8.278 x 10¯4 mol of an unidentified gaseous substance effuses through a tiny hole in 86.9 s Under identical conditions, 1.740 x 10¯4 mol of argon gas takes 81.3 s to effuse. What is the molecular weight of the substance? Express your answer in g/mol.

Q: Use the table below to identify the basic compound C: *Note that double indicator titration for each...

A: NaOH + HCl -----> NaCl  + H2O Na2CO3 + 2HCl  -----> 2NaCl  + CO2  +  H2O (pH = 8.3 at equivale...

Q: CH3-CH2-CH-CH-CH2-CH3 CH3 CH2 CH3

A: Here , we have to tell IUPAC name of the given Organic Compound 

Q: A student weighs out a 5.01 g sample of FeCl2, transfers it to a 250. mL volumetric flask, adds enou...

A: Given :-  Mass of FeCl2 = 5.01 g  Volume of solution = 250. mL  To calculate :-  Molarity of solutio...

Q: Decide whether the following molecules are mesocompounds. Draw the plane of symmetry

A: Where plane of symmetry or center of symmetry present that is meso compound.

Q: How much energy in units of J, is required to heat 71.7g of solid acetone from -156.3°C to -96.6°C. ...

A:

Q: Part A A gas nample has a volume of 4210 mL at 18 "C and 735 mmHg What is the final temperature, in ...

A:

Q: CH3CH2CI→C2H4 + HCI he rate constant at 745 K is 6.02x10 4 /s. The rate constant will be 7.22x103 /s...

A: Rate constant is directly proportional to temperature 

Q: Find the oxidation number for each element in the following substance. Br2  1. Br =

A: Given :- chemical formula of substance = Br2  To identify :- oxidation no. of Br in Br2

Q: Propose a synthesis of the compound shown below starting with benzene and any other acydic carbon co...

A:

Q: The following data are for the decomposition of dinitrogen pentoxide in carbon tetrachloride solutio...

A: The half-life of a reaction can be defined as the time at which the concentration or the amount of t...

Q: 1: A flask that can withstand an internal pressure of 2500 torr, but no more, is filled with a gas a...

A: As per our guidelines we can only solve first question. Please resubmit the other questions as next ...

Q: What is the pressure of CO2 (in atm) at 275.80 K, molar volume = 4 liter/mole, if B = – 0.053 liter/...

A: Detail mathematical calculation for pressure using virial equation of state is shown below

Q: 18-29. The measured pH of a 0.100 M solution of NHs(aq) at 25°C is 11.12. Calculate K, for NH3(aq) a...

A: Since you have posted multiple questions, we will solve the first one for you. Kindly post the other...

Q: B. Calcium carbonate (limestone) is a very insoluble ionic salt! Answer the following if you add a f...

A: If we add calcium carbonate  in well it doesn't react with water as it is insoluble  but if well has...

Q: If 3.21 mol of a gas occupies 56.2 Lat 44 °C and 793 torr, 5.29 mol of this gas occupies __________ ...

A: Given :-  Initial moles = 3.21 mol Initial volume = 56.2 L  Final moles = 5.29 mol  To calculate :- ...

Q: Decide the charge on each ion. write the correct WRITING FORMULAS & NAMING COMPOUNDS formula 2OL che...

A: Here we have to write the formula of ionic compounds and their IUPAC name.

Q: A 5.00 L tank at 3.7 "C is filed with 5.14 g of dinitrogen monoxide gas and 10.2 g of sulfur tetrafl...

A: Given mass of dinitrogen monoxide = 5.14 gram Given mass of sulphur tetrafluoride = 10.2 gram

Q: draw acid/bade titration curves for the following question Consider the titration of 100.0 mL of o.1...

A:

Q: the following exothermic reaction at equilib (s) + 2H2(g) S CH4(g). l happen to the concentration of...

A:

Q: Predict the major product(s) for each of the following thermal electrocyclic reactions. Justify your...

A:

Q: 13. Given the following thermochemical equation: Mge) + Clag MgCl, + 642 kJ (5) What is the AH for t...

A: Given- Mg + Cl2-> MgCl2 +642 kJ

Q: If calcium carbonate were slightly soluble in water, would your percent yield be higher, lower, or u...

A: What is the effect of solubility of calcium carbonate in water on percent yield. 

Q: Predict the product and balance redox reaction Solid cuprous sulfide is oxidized by hot conentrate...

A: In this question, we have to Predict the product and balance the redox reaction.

Q: Hb + C,H12O6 + NaOH + C3HŞN C44H42FEN,O4

A: Hb is C2952H4464N3248O812S8Fe4.

Q: 5(a) Use the standard reduction potentials at 25° C in Table 18.1 in Tro, Fridgen and Shaw, and calc...

A: Given,  Mn + Cd2+ → Mn2+ + Cd the standard emf E° of an electrochemical cell for the reaction is:

Q: 3. A 1.25-g sample of ammonium nitrate dissolves in water to make 35.0 mL of solution in an insulate...

A: Given,  Mass of NH4NO3 = 1.25 g  Volume of the solution = 35.0 mL  Initial temperature= Ti = 24.6 0C...

Q: Which best describes a neutral atom? Group of answer choices no protons and electrons more electrons...

A: Neutral atom Neutral Atom can be define as an atom having net electrical charge equal to zero. An at...

Q: The nutritional label on a bottle of soy sauce indicates that one serving (15 mL) of soy sauce conta...

A:

Q: 7. Calculate the number of grams of CO2 that are produced by heating 116.4 grams of magnesium carbon...

A: 60.72 gram of CO2 is produced from 116.4 gram of MgCO3.

Q: which significant information can be provide by the mass spectra? identity of the compounds molecul...

A: mass spectrometers can be used to identify unknown compounds via molecular weight determination, to ...

Q: Construct the expression for Kc for the following reaction. 3 NO(g) = N20(g) + NO2(g)

A:

Q: In preparation of cola, 2.50 mL of the original sample was taken and diluted to 100 mL resulting to ...

A:

Q: Calculate the actual dissolve oxygen (DO) at a downstream location of 1500 m in a river from a waste...

A: We have find out actual dissolve oxygen.

Q: Predict the products for each of the following reactions. Draw the transition state to show how the ...

A: Answer of the question is given below, 

Q: A HF/NaF buffer is prepared. NaOH is added to the buffer. Which species is consumed as a result of t...

A: When a HF/NaF buffer is prepared and NaOH is added to the buffer then, The hydroxide ions are consum...

Q: The rate constant for this first-order reaction is 0.0610s at 400 'C. A - products After how many se...

A:

Q: A water tower containing 4000 m³ of water that contained an initial concentration of free chlorine o...

A:

Q: How many grams of solid sodium cyanide should be added to 1.50 L of a 0.233 M hydrocyanic acid solut...

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Q: For an aqueous solution formed by mixing 2.50mL of concentrated HNO3 (15.6M) with 305mL of 0.500M NH...

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Q: Predict the product of reaction shown. fuming H,SO, SO,H so, он IV O II

A:

Q: Why do five grams of powdered iron react faster than a one-gram piece of solid iron?

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical reacti...

Q: The rock that consist of one mineral called mineraloids. * True O False The earth's crust divided in...

A: Mineraloids are naturally occurring solids that are not crystalline in nature. They may look like a ...

Q: A primary amine R-NH2 has pKb=5.15 at 25°C. A buffer solution is made by adding 1.27 moles of R-NH2 ...

A:

Q: gas (pure or mixture) 1 solute P/P(o) solvent c/c(o) pure solid or liquid

A:

Q: 2. Calculate the [I] (after dilution in the 50.00 mL flasks) for the four standard solutions you mak...

A: With dilution concentration of a substance decreases.

Q: For a CH,0 molecule, what is the internal energy predicted to be based on the classical approach for...

A: Internal energy (U)of a molecule is the energy it posses by virtue of its  Rotational state Vibrati...

Q: Acidic cations are conjugates of ____ bases, and basic anions are conjugates of ____ acids.

A: If weak base then it's conjugate acid is more acidic .If weak acid then it's conjugate base is more ...

Q: Leaves fallina from trees in Qutcimn kand in a stream, Weld they CCcumulale and dog the Clog the wat...

A: The dry leaf floats on water because it contains less starch when compared to fresh leaf .Thus the d...

Q: Consider the following standard reduction potentials: 2H* + 2e- → H2 Sn+2 + 2e → Sn Cd+2 + 2e- → Cd ...

A:   Decreasing order of Standard reduction potential (SRP) values is Sn > Cd > H+  The one whic...

Q: Acid rain harms both living and nonliving things in a variety of ways. What solution/s can you propo...

A: Acid rain, as described in the question, is harmful for both  living and nonliving things in a varie...

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.