A mixture of helium and neon gas is expanded from a volume of 58.0 L to a volume of 86.0 L, while the pressure is held constant at 78.0 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: The preparations of two aqueous solutions are described in the table below. For each solution, write...

A: Given table is :   

Q: Na Be nalt Nos Bea no NaNo3 Sodum BeNo3 Berylom Nihake B(POD [NO3] NäPo [PO4]3- Beryliun he Beat' Io...

A: Chemical formula comprises of cation and anion.

Q: CH CH3 ON CH3 HNO, CH HSO, .CH CH NO2

A: ->If electron donating group present then ortho ,para product is major. ->If electron withdraw...

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A: All the conversions are multi step synthesis . The synthesis are given below

Q: A chemist determines by measurements that 0.035 moles of iodine solid participate in a chemical reac...

A: Given moles = 0.035 mol

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A:

Q: What is the percentage of procaine HCI which will yield an isotonic solution with blood plasma? FD1%...

A: Applying for general formula           0.52-a/b

Q: Select the single best answer. Which of the following has more atoms: 3.13 g of hydrogen atoms or 17...

A:

Q: Prepare a 250-mL buffer with pH = 4.40 from solid reagents benzoic acid (C6H5COOH; M = 122.123 g mol...

A: We are asked to do calculations for a acidic buffer solution that contains a weak acid, benzoic acid...

Q: 1.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have...

A:

Q: You are given the two following reactions below. You must compare them and circle the one that is fa...

A: The functional group is a key constituent that furnishes the characteristic chemical reactions to th...

Q: What is the role of cation during ion-dipole interactions? A.  it distorts the electron distributio...

A: Ion dipole interaction: It is defined as the interaction between ion and a molecule with permanent d...

Q: 2. Aluminum bromide (AIBr3) and sodium hydroxide (NAOH) react to form aluminum hydroxide (Al(OH)3) a...

A: Given that aluminum bromide and sodium hydroxide are reacted to form aluminum hydroxide and sodium b...

Q: 1) NABH,, ELOH 2) H°, H,O

A:

Q: Given the standard heats of formation for the following compounds, calculate AH 208 for the followin...

A:

Q: 4- Titrimetric methods : are quantitative methods that are based on determining the mass of a pure c...

A: This question is related to titrimetric methods where a solution of a known concentration is used to...

Q: SO4 -two content in 7689mL of a water sample was precipitated as Na2SO4. The precipitated was filter...

A: The mass of the empty crucible is = 27.0234 g The mass of the crucible plus Na2SO4 is = 27.7708 g Th...

Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains Du...

A: heat flows from out of the flask means heat given out by the reaction and that heat is taken by the ...

Q: 12.45 What is osmosis? What is a semipermeable membrane?

A: Answer: Osmosis is a natural phenomenon and it found in plants where xylem sap travels across the pl...

Q: What volume (mL) of a concentrated solution of sodium hydroxide (6.00 M) must be diluted to 200 mL t...

A:

Q: Draw the structure of the product/s in each of the following rea Provide your final answers in the s...

A:

Q: Calculate the expectation value of the radius (r) at which you would find the electron if the H atom...

A:

Q: Why do the ability to separate and recover pure substances from mixtures is extremely important in s...

A: Purity is a necessity of scientific research.

Q: A solution is formed by mixing 50.0 mL of 9.8 M NaX with 50.0 ml of 3.8 x 103 M CUNO,. Assume that C...

A:

Q: taborane BgHg(s) burns vigorously in 02 to give B2031s) and H20(). Calculate AHxn for the combustion...

A: 2B5H9 (s) + 12O2(g) -----> 5B2O3(s) + 9H2O( l)  

Q: Calculate the E and identify the type of electrochemical cells of the following: (a) Ag|AgBr (a=0.10...

A:                                            EBr-/AgBr/Ag0 = 0.10 VECl-/AgCl/Ag = 0.22 V Anode:       ...

Q: Silver nitrate and aluminum chloride react with each other by exchanging anions: 3 AgNO3 (aq) + AlC...

A: Agno3 given 4.22 gram

Q: Mass of beaker 50.5g Mass of marble before reaction 3.0g Mass of marble after reaction 1....

A: Formula of marble-   CaCO3 Reaction of marble with HCl CaCO3 (s) + 2 HCl (aq) →CaCl2 (aq) + CO2 (...

Q: Given that pKa = 4.72 at 25 °C for HN3, what is the pH of 0.125 mol L-1 NaN3(aq) at 25 °C? What is t...

A: A question based on equilibrium concept that is to be accomplished.

Q: What is the Molarity of a hydrochloric acid solution that has a volume of 1800 mL and contains 441 g...

A:

Q: A nugget of gold with a mass of 521 g is added to 50.0 mL of water.  The water level rises to a volu...

A: Given that, Mass of gold=521g Volume of water=50.0 mL Volume after addition of gold into water=77.0m...

Q: Calculate the change in pH that results from adding 0.160 mol NaNO2 to 1.00 L of

A: Ka = 7.2 ×10-4  pKa = -log(Ka)  = -log(7.2×10-4) = 3.14 initially, weak acid HNO2 is present  So,  p...

Q:

A: Given that, w/v % = 0.85%  M.Wt = 58.5 g mol-1  Normality = ?

Q: Calculate the molar mass of a compound if 0.348 mole of it has a mass of 200.0 g. g'mol

A:

Q: 2 Cu, S s(s).-30.(g)-2cu,0(s)-250,(g) 2 Cu, O +2 SO, In the second step, copper(1) oxide and carbon ...

A: Given - 1-2Cu2S + 3O2 --> 2Cu2O + 2SO2  2-Cu2O + C -->2Cu +CO   

Q: When 0.7521 g of benzoic acid was burned In a calorimeter contalning 1,000. g of water, a temperatur...

A:

Q: The reaction between nitric eside (NO) and oxygen to form nitrogen dieside (NO,) is a key step in ph...

A: Given data,Mass of NO2 produced=3.21gData required;Molar mass of NO2=46g/molMolar mass of O2=32g/mol

Q: 1. Aluminum metal (Al) and hydrogen chloride (HCI) react to form aluminum chloride (AICI3) and hydro...

A: Given,  Al and HCl react to form AlCl3 and H2 gas , then  A. What is the balanced reaction = ? B. Ho...

Q: Solution A has pH of 3.20, solution B pH of 12.50, solution C a pH of 7.00, and solution D a pH of 4...

A:

Q: 8- Calculate the molar concentrations of the solute species in an aqueous solution that contains 285...

A:

Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic i...

A: ★ F2 :  F2 is homonuclear diatomic molecule which is non polar . A homonculear diatomic molecule F2 ...

Q: How many grams of dry NH,Cl need to be added to 2.30 L of a 0.700 mol L solution of ammonia, NH3, to...

A: Given Data : 

Q: le sure to answer all parts. he AG for the reaction IHg) + Ig(g) 2g) 2.60 k/mol at 25°C. la one expe...

A: H2(g) + I2(g) <==> 2HI (g) ∆Go = 2.60 kJ/mol T = 298 K  

Q: What kind of solvent ingredients is widely is usually used in mouthwash, perfumes  and spray A. Eth...

A: Solution is made up of two components: solue and Solvent. Component which is present in major amount...

Q: what is the number of moles of calcium carbonate reacted?

A:

Q: Which of the following occurs when reactants are removed from a chemical reaction in solution or the...

A: According to lechatliers principle when a system at equilibrium is subjected to a stress (change in ...

Q: Enter your answer in the provided box. Calculate the standard entropy change for the following react...

A:

Q: Save What is the theoretical yield of chromium that can be produced by the reaction of 40.0 g of Cr2...

A: Weight of Cr2O3 = 40.0 gm Weight of Al = 8.00 gm  

Q: reaction was monitored as a function of time: AB→A+B A plot of 1/[AB] versus time yields a straigh...

A: AB-->A + B  Slope = 0.052 mol.L^-1.s^-1 Initial concentration = 0.52 mol.L^-1  Final concentratio...

Q: Increasing the temperature of the water by 5 °F would have a significant impact on cooking times. As...

A: Desired boiling point of water = 217 oF Volume of water/solution = 4 quarts The question requires to...

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.