3. A large balloon is in a room that is 754 mm Hg and 23 °C. ||| a. If the balloon contains 2.00 L of helium, how many moles of helium are in the balloon?" b. If I untie the knot and release some gas until only 0.25 g of helium remains and then retie the knot, what is the new volume of the balloon? (Assume the temperature and pressure from the beginning of the problem did not change.)

Q: How many moles of carbon dioxide are produced when 14.1 g of HF are reacted with an excess amount of…

A:

Q: (b) Determine how the reaction rate varies with substrate concentration. Rate increases substrate is…

A: We have to tell how the rate of a reaction varies with the substrate concentration. Introduction:…

Q: How many moles of carbon dioxide are produced when 16.1 g of HF are reacted with an excess amount of…

A:

Q: Part B Redox titrations are used to determine the amounts of oxidizing and reducing agents in…

A: Given  Concentration of H2SO4 = 1.50M Volume of H2SO4 =17.2 mL Volume of KOH = 90.0mL

Q: Calculate the theoretical yield for the dehydration of 3.0 mL cyclohexanol. The molar mass and…

A:

Q: In the following gas phase reaction, what is the effect on the direction of the reaction if more SO…

A: Le Chatelier's principle: According to the Le Chatelier's principle when a change in concentration…

Q: tistical calculations d- bias 7)The mass of AgNO (s)( Fw 1-69.87g/mol) needed to prepare 0.5 L of…

A: 7. Given,Volume of AgNO3 solution = 0.5 LConcentration of AgNO3 solution = 0.0500 MRequired,…

Q: 11. sodium phosphide 12. diphosphorus pentoxide 13. potassium nitride 14. sodium oxide 15.…

A: -> Ionic compound is formed due to attraction of cation and anion . -> Ionic bond  is formed…

Q: What is the concentration of K+ in 0.15 M of K₂ S? Express your answer to one decimal place and…

A: Question 1 --> Answer          0.3          M         Value       Units

Q: b. Circle the compound with the smaller (weaker) lattice energy and give two reasons why: Reason #1:…

A: The given two compounds are Al2O3 and FeO. Identify the compound with weaker Lattice energy with…

Q: 3. Complete the following nuclear equations and identify X in each case: a) 153135→ Xe54135+X c)…

A: These are nuclear reactions

Q: a) 0.01547 1) For the following sets of data 0.1065, 0,1991, 0.1016, and 0.1018. The Standard…

A: Error in chemistry is defined as the difference between the true result and the measured result. In…

Q: Which compound has the highest melting point? O CH4 O MgCl₂ O HF OC (s, diamond)

A: The compounds given are CH4, MgCl2, HF and C(s, diamond) .

Q: Identify the compound in each pair that has the higher melting and boiling points. Explain why each…

A:

Q: General Chemistry I Laboratory Manual, 2021 Revision 2) Calculate AH for the reaction below using…

A: Hess's law state that the overall change in enthalpy is given by sum of all changes independent of…

Q: The volume of a gas is ___________ proportional to its temperature as long as the pressure remains…

A:

Q: 1.4 Calculate the theoretical potential at 25°C needed to initiate the deposition of Tl₂O3 from a…

A:

Q: If [OH- ] is 2.45 x 10-10 M, what is [H3 O+ ]?

A:

Q: The image below shows the reactions of the citric acid cycle. Label the reaction types on the…

A: The citric acid cycle is the cycle which represents release of energy through series of chemical…

Q: 11 12 If you try to dissolve 1500 g of NaNO3 into 1 kg of water at 50° C, how much of the 1500 g…

A: We know, solubility of a substance is the measure of amount of solute dissolved per unit of solvent.

Q: Thermoset polymers are usually Group of answer choices crystalline amorphous a mixture of…

A: A polymer is a class of synthetic substance composed of very large molecules, which is called…

Q: What reagents are necessary for the following transformations? ⁰- - (c) CH₂Br one. H (b) (d) -OCH₂…

A: For transformation, one should has good knowledge of reagents. Such as for transformation from C=O…

Q: A solution is made by combining 30 mL of acetone and 75 mL of water. Solve  for the concentration (%…

A:

Q: In the enzymatic activity assay performed for malate dehydrogenase, an absorbance of 0.6 (measured…

A: Answer for the question is given below : False

Q: H3PO4(aq) + 3 NaOH(aq) → 3 H₂O(l) + Na3PO4(aq) How, much water is produced when 0.0320 g of…

A: Mole can be defined as a standard unit for measuring large quantities of very small entities such as…

Q: What is the major product of the reaction below? 1) NaOMe 2) H₂O O OO A B C OH (A) OMe HOLON (B) OMe…

A: Given epoxide to be open in basic medium..which goes via SN2 mechanism..

Q: How many stereoisomers are possible for this molecule? 08 16 02

A: Chiral carbon is a carbon atom which are attached with four different groups

Q: At 25 °C, what is the hydroxide ion concentration, [OH−], in an aqueous solution with a hydrogen ion…

A:

Q: An element X has mass number 35 and number of neutrons 18. Write atomic number and electronic…

A: We know Mass number= Number neutron+ Number of proton The atomic number is basically the number of…

Q: At pH 7.0, the net charge on the peptide -Ala-Gly-Glu-Pro- would be, a. -2 b. -1 c. 0 d. +1 e. +2.…

A: we have to determine the net charge on the given peptide

Q: 3. What is the density of Ar gas that is stored at 756 mmHg and 280 K?

A: Density is equal to weight of substance divide by volume of solution

Q: Calculate the standard reaction free energy (AGO) for the following unbalanced redox reaction in…

A: Here we are required to find the not only the cell potential of the given electrochemical reaction…

Q: Do both ionic solutes and polar solutes change osmolarity of a solution, or can non-polar solutes…

A: Osmolarity is the concentration that is usually expressed in terms of number of solute particles in…

Q: How much heat (in kJ) is released in converting 1.00 mol of water as a gas at 105°C to ice at…

A: Answer:- This question is answered by using the simple concept of calculation of heat change using…

Q: What volume of carbon dioxide (in L) will 3.10 g of antacid made of calcium carbonate produce at…

A: Given, Mass of CaCO3 = 3.10 g. Temperature = 370C = (37 + 273) = 310 K. Pressure = 1.00 atm.

Q: EXERCISE 6 Calculate the rotational contribution to the molar sum of states, q, for the HD gas at 64…

A:

Q: 16. QUESTION 15 The nuclear reaction shown below is an example of what type of process? Th→ Rn+ He…

A: When a alpha particle emits then atomic number is reduced by two number and atomic mass is reduced…

Q: Hydrogen atom abstraction by a bromine radical in bromination of an alkane would be fastest with?

A: We have to answers the following questions. Introduction: During radical bromination, a carbon…

Q: 3) Which of the following is a weak acid? A) H3PO4 B) HNO3 C) NH3 D) OH-

A: Acidity of a acid depends on how much H+ ions it produces after dissolving in water.

Q: In general, Please explan how to get > Condition No inhibitor max Thus, the y-intercept is equal to…

A: The Lineweaver-Burk equation is given as: 1V= KMVmax1S +1Vmax where V represents the reaction speed,…

Q: fischer esterification:  5.4mL of isopentyl alcohol, molar mass 88.15g/mol:   8.5mL of acetic…

A: Given that the Isopentyl alcohol is the limiting reactant. Volume  of isopentyl alcohol is 5.4 mL

Q: At a unspecified temperature we place 0.940 mol of pure SO3 is placed in a evacuated 1.00-L…

A:

Q: (f) -C=C-CH3 H₂, Ni

A:

Q: Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) +…

A:

Q: The flask contains 10.0 mL of HCl and a few drops of phenolphthalein indicator. The buret contains…

A:

Q: For both circumstances (reversible and irreversible) what is the change in enthalpy dS for the gas,…

A: To calculate the change in entropy for the gas and the surrounding and the universe for both the…

Q: How would I convert this answer to nm?

A: Dimensional analysis is used to convert a physical quantity given in one type of unit to some other…

Q: For the reaction shown below, 2.00 g of 4- chloroacetophenone, 10.0 mol of sodium broohydride, 3…

A:

Q: Which of the following is a conjugate acid/base pair? A) H₂PO, PO 3- B) H₂PO, PO 3- C) HPO 2, PO 3…

A: There are several theories to define acid or Base.  Here we are required to find the conjugate acid…

Q: 11. One loss mechanism for ozone in the atmosphere is the reaction with the HO₂. radical: HO₂ (g) +…

A:

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.