Element Mg AI si Þ S CI Ar ATOMIC 12 13 14 15 17 18 Configuration

Q: When is decantation applicable in separating solids from liquids

A: When the liquid has to be separated leaving the solid behind in a liquid mixture, then decantation…

Q: The structure of haemoglobin: A. has an alpha-beta architecture. B. is a hetero tetramer. C. is a…

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Q: Now that you have the contribution from the X-19 isotope (2.715) and from the X-21 isotope (18.00),…

A: Given the contribution from the X-19 isotope = 2.715 amu contribution from the X-21 isotope = 18.00…

Q: Consider a hypothetical chemical reaction: A+B C+D (In this equation A, B, C and D stand for some…

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Q: STOICHIOMETRY IN BALANCED EQUATION Answer the following below. Show your solution for each…

A: Number of moles is calculated by dividing the given mass with molecular mass. Here we have to…

Q: What do these four elements have in common? Hydrogen (H) be Oxygen (0) 4e 2e Carbon (C) Na 2e 1e Be…

A: We are given structures of 4 elements we need to describe which thing is common to all.  In an atom…

Q: 2 a и H Na₂Cr₂0 21₂0, NHS Cl₂cla, Acetone 10% pd/c, Ammarium formate Eto Ac Meok=1:1 E

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Q: Determine the density of a metal weighing 342.0g that displaces 10.5ml of water when placed in a…

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Q: A 0.015 M benzoic acid with pH 3.01, has a hydrogen ion concentration of 9.7 O True O False

A: pH of solution is defined as negative logarithm of hydrogen ions present in the solution. We have to…

Q: The rate of a certain reaction is given by the following rate law: rate=k[H₂] [1₂] Use this…

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Q: orbital theory versus the predicted behavior from valence bond theory, if any

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Q: A student decomposes KClO3 and collects 36.5 cm3 of O2 over water at 23 Celcius. The laboratory…

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Q: choose the pair of substances that are most likely to form a homogenous solution

A: Homogeneous Solutions are the solutions with uniform composition and solute gets completely…

Q: Your neighbors are purchasing hamburgers for a backyard barbecue. They are expecting 36 guests and…

A: The problem here will be solved using dimensional analysis.

Q: Nicotine, an alkaloid in the nightshade family of plants that is mainly responsible for the…

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Q: What is the mass number (A) of an iron atom that has 31 neutrons?

A: Mass number is equal to the sum of the number of protons and the number of neutrons.

Q: Met die volgende termochemiese inligting, is hierdie reaksie... Given the thermochemical…

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Q: In a solution of acetone and water, the mole fraction of water is 0.212. If the vapor pressure of…

A: Given: In a solution of acetone and water, the mole fraction of water = 0.212 The vapor pressure of…

Q: Name covalent compounds. Name or write the formula for the following covalent compounds. (a) Write…

A: Systematic names are  part of nomenclature of compounds,  a systematic name is  given in a…

Q: For gravitational forces, select which statements are always true. Are mediated by fields Require…

A: Gravitation force is the force that exists due to the mass of objects separated by some distance.

Q: How many Si atoms are there in a 63.4 gram sample of elemental Si? atoms

A: Given the mass of the Si sample = 63.4 g  We have to find the number of Si atoms.  We can proceed…

Q: The normal boiling point of water is 100.0 °C and its molar enthalpy of vaporisation is 40.67…

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Q: The relationship between [OH] and basicity is?

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Q: X tetracyanoethylene (A) Dipole-dipole interactions SEG London dispersion forces -0=1 -3=1…

A: The attraction forces between the different molecules are known as intermolecular forces. In general…

Q: A molecule has an empirical formula of CH, and its molar mass is known to be 26 g/mol. What is its…

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Q: What is a light year in mi?

A: Usually distance between stars and planets is not measured in kilometres or miles. Because of too…

Q: A doctor orders 0.025 mg/kg body weight of morphine for a patient. If a patient weighs 117 lbs and…

A: Morphine required = 0.025 mg/kg Human body weight = 117 lbs = 53.05 kg Morphine concentration = 5.0…

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

A: Oxidizing agent is the substance that oxidizes the other substance and itself gets reduced. Reducing…

Q: Here are sketches of four electron orbitals: Are any of them s orbitals? List the s orbitals, if…

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Q: An alloy contains 78.7% zinc by mass. If a sample has a total mass of 230 grams, how many grams of…

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Q: log 100 (try without a calculator!)

A: Logarithm is known as the exponent to which a number must be raised in order to get a certain new…

Q: Identify all functional groups in the structure below. Make sure to circle and label  each of them

A: A functional group is an atom or group of atoms other than the main hydrocarbon chain that is…

Q: 1) a. b. If the rate of disappearance of O₂ is 0.125 M/s for a given time period, what is the rate…

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Q: For gravitational forces, select which statements are always true. Are mediated by fields Require…

A: According to Newton's  law of gravitation "The force of attraction between  two object is directly…

Q: Consider a hypothetical chemical reaction: A+B C+D 1 (In this equation A, B, C and D stand for some…

A: The progress of a reaction can be represented by the reaction coordinate diagram. In a reaction…

Q: onsider the following mechanism for the reaction between nitric oxide and ozone: O3(g) + NO(g) →…

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Q: Consider the following mechanism for the decomposition of ozone: 03(g) → O₂(g) + O(g) 03(g) + O(g) →…

A: The chemical species present in mechanism step but missing in oberall chemical equation are…

Q: In a solution of acetone and water, the mole fraction of water is 0.593. If the vapor pressure of…

A: First we will calculate the partial pressure of water and acetone using their mole fraction in…

Q: Question 15 The relationship between Ka and pOH is? O Directly proportional

A: pH scale is used to measure acidity or basicity of a solution. If pH of solution is less than 7 then…

Q: Which element, sodium or magnesium, must have an electron affinity closer to zero? State your…

A: Which element, sodium or magnesium, must have an electron affinity closer to zero?

Q: Question 8 Henderson-Hasselbalch equation is useful in relating the ka of the acid to the pH of the…

A: A buffer solution is a solution which does not change its pH on adding small amount of acid or base…

Q: 8. For the following reactions, determine the value of “x”. a. 4C + S8 = 4CS2 3.2 mol S8 yields x…

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Q: rences to access important values if needed for this question. The reduction of nitric oxide with…

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Q: Identify the major product. X Heat ?

A: Pericyclic reactions are those which can take place in presence of light or sunlight. These…

Q: The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an…

A: Given, Activation energy (Ea) = 5.0 kJ/mol = 5.0 × 1000 J/mol = 5000 J/mol Rate constant (k): k1 =…

Q: Structure (Skeleton) HO H₂C- H₂C CH3 CH3 CH CH3 ECH CH3 CH3 Table 3: Naming Alkynes No. of Carbon…

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Q: Draw a model of a nitrogen (N) atom. The atomic number of N is 7. How many electrons are in  an…

A: Electronic configuration is defined as arrangement of electrons in shell, subshell and orbitals.

Q: A certain substance X has a normal freezing point of  −8.9°C and a molal freezing point depression…

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Q: A concentration cell consists of two half-cells with identical electrodes but different ion…

A: In a concentration cell, the electricity is generated due to the potential difference created by the…

Q: Consider the following mechanism for the formation of tert-butanol: (CH3) CBr(aq) (CH3), C+ (aq)…

A: Alkyl halides reacts with a nucleophilic reagent to give substitution reaction. In the given…