A high-altitude balloon contains 30.0 L of helium gas at 1.00 kPa. When the balloon moves to an altitude where the pressure is 25.0 kPa, what will be its new volume? (Assume that the temperature remains constant.)

Q: Which of the following is/are true about the peptide bond? It has a triple bond character There is ...

A: Amino acids can be defined as the organic compounds containing carboxyl group and amine group.

Q: 10. Nitrous acid (HNO2) is a weak acid with a Ka = 4.0 x 104. If 112 mL of a 0.100 M KOH solution wa...

A: Answer: In this question we have to find out the pH of a buffer solution made of nitrous acid and it...

Q: As a routine safety procedure, acids and bases should be stored separately in a laboratory. Concentr...

A:

Q: Which of the following Gilman reagents could be used with a vinyl halide to afford the (E,E)-diene s...

A: Here we have to determine the Gilman reagents that can be used to synthesise the given E,E- diene.

Q: You need to dilute a solution of 5.78 M sulfuric acid. You need the dilute solution to be 0.75 M and...

A: we know, the expression of the dilution equation is: => M1V1 = M2V2 where, M1 is the concentrated...

Q: Which one of the following ions will react with water via base hydrolysis? [Select all that apply] G...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for y...

Q: For H3PO3, Ka1= 4.06x10^-2 and Ka2= 3.92x10^-7. Calculate the pH of 0.295 molar solution H3PO3

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Q: You wish to measure the iron content of the well water on the new property you are about to buy. You...

A:

Q: Predict the direction of the reaction; consider the equation: CO(g) + H2O(g) (double arrow) CO2(g) +...

A:

Q: In the transamination of an alpha amino acid plus alpha-ketoglutarate, what are the two products of ...

A: In transamination reaction, transfer of an amino group (-NH2) takes place from the amino acid to the...

Q: Draw the structure of citrulline, which is one of the components of the urea cycle. You do not have...

A: Citrulline is an amino acid. It's structure at pH 7 is drawn in the following step.

Q: 1, The pke value of cacium luoride is 10.41. Colculate the solubilly in g/ at 25 Cin a pure water b ...

A: Given: pKspCaF2 = 10.41 To determine solubility in g/L at 25oC in a) pure water b) 0.0200 M Calcium ...

Q: Experiment 1: Preparation and pH of Buffer Solutions Test Data:     Mass of Sodium Acetate :4.0 g ...

A: Given, mass of sodium acetate = 4.0 g Volume of Sodium Acetate Solution= 100.00mL Acetic Acid Concen...

Q: u have 100m oMHOn bker d yu begn oad NOH he te Consider the flowing nealten on HC N ld yo pet p ange...

A: In acid base neutralization, H+ or H3O+ ions are neutralized by OH- ions given by base.  We would us...

Q: To 0.360 L of 0.150 M NH 3 H is added 0.140 LL of 0.110 M MgCl 2.

A: first calculate the moles of every compound used n(NH3)= (0.150 mol/L )(0 .360 L) = 0.054 moles NH3 ...

Q: average K= 2.3116, Fe = 0.006 please help! 3. Suppose you had prepared Beaker D, where the initial c...

A: Given: Initial concentration of SCN- = 0.0012 M Initial concentration of Fe3+ = 0.006 M And the equi...

Q: a) Sketch the Lewis structure and name the molecular VSEPR shape for CCl4 b) What is the hybridizat...

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Q: What is the percent ionization of a 0.56 M solution of C6H5COOH with Ka of 6.5x10-5?

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Q: Which of the following molecules contains at least one atom that has less than a complete octet (exc...

A: Given,  Which of the following molecules contains at least one atom that has less than a complete oc...

Q: Match each species with the correct bond order according to MO theory. BC- 1, 0.5 BN+ 2, 1 FNe 3,...

A: According to MO theory the Bond order is defined as the number of covalent bonds in a covalent molec...

Q: 3. Which of these two molecules will have a higher boiling point? Explain your choice. a) NH; and H;...

A: There are various type of intermolecular forces present in the molecules such as hydrogen bonding, v...

Q: A 50.0 ml of 0.02 F ammonia solution is added to a solution containing 0.004 g Ni2+, 0.003 g Mn2+, a...

A:     For the original compound, formal concentration is the same as initial molar concentration.

Q: Bb Microso x I Bb Emailin x Bb CHEM 2 X Bb CHEM 2 X с C Expert X b My Que x + Content x Take Te X Wi...

A:

Q: 1. Consider the reaction below. Co(H2O),* (aq) + 4 CF (aq) = COCL (aq) + 6 H20 (1) The equilibrium c...

A: kc is the ratio of  product of concentration of products raised to their stoichiometric coefficient ...

Q: (1) What is the pH of a solution that is 0.371 M carbonic acid (H2CO;) and 0.350 M sodium bicarbonat...

A: 1.)  a.) In the given buffer solution , there is acid H2CO3 and sodium salt of its conjugate base , ...

Q: consider the following exothermic reaction at 0.00 °C and 1.00 atm Se04 (g) Se(g) + O2 (g) , Kc = 2....

A: We have find out equilibrium constant of oxygen gas and value of Ko for this reaction.

Q: During a reaction, reactant molecules are consumed while product molecules are formed. true or false...

A:

Q: 3. A 50.0 ml of 0.02 F ammonia solution is added to a solution containing 0.004 g Ni?. 0.003 g Mn. a...

A: Note: As per our company guideline we can answer only three subparts. Kindly repost the question men...

Q: How many liters of CO2 are produced in the fermentation of 325 grams of glucose? C6H12O6 - 2C2H5OH ...

A: Detail mathematical calculation to find out the volume of CO2 is shown below

Q: 5. A scientist has a mixture of two peptides, A and B, and wants to separate them using ion exchange...

A: (a)   The resin is positively charged, i.e., anion-exchange resin.   So, we need a buffer where both...

Q: What is the total number of moles of solute in 0.705 liters of a 1.21 M solution of NaCl? mol

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Q: Solutions conduct electricity, if there are charged particles or ions present. Our body contains ion...

A: An electrolyte imbalance can occur if the body has too much or too little water. Electrolytes are mi...

Q: a. If the mixture is dabbed onto chromatography paper that was then placed into a polar solvent, ran...

A: Greater the electronegativity difference between the atoms, greater is the polarity.

Q: A 10.00 mL sample of 1.20 M HNO2 (analyte) (pKa = 3.34 and Ka = 4.57x10-4) is titrated with 1.20 M N...

A: Given,  A 10.00 mL sample of 1.20 M HNO2 (analyte) (pKa = 3.34 and Ka = 4.57x10-4) is titrated with ...

Q: Part A The allowed energies of a simple atom are 0.00 eV, 4.00 eV, and 6.00 eV. An electron travelin...

A:

Q: When monitoring a reaction, the initial temperature of the reaction is 29 ºC, it rose to 57ºC and th...

A: What is the overall temperature change ?

Q: excess oxygen in a bomb calorimeter. The calorimeter, which alone had a heat capacity of 2.67 kJ/oC ...

A: Temperature difference (□T ) = 27.95 - 24.32 = 3.63 °c Mole(n) = 1.45 /60 = 0.0242 mol  Using energy...

Q: a.) C+ 2H2 = CH4 From the equations: 1. C+ 02= CO2 AH = -393.51 kJ 2. H2 + % O2 = H20 AH = -285.83 k...

A: Law of heat summation  When a reaction takes place by more than one step, the overall enthalpy of th...

Q: Calculate the concentration of PCI5 in the given reaction at equilibrium at 78C. PC|3(g) + Cl2(g) PC...

A: Given- PCl3+ Cl2 <->PCl5 Kc = 3.572 × 104 At equilibrium - [PCl3] = 0.302 M [Cl2] = 0.226 M  

Q: The value of ΔH° for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surround...

A:

Q: A 200 ml of 0.05 F hydrogen sulfide solution is added to 25 ml 1.5 Facetic acid solution. Compute th...

A: Required constants:  

Q: A sample of aluminum metal absorbs 9.86 J of heat, upon which the temperature of the sample increase...

A:

Q: Consider the reaction: C(s) + H2O + heat (double arrrow) CO(g) + H2, what will happen when decrease ...

A: Given,  the reaction:  C(s) + H2O ⇔CO(g) + H2  When temperature decreases the reaction will shift to...

Q: metal, or metal. Representative element (main Transition metal Inner-transition metal group element)...

A: Representative element ( main group element) - Se, At, Ra

Q: Question 4 Calculate the wavelength of visible light (in nanometers) that has a frequency of 6.831 x...

A: We are given : Frequency of light = 6.831 * 1014  Hz

Q: In the titration of 25.0 mL of 0.1 M CH3COOH with 0.1 M NaOH, how is the pH calculated after 25.0 mL...

A: 25 mL of 0.1 M CH3COOH is titrated with 25 mL of 0.1 M NaOH solution. Here, we have to identify how ...

Q: Which is NOT a factor that affects retention time? I. the pressure used II. The nature of the statio...

A: the retention time will vary depending on: the pressure used (because that affects the flow rate o...

Q: Determine equilibrium concentration of NOCI in the reaction given the following initial concentratio...

A: Given :  Kc  = 4.601 x 104  [NO] = 0.300 M [Cl2] = 0.500 M

Q: Acetic acid: k1.75x10 Ammonia: k=1.8x10s Hydrofluoric acid: 7.2x10+ Hydrogen sulficde: ke5.7x10 kaa1...

A: #2:  For acetic acid, CH3COOH(aq), Ka = 1.75*10-5  For hydrogen sulfide, H2S, Ka1 = 5.7*10-8 , Ka2 =...

Q: Given the schematic diagram of the HPLC process, Identify teh marked part. solvent reservoir A signa...

A: HPLC : HPLC means High performance liquid chromatography .  

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.