholipid…

Q: Calculate either [H3O+] or [OH−] for each of the solutions. Solution A: [OH−]=1.43×10−7 M; [H3O+]=…

A: Solution which have pH is greater than 7 is basic . and which have pH is less than 7 acidic.

Q: Find how to get the derivative of the compound BENZIL.

A: Benzil derivatives undergo a reaction with a bismuthonium salt to produce O-aroyl enolates as a…

Q: THE MAIN INDICATOR OF ERIDEMIOLOGICAL RELIABILITY IN WATER DISINFECTION IN WATER SUPPLY STATION (AT…

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Q: 3. Compound X has the formula CasHaBrz. Compound Y reacts with excess H Pd to give GuHooBr

A: First calculate DOU of C45H84Br2 Degree of unsaturation ( DOU) :  DOU = 2C + 2 - H - X / 2  Where…

Q: Nitrogen and hydrogen react to form ammonia according to the reaction shown. 3 H2 (g) + N2 = 2 NH3…

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Q: Sr is an inotope produced from atmosphenic testing of nuclear bombs. If naclear testing was stopped…

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Q: What is the calculated molar solubility in water at 25 °C of AgBr The molar solubility = %3! Ag2CO3…

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Q: A 3.50 L sample of a gas at a pressure of 1.75 atm is compressed to 2.00 L at a constant…

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Q: Which of the following technique/s can be used to determine the amino acid sequence of a polypeptide…

A: A technique of chemical sequencing is used for nucleolus-specific partial chemical modification of…

Q: What is the pH of a 0.20 M HCI solution? O 12.39 O 0.70 O 13.30 O 1.61

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Q: 3. From the balanced chemical equation: 2C6H6(1) + 1502(g) →> 12CO2(g) + 6H2O(1) How much O2 (in L)…

A: The amount of oxygen gas required in litres can be calculated using the balanced reaction.

Q: 2. a) Draw the most stable chair confomation of: cis 1,3-dichlorocyciohexane b) Draw a Newman…

A: The structures of the organic compounds given are

Q: What is the amount (g) of ammonium sulfate needed to make a 0.1M solution in 200 mL of water? (hint:…

A: Molarity is defined as number of moles of solute divide by volume of solution

Q: Consider this ionic isotope. The identity of the element is missing. 39 ? 2+ 20 Which three…

A: The symbol of an element is written as :  AzX  Here , A is mass number.  Z is Atomic number X is…

Q: The elementary reaction 2NO2 (g) → 2NO (g) + O2 (g) is second order in NO2 and the rate constant at…

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Q: The half-life of stroncium-90 is 28 years. How long will it take a 50-mg sample to decay to a mass…

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Q: Calculate the value of work, w, for

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Group 14 Elements

The following elements come under group 14 of the periodic table.