Define closed-circuit helium dilution?

Q: You were instructed to add 1.0 mL out of 4.0 mL of an undiluted sample to 99 mL of sterile diluent. ...

A:

Q: b) Sulphate ion, SO,2 is used widely in the formation of sodium laureth sulfate, SLES, a common dete...

A: Lewis structure: Lewis structures are diagrams that show the bonding between atoms of a molecule and...

Q: The energy difference between cis- and trans-but-2-ene is about 4 kJ/mol; however, the trans isomer ...

A: Given molecule: cis- and trans-but-2-ene 4,4-dimethylpent2-ene

Q: What are Pseudo unimolecular reactions? Explain with the help of a suitable example.

A: Pseudo unimolecular reactions are those reactions in which the order and molecularity are not equal.

Q: Please see image for question.

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want...

Q: How many 1H NMR signals does each dimethylcyclopropane show?

A: 1H NMR signals for dimethylcyclopropane is

Q: Four possible electron configurations for a nitrogen atom areshown below, but only one schematic rep...

A: When we see configuration A it violates the Hunds rule because the paring cannot happen unless and u...

Q: Which of the following are aromatic explain why or why not?

A: For a compound to be aromatic, it should follow the following four criteria: The compound should be...

Q: Ammonia reacts with boron trifluoride to form a stablecompound, as we saw in Section 8.7. (a) Draw t...

A: (a) The given reaction involves the transfer of electrons from electron rich nitrogen atom to the el...

Q: In a combustion reaction between 700.0 mL propane, C3H8 with oxygen gas, O2 at 25 °C, an unknown gas...

A: The chemical equations should be balanced in accordance with the law of conservation of mass. Accord...

Q: Some ethylene glycol, HOCH2CH2OH, is added to your car’s cooling system along with 5 kg of water. If...

A: Colligative property is the property which depend on number of moles of solute not on nature of solu...

Q: Ethers can be formed between alcohols by ________reactions. oxidation hydration hydrolysis dehydrati...

A: Alcohols gives dehydration reaction to form alkene and ether. If a water molecule is removed from on...

Q: The number and type of atoms in the reactants must equal the number and type of atoms in the product...

A: The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither c...

Q: Which compound is least polar ? SO2 or O2

A:

Q: How would you do number 8 a-f

A: This reaction is hydroboration-oxidation.  In this reaction less substituted alcohols are formed.  B...

Q: 6. What is the freezing point decrease of an aqueous 1m CaCl2 solution? (Kf = 1.86 ◦C/m)? A. -3.72 ◦...

A: Given solution is : 1m aqueous CaCl2 solution. What is the decrease in freezing point of this soluti...

Q: Be sure to answer all parts. A 0.1276-g sample of a monoprotic acid (molar mass = 1.10 × 10 g/mol ) ...

A: Let HA be the monoprotic acid whose mass is 0.1276 g and molar mass 1.10×102 g/mol that is dissolved...

Q: Predict the ion generally formed by (a) Sr, (b) S, (c) Al.

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Q: 1. Explain why both cis and trans isomers are possible for [Co(NH3)2(C;O4)2] but only the cis isomer...

A: Since you have asked multiple question, we will solve the first question for you. If you want any sp...

Q: How will you convert benzene into(i) p – Nitro bromo benzene(ii) m – Nitrochloro benzene(iii) p – Ni...

A: We are authorized to answer three subparts at a time, since you have not mentioned which part you ar...

Q: Directions: Do what is asked. The final answer should be in a complete sentence and in the correct n...

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Two moles of O2 gas at 1 atm and 10 degree C are mixed adiabatically with 4 moles of N2 gas at 1 atm...

A: The formula relating the temperature change, heat capacity and entropy change is shown below:

Q: Please help! Please show all work.

A: The free radical bromination of an alkane is more selective than the free radical chlorination of an...

Q: Solve the question

A: To solve the question:

Q: When alkanes are heated, the C-C bonds rather than the C-H bonds break. Give reason.

A: Alkanes are unsaturated hydrocarbons containing C-C and C-H single bonds.

Q: What do you understand by order of a reaction? How does rate law differfrom law of mass action? Give...

A: The Order of reaction refers to the relationship between the rate of a chemical reaction and the con...

Q: Define rate constant (k). Write the unit of rate constant for the following:(i) First order reaction...

A:   The rate constant is defined as the proportionality constant which explains the relationship betwe...

Q: Consider S, Cl, and K and their most common ions. (a) Listthe atoms in order of increasing size. (b)...

A: The considered elements are S, Cl, and K.

Q: Explain why the Lattice Energy of MgO is higher than LiF

A: The lattice energy(ΔHlattice) of an ionic compound is defined as the energy required to separate one...

Q: How would you do number 6

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Q: Shown below are three amino acids: ČH, Он Tyrosine Tyr Y Alanine Ala A Phenylalanine Phe F 1. Which ...

A: Hydrophobic nature of amino acids depend on the polarity of side chain. If side chain is polar in na...