Which of the following human activities is considered a perturbation to the carbon cycle on Earth? Select all that apply:   a. solar energy   b. land use changes   c. nuclear power   d. fossil fuel combustion

Q: topic: matter does each sample have a measurable mass? how do you measure the mass of each sample? ...

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Q: 12. The molecular mass of butanol, C4H9OH, is 74.14; that of ethylene glycol, CH2(OH)CH2OH, is 62.08...

A: The boiling point of a compound depends upon the the molar mass and force of attraction in the compo...

Q: he experiment is about Spectrophotometric Determination of the Formula of a Thiocyano Complex of Fe(...

A: We have to determine the equilibrium constant for the formation of an iron(III) thiocyanate complex ...

Q: 1. Solve and choose the correct answer from the given choices: a. How many atoms of tin are found in...

A: 1. We have to calculate the number of atoms present in 3.5 moles of tin, Sn. We know that 1 mole of ...

Q: HO PPM

A: The given NMR spectra correspond to the alcohols and iodides with variable number of carbon atoms. 

Q: Consider the gas-phase reaction, 2 SO2 + O2 ⇄ 2 SO3, for which Kp = 2.0 at a given temperature. If t...

A: The equilibrium reaction given is, => 2 SO2 + O2 ⇄ 2 SO3  Given: Kp of the reaction = 2.0 Pressur...

Q: Rationalize the following observations. (1) From Fe(CO)s to Fe(CO):(PPhs)2, absorptions in the IR sp...

A: To know the answer of these questions, we have to know bonding pattern and structure of the molecule...

Q: You are interested to know the Q10 value for mean heart rate (# of beats/10 sec) for a species of cr...

A:

Q: 3. Oxazolidines are important synthetic precursors for the production of drugs. The reason is that t...

A: Here we are given with organozinc reagent, we have to utilize it and have to make the reaction. 

Q: Wet sugar that contains one-fifth water by mass is conveyed through an evaporator in which 85.0% of ...

A: Wet sugar contains 1/5 th of water Weight fraction of water in wet sugar = 0.20  

Q: QUESTION 1 You started with 100g of an isotope and, after 36, days you are left with 6.25g. What is ...

A: Question-1 Radioactive disintegration processes are first order reactions. Initial mass of isotope =...

Q: Calculate the pH of 1.0×104M solution of HNO3. (Round to whole number).

A: Given : We have to calculate the pH of solution.

Q: f. 2,3-dimethyl-4-propyloctane g. 1,3,5-trimethylcyclohexane h. cis-1,2-dipropylcyclopentane i. 2-br...

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Q: Calculate the pH of 2.7 M solution of H2SO4. (only dissociates 1 time)

A: We have been asked to find the pH of 2.7M H2SO4 and it is given that the acid dissociates only for o...

Q: Give the IUPAC name of the compound below.

A:

Q: or the reaction CH4(g) +2H2S(g) CS2(g) + 4H2(g) , Kc = 0.046 at 687oC. In an experiment, 4.00 mol of...

A: Given : We have to predict whether the reaction is at equilibrium or not .

Q: The researchers are requested to prepare a 5.23 mol dm-3 of concentration of Sodium Thiosulphate for...

A: sodium thiosulfate solution that has to be prepared its concentration is 5.23 mol/dm3 or 5.23 mol/L....

Q: By convention, a chemical bond between two atoms with an electronegativity difference of 2.0 is whic...

A: Electronegativity is defined as tendency of atom to attract shared pair of electrons.

Q: A 2.19 mole sample of HNO3 is added to water. The final volume of the solution is 9.97 L. Calculate ...

A: Given: Molees of HNO3 added = 2.19 mol. And the volume of solution = 9.97 L.  

Q: 9) What intra molecular fopces can be used when binds to heceptors! R CH, ocH6.05 H2 NCH2 O05 CH HNC...

A: The intermolecular interactions are the intermolecular forces which mediate interaction between mole...

Q: The alloy brass contains lead as an impurity in the form of lead sulphate (PbSO,). By dissolving bra...

A: Since you have asked multiple questions, we will answer only first question for you. In order to get...

Q: Calculate the percent ionization of a 0.20 M formic acid solution. K = 1.7 ×104 (Set up an equilibri...

A: Below attached file showing the details answer. All the best.

Q: Draw the condensed stuctural diagram for the molecule: 4-amino-5-isopropoxyhex-trans-2-enal

A: Given molecule is : 4-amino-5-isopropoxyhex-trans-2-enal  Draw the condensed structural diagram for ...

Q: Phosphorus pentachloride decomposes to phosphorus trichloride and chlorine gas at elevated temperatu...

A:  

Q: GIVE 5 EXAMPLES CHEMICAL CHANGE AND PHYSICAL CHANGE

A: In chemical change new product are formed whereas in physical changes new product are not formed

Q: An element has the following natural abundances and isotopic masses: 90.92% abundance with 19.99 amu...

A: Given  natural abundances and isotopic masses: 90.92% abundance with 19.99 amu, 0.26% abudance with ...

Q: Identify the following aqueous salt solutions as acidic, neutral or basic solution. NH4ClO4  LiNO3 ...

A: 1. NH4ClO4 is acidic since the salt is obtained by the neutralization of weak base and strong acid. ...

Q: How many moles of NH₃ can be produced from 2.76 moles of nitrogen in the following reaction: N₂ (g) ...

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Q: Identify each of the following groups as an activator or deactivator and as an o,p-director or m-dir...

A: Given : We have to explain whether the gives groups are activator or deactivator.

Q: Draw the structural formula of an alkyne or an alkene or the product of the following reactions: 1. ...

A:

Q: Prepare 2 liter of approximately 0.50M Nacl using solid NaCl

A: Given, Concentration of NaCl solution = 0.50 M = 0.50 mol/L Volume of the solution = 2.0 L Preparati...

Q: Draw the line diagram then write out the condensed structure out for the molecule: 2-ethyl-3-hydroxy...

A: Condensed structures can be defined as the structure that is written in a single line. It help us  t...

Q: If an atomic mass unit equals 1.66 × 10−24 g, what is the mass in grams of 5.00 × 1022 formula units...

A:

Q: How many stereoisomers are possible for ephedrine? Clearly show how you arrived at your determinatio...

A: We can determine the possible stereoisomers by deciding the number of chiral carbon centres present ...

Q: но H,0 он CH3 CBD

A: Alkene reacts with alcohol in presence of an acid catalyst by an electrophilic addition reaction mec...

Q: Options for 1)higher or lower Options for 2)higher or lower Options for 3)weaker or stronger

A: The answer is as follows:  

Q: Prevacid is used to treat gastroesophageal reflux disease (GERD). The chemical formula of Prevacid i...

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Q: What is the hydroxide concentration in a solution with a pH of 12.16 at 25 °C?

A:

Q: Consider the gas-phase reaction of nitric oxide with hydrogen at 1280°C 2NO(g) + 2H2(g)→N2(g) + 2H2O...

A: The gas phase reaction of nitric acid and hydrogen at 1280 °C is given as 2 NO (g) + 2 H2 (g) → N2 (...

Q: a) Propose a synthesis route to prepare the following product from the given starting material. Note...

A: The key intermediates formed in this reaction are alcohol, aldehyde, chlorobenzene derivative, carbo...

Q: In an experiment designed to measure the heat of fusion of ice, 25 grams of ice at 0oC is dropped in...

A: Given: Mass of hot water = 200 g. Initial temperature of water and calorimeter = 30.0 oC Mass of cop...

Q: 5.31. Generate a curve for the titration of 50.00 mL of a solution in which the analytical concentra...

A: In the given problem, the titration curve for the titration of 50.00 mL mixture of 0.1000 M HClO4 an...

Q: List combination of quantum numbers (n, l, ml) that could describe the size, shape, and orientation ...

A: The answer is as follows:  

Q: what is the iupac name and structure of this spectrum

A: From The NMR spectrum we can see that their are of two type of hydrogen in the compound.      

Q: Complete the table provided below for nomenclature of alkanes.

A: The IUPAC name of the compound can be written on the basis of the main carbon chain, functional grou...

Q: Some N2 gas is mixed with some O2 gas, and The picture shows a representative sample of the mixture....

A: Given : We have to calculate the mole fraction and partial pressure .

Q: synthesis. the letters of the reagents in the order that they are used; example: fa. Reagents Availa...

A: Given : We have to write the reagent and prepare the given product from benzene.

Q: Predict the major product(s) you would obtain from sulfonation of o-dichlorobenzene. • You do not ha...

A: Aromatic electrophilic substitution reaction: Benzene and other aromatic compound gives mainly aroma...

Q: Nitrogen and hydrogen react to form ammonia gas according to the following unbalanced equation: N2...

A: Given, N2 + H2 → NH3 Mass of Nitrogen gas (N2) reacts = 2.7 g Hydrogen gas (H2) - excess reactant  N...

Q: 1. Determine whether each of the molecules is aromatic, nonaromatic, or antiaromatic.

A: Aromatic compound are those compounds which are cyclic , conjugated, plannar and follow Huckel's rul...