A mixture of helium and oxygen gas is expanded from a volume of 16.0 L to a volume of 64.0 L, while the pressure is held constant at 43.0 atm. Calculate the work done on the gas mixture. Be sure your answer has the correct sign (positive or negative) and the correct number of significant digits.

Q: Which of these acts as a buffer in embalming fluids?     sodium lauryl sulfate     EDTA     la...

A:

Q: Compute the pOH, [H3O+], and [OH-] of soda drink if its pH value is 2.

A: Given  PH = 2  POH , [ H3O+] , [ OH- ] = ?

Q: 1. Five moles of a diatomic ideal gas are allowed to expand isothermally at 25°C from 0.020 to 0.100...

A: Given: moles, n = 5 Initial temperature, T1 = (25+273) k = 298 k Initial Volume, V1 = 0.02 m3 Final ...

Q: The osmotic flow of water from the hypotonic side of a SPM to the hypertonic side can be stopped by ...

A: In the above question it is given to choose how pressure factor depends on the flow of water from hy...

Q: 1. Calculate the change in the internal energy for a process in which a system absorbs 140 J of heat...

A: Given data :  1.  Heat absorb (Q) = 140 J  2. Work done (W) = - 85 J ( system does  work on system s...

Q: A chemist does an experiment where he expects to produce 6.669 moles of calcium phosphate, Ca3(PO4)2...

A:

Q: H* + H20 HO OH +

A:

Q: As the charge of the metal ion increases, what happens to the value of the activity coefficient? a...

A: From the extended Debye-Huckel equation, activity coefficient is related with the charge of ion as -...

Q: There are two steps in the extraction of copper metal from chalcocite, a copper ore. In the first st...

A:

Q: Suppose a 500. mL flask is filled with 0.70 mol of H, and 1.9 mol of I,. The following reaction beco...

A:           Number of moles of H2 = 0.7 mol           Number of moles of I2 = 1.9 mol    Volume of rea...

Q: Convert 400 grams of aluminum sulfate, Al2(SO4)3 to moles.

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

Q: crease or decrease 5. What is the reaction order of the reactant Ha in the equation Hz+ la - 2HI? a....

A: The order of reaction can be defined as the sum of the powers of the concentration terms of the reac...

Q: c) Outline a synthesis for compound G shown below starting with a 2- hydroxybenzylketone. G

A:

Q: A chemist prepares a solution of caiclum bromide (Calles) by measuring out 430. g of calcium bromide...

A:

Q: s nuclear equation?

A:

Q: give the chemical reaction of the given procedure: methyl salicylate + ethanol + 1M HCl -->  ?  +  ...

A: Methyl salicylate reacts with ethanol in presence of acid to form ethyl salicylate which again react...

Q: Q3 Write structures showing the specified configurations for each of the following compounds. Make y...

A: 3. A chemical structure determination includes  a chemist specifying one  molecular geometry, when f...

Q: Jennifer produces 11.9 grams of calcium carbonate, CaCO3 in a chemistry lab. How many moles was made...

A:

Q: 24. Which of the following arrangements is in order of increasing size? a) Ca2+ K* > Cl-> S2- b) S2...

A: Given,  Ca2+ , Cl- , K+ , S2-  the size of ions increasing order is :

Q: Data & Results: Complete the table. TRIAL 1 TRIAL 2 TRIAL 3 Wt. of vinegar sample Vol. of vinegar sa...

A: % CH3COOH = Normality of NaOH * Volume of NaOH * Eq wt of CH3COOH * 100 / Weight of sample

Q: 7. A gas expands against a variable opposing pressure given by p = 10/V atm; where V is the volume o...

A:

Q: 12.58 grams potassium hydroxide dissolved in 100 mL ethanol. What is the molality and (%w/w)?

A:

Q: Question 4: What is mixed melting point, and how can it be used to identify a compound. Provide two ...

A: In this experiment first we mix two compound in which one is known and another is unknown after that...

Q: The number of protons in an atom's nucleus defines the element.  True  False

A:                                   Answer The number of protons in the nucleus of an atom is its atom...

Q: Na,CO3(ag) + CaCl2(aq) 2 NaCl(aq) + CaCO3(s) Order the steps required to predict the volume (in mL) ...

A:

Q: While ethanol (CH,CH,OH) is produced naturally by fermentation, e.g. in beer- and wine-making, indus...

A: C2H4 (g) + H2O (g) <----> CH3CH2OH (g)   pC2H4 = 2.9 atm pH2O = 1.7 atm

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into gas...

A: Answer: This is the question based on the conservation of energy which suggests that energy can't be...

Q: Consider the reaction. А(аq) — 3 В (аq) Ke = 7.09 × 10–6 at 500 K If a 2.30 M sample of A is heated ...

A:

Q: A sample of CO2 occupies a volume of 14.87 liters at 140.5 kPa. What pressure in kPa would the gas e...

A:

Q: Give the importance of acid-base balance in the body.

A: Our body needs the right balance of acidic and basic (alkaline) compounds to function properly. This...

Q: Graph Analysis Individual Assessment Provide clear and concise explanation for each of the question ...

A: BC (2) and DE (4) represent phase transition of the system.

Q: molecular, ionic and net ionic equation

A:

Q: What is the pH of a solution containing 0.642 mol L-1 of a weak acid with pKA = 3.01 and 0.865 mol L...

A:

Q: Rank the samples of gas described in the table below in order of increasing average speed of the ato...

A:

Q: Draw the MOST stable conformational isomer of butane's Newman projection and briefly EXPLAIN its sta...

A: Please find your solution below : Conformations are the isomers that are formed due to slight change...

Q: The two hydrogen-like atoms Li2* and B4* are both in the n=4 excited state. How much more energy doe...

A:

Q: Find a reaction that is typically facilitated by a catalyst.  Write a paragraph (2 at most) detailin...

A:

Q: A positively charged particle in the nucleus of an atom is    A. an electron    B. a neutron   ...

A: A positively charged particle in the nucleus of an atom is given below

Q: meo Eto On

A: The molecular details along with IUPAC name has been provided.

Q: Phosphorus pentachloride decomposes according to the chemical equation PCI, (g) = PCI, (g) + Cl, (g)...

A:

Q: 6. In emission, a) an electron moves from an excited state to a lower energy state, and energy is re...

A: An electron can move from one energy state to another by absorbing or releasing energy depending on ...

Q: Ető NaoH Hzi D R ーoR of (R)

A: The substrate molecule taken is aceto acetic ester. The methylene group between the two carbonyl gro...

Q: Calculate the pH of a mixture containing 0.23 M HONH2 and 0.44 M HONH3Cl. (Kb = 1.1 × 10–8) What inf...

A:

Q: Using the attached molecule and synthesis, please redraw the molecule showing the stereochemistry at...

A:  

Q: Explain: hydrochloric acid is a strong acid while acetic acid is a weak acid.

A: Why HCl is strong and CH3COOH is weak ?

Q: At high temperatures, hydrogen chloride gas (HCI) partially dissociates into hydrogen gas and chlori...

A: Answer: In reversible reaction, initially the rate of forward reaction is higher than rate of backwa...

Q: A container of gas is initially at 0.64 atm and 25 °C. What will the pressure be at 92.6 °C?

A:

Q: What type of defense is occurring when mucin flows off the epithelium and carries pathogens with it?

A: In vertebrates, the interior epithelial surfaces are also covered with a mucus layer that protects t...

Q: ute solution of hydrochloric acid with a mass of 606.87 g and containing 0.31625 mol of HCl was exac...

A:

Q: Consider the following experimental data based on the inital rate method at 50 °C for the reaction: ...

A: To determine the reaction order of reactant A , we would plug the values of concentration and rate i...