Give the name, atomic symbol, and group number of the element with Z = 20. Then classify it as a metal, metalloid, or nonmetal.

Q: H3C H3C O CH3

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Q: The following rate law has been proposed for a reaction: rate = k {A}3 {B}2 The reaction rate was…

A: The following rate law has been proposed for a reaction: rate = k {A}3 {B}2 The reaction rate was…

Q: Compare the pH of a 0.040 M HCl solution with that of a 0.040 M H₂SO4 solution. (Hint: H₂SO4 is a…

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Q: The molar composition of a gas is 10% H2, 10% O2, 30% CO2 and balance H2O. If 50% H20 condenses, the…

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Q: A piece of a newly synthesized material of mass 25.0 g at 80.00°C is placed in a calorimeter…

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

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A: We have given four molecules and we are asked to identify that which molecule is covalent and which…

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Q: Combustion of a hydrocarbon in a limited supply of air produces CO in addition to CO₂ and H₂O. When…

A: Combustion of 2.33 g of a hydrocarbon C2H5 in air produces 2.24 g CO, 3.53 g CO2 and 3.61 g H2O…

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Q: Given the half-cell of the standard hydrogen electrode: Pt/H2(a=1)/H+(a=1) (Solution)…

A: The standard hydrogen electrode is represented as: Pt|H2 (a=1)|H+(a=1) and the half reaction is…

Q: For the following initial and final states shown below in the diagram, a transition occurs involving…

A: When an electron jumps from lower shell to higher shell, then it absorbs energy in the form light.…

Q: Put these elements in order from the smallest atomic radius to the largest atomic radius: Nitrogen,…

A: A

Q: You time travel 100 years into the future and learn that se and D) have been discovered. Several…

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Q: What product(s) would you expect from dehydration of the following alcohols with POCI3 in pyridine?…

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

Q: Calculate the pH value of the solutions ( with the following parameters: c(H2PO4 ) = 0.23 mol L…

A: Solution 1 Volume = 0.942 L Concentration of H2PO4- = 0.23 mol/L Concentration of HPO4-2 = 0.42…

Q: 2-25. The compound is initially at 40°F. If the pressure is constant at P = 1 atm throughout the…

A: We may proceed via these way,

Q: Crystals form when Seed crystals should be Seed crystals are necessary for approximate size of…

A: We have to fill in the blanks for the above question.

Q: 1. Below is a biopolymer. State what type of biopolymer it is and the name of what type of covalent…

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Q: Question 4 Initially, a closed vessel at 150 °C has a partial pressure of IBr of 0.350 atm and…

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Q: What is the pka of the indicated hydrogen? 45 5 H O 10 O none of the above

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Q: A water-soluble salt formed by Hg2+ and acetate 47.863 g was dissolved in a solution containing…

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Q: Enter full electron configurations for each of the following ions. F− Express your answer in…

A: Atomic number of fluorine is 9 but since it has a negative charge so the atomic number of fluorine…

Q: What is the boiling point elevation and freezing point depression all about, and how is it related…

A: Solution is made up of two Components: solute and solvent. The component which is present in major…

Q: Which product would you expect to obtain from the following SN2 reaction? Br CH3ONa CH3OH H3C.…

A: Sn2 reaction: The reaction follow second order kinetics. It is a one step reaction. There is no…

Q: 3. a) Write out and balance a combustion reaction for ethane. Balance the chemical equation: b)…

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Q: How much water must be added to 100.0 mL of 0.450 M HCl to obtain a 0.175 M solution of HCl?

A: First we would calculate the total volume of 0.175 M solution that can be made using the 100.0 mL…

Q: 7 For the reaction 2 NH3(g) → N₂(g) + 3 H₂(g), the value of the equilibrium constant is 2.00 at…

A: LeChatelier's principle: When factors like concentration, pressure, temperature, inert gases that…

Q: A. An ice cube is 20 mm on a side. How much energy is needed to melt the ice cubes if their initial…

A: The length of the ice cube = 20 mm  The temperature= 32o F   We have to calculate the energy needed…

Q: The human body obtains 1065 kJ of energy from a candy bar. If this energy were used to vaporize…

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Q: Question 9: Draw the structure of the simplest benzene compound with an aldehyde group and an alkyl…

A: In this question we need to draw the structure of the simplest benzene compound with an aldehyde…

Q: 20. AcOH A 1) Mel 2) KOH COOH

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Q: (i) A thermally insulating container has a membrane separating the container into two equal parts.…

A: The statement which is not true for the gas is: D) There is no entropy change for the system.

Q: MISSED THIS? Watch KCV 14.5 WE 14.4 Read Section 14.5. You can click on the Review link to access…

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Q: dm mol E17D.1 (b) The Arrhenius parameters for the gas-phase decomposition of cyclobutane, C₂H, (g)…

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Q: B. A 1.0-mol sample of an ideal gas is kept at 0 °C during an expansion from 0.003 m³ to 0.01 m³.…

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Q: If nicotine and acesulfame reacted to form a salt, what would be the ratio of nicotine to…

A: One molecule of Nicotine can accept 2 protons One molecule of Acesulfame can donate 2 protons

Q: A Question 5 Retake question You determine the empirical formula of a compound to be CH3. In a…

A: Empirical formula = XY  Molecular formula = (XY)n  n= Molecular mass/Empirical mass  A balanced…

Q: Combustion of a hydrocarbon in a limited supply of air produces CO in addition to CO2 and H2O. When…

A: Given data :

Q: Draw the product of the following reaction sequence. H3C- LIBH4

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Q: Assuming that the rate-determining step in the reaction of 1-hexanol with hydrogen bromide to give…

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Q: You may refer to the states of matter when considering the answer to this question. 4 2 5 3 b Some…

A: In thisquestion, we have to select the Processes which are endothermic. To convert one state to…

Q: when you calculated the mass of the oxygen used in the reaction, what was the answer in grams not…

A: In this question, we have to calculate the mass of oxygen used in the reaction in the preceding…

Q: Compound A has a partition coefficient (Kp) of 3.5. If you start with a solution of 150 mg of…

A: Mass of compound = 150 mg Kp of compound for ether : water = 3.5 volume of water = 1 mL i.e. 1000 uL…

Q: Consider the following organic compound. When a mole of this compound undergoes complete combustion,…

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Q: A molecule containing iron, sulfur, carbon and hydrogen has a molecular mass of 411.76 g/mole. The…

A: Given, Mass % of C = 11.67 % = 11.67 g Mass % of H = 2.94 % = 2.94 g Mass % of Fe = 54.25 % = 54.25…

Q: What is the mass percent of sugar in a beverage if 450.8 g of the drink contains 36.4 g of sugar?

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Q: Estimate the value of the equilibrium constant at 675 K for each of the following reactions. ΔG∘f…

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Q: Q1: A. 6 kg of steel, specific heat capacity 500 J\Kg K, is heated from 59°F to 212°F C. How much…

A: Mass of steel (m) = 6 kg  Specific heat capacity (C) = 500 J Kg-1 K-1  Initial temperature (T1) =…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.