11. A weather balloon on the ground (P 1.0 atm, T-25 "C) has a volume of 90 Liters. At 10 miles up (P=0.053 atm) the volume is 1300 Liters. What is the temperature at this altitude in Kelvins? O 310 143 O228 O 564 O 198

Q: (G) (F) |(H) da. HSO, (C) HNO, (A) (1) FCI, (B) (D) (E) 1. KMOOR (J) 2. HCT

A: Ans -   A)  Substitution Reaction in five memered                         cyclic ring on benzene B)…

Q: Substances can be made to change phase by adding or taking away

A: A phase change of a substance occurs when substance changes from one physical state ( solid, liquid,…

Q: conc. HCI H₂O 010

A: The first reaction is an example of a ring-opening reaction of the epoxide. The second reaction is…

Q: 1. (CH3)2NH, H 2. 3. H3O+ A سعید. ملها. B بعد. C D

A: Step 1: Step 2: Step 3: Step 4:

Q: 3. Derive Cp =-T· P.

A: We use variation in free energy with temperature and pressure

Q: Give me a three sentences about to pure substance

A: Pure substance are the chemical substances which have constant chemical composition.

Q: How do the results relate to litmus paper and the observations to universal paper?

A: Chemical substances are classified into acidic, basic or neutral.  Acidic substances are able to…

Q: If molecules of hydrogen, nitrogen, oxygen and chlorine have the same kinetic energy which molecule…

A: average kinetic energy of molecule = (3/2)KT For all molecule at same temperature

Q: General Chemistry 4th Edition McQuarrie • Rock • Gallogly Consider the data in the table. Compound…

A: The objective of the question is to calculate the entropy change of fusion (ΔSfus) and vaporization…

Q: The organic compound shown in Question 7 contains which functional group? O a. carboxyl O b. ester…

A: To solve this problem we have to identify the functional groups present in the given compound.…

Q: Is this whole section correct?

A: The calculation you have done for the finding mass of water is not correct.

Q: جد OEt 1. NaOEt 2. 0 3. HO H

A: This is an example of Michael addition

Q: Determine the number of valence electrons in SO, and then draw the corresponding Lewis structure (by…

A: Valence electrons: It is the number of electrons present in the outermost shell of an atom. Example:…

Q: IV. Physical and chemical properties. 1. Arrange the following in increasing boiling point Br a. H3C…

A: Boiling point of a compound depends on various factors as discussed in the following step.

Q: Given the following IR data, what is the most likely identity of the compound? Wavenumber (cm ¹)…

A: IR spectroscopy is an important tool for the determination of the functional group in the compound.…

Q: B) () Br Br LDA

A: LDA is bulky base will abstract less hindrence proton and do elimination reaction.

Q: 1. KMNO, NAOH, 2. HO

A: KMnO4 is powerful Oxidising agent and it will be used for breaking of Carbon-Carbon double bond and…

Q: q 6,7,8

A: Recall the given reactions,6. NH3  +  I2  →  N2I6  +  H27. H2O  +  SO3  →  H2SO48. H2SO4  +  NH4OH…

Q: _OH ???

A: alcohols to alkenes in the presence of con.H2SO4 on heating nearly 175oc.

Q: Order these chemical species by increasing pH of an 0.1 M aqueous solution of each. That is, imagine…

A: pH is the measure of acidity and basicity of the solution. A solution with pH lower than 7 is acidic…

Q: HO LIAIH,

A: LiAlH4 is a reducing agent.It can reduce -COOH group to -CH2OH group.But it can not reduce double…

Q: B. H₂C C. EtO. Bz Ph CH3 OEt AICI3 NaOCH3 CH₂OH, A 1) NaOEt 2) Br₂, CH3COOH 1) NaBH4 2) H3O+ workup…

A: AlCl3 ----> Friedel-Crafts acylationBr2, CH3COOH -----> Monobromination at alpha carbon of…

Q: ::&;;$(&;&;&;;

A: Step 1: Explanation: NBS, hv, is used for the allylic bromination of alkene. Allylic carbon is a sp3…

Q: Draw the Lewis structure of Cl2.

A:

Q: .CI HO. (DMSO) Me Me EtgN, CH,Cl,

A: Organic reaction mechanisms

Q: Please match. Pic 1 on the left: Pic2 on the left: Pic 3 on the left: Pic 4 on the left:

A: According to the valency, we can identify different atoms in the model of the molecules. The valency…

Q: match the correct pairs NaCI Choose... fixed geometric patterns Choose... glass Choose... Do not…

A: ∗crystalline substance:1 perfect arrangement                                  2 3D arrangement…

Q: Be sure to show all work and circle the correct answer! 1. One can often estimate the density of…

A: Water(H2O) has 1 O and 2 H atoms. Since the volume of the 2 H atoms is neglected, we have to…

Q: Which of the following statements is a feature of scaled particle theory? a) The work required to…

A: The concept Scaled Particle Theory was given by of Reiss, Frisch, and Lebowitz. It was one of the…

Q: a. green at far top left and top right b. black area c. white-yellow or yellow area in center d.…

A: Temperature is defined as the intensity of heat of a system. A flame or a star has many colours…

Q: 2. In boiling water, the bubbles contain: a. a mix of hydrogen gas and oxygen gas in a 2:1 ra b. a…

A: The question is based on the concept of boiling. we have to explain the process of boiling.

Q: Which one of the following starting materials might undergo the sequence of reactions to give the…

A: To find out starting material let's go reverse step by step.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.