An 86.04 g sample of H2SO4 is 91.22% pure. What is the mass of pure H2SO4 present in the sample?

Q: in the posted lecture notes! (1 element in 2 typeś of c.p's) Mark x for all that may apply: Pure?…

A: Pure substance: A pure substance is a sample of matter with both definite and constant composition…

Q: 8.* A4.00 gram sample of a hydrate of nickel(II) bromide loses 0.793 grams of water when heated.…

A: The question is based on the concept of experimental chemistry. we have to calculate the empirical…

Q: Which of the following shows a correct setup? O1.45 mol Ca x- 40 g Ca X1 mol Ca O1.45 mol Ca x Са хт…

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Q: A 2.45 g sample of magnesium completely reacts with oxygen to form 4.06 g of magnesium oxide. Use…

A: Given : Mass of Mg = 2.45g Mass of MgO = 4.06g

Q: Use the standard entropy data to determine the change in entropy for each of the reactions listed (…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: An electric current is passed through 60.0 mL of water (H2O). This converts the water into 53.33 g…

A: Given  Volume of water = 60 mL  Mass of Oxygen  = 53.33 gram Mass of hydrogen gas  = 6.67 gram…

Q: A molecule has a mass of 4.65 x 10^-23 g. Provide two possible chemical formulas for such a…

A: Given  mass of 1 molecule = 4.65 x 10-23 g we know  mass of 1 molecule = 1 mole  1 mole = 6.022 x…

Q: 3. A sample of sugar, C.H12O6, has a mass of 90.0 g. It has the same number of molecules as A) 45 g…

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Q: 1) Mg, Et,0 2) H20 Br LHO Но. но

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Q: A 69.56 g sample of SOCI2 reacts with 13.93 g of CO2 to form SO2 and CCI4. 2 SOCI2 (1) + CO2 (g)…

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Q: A sample of trifluoroacetic acid, C2HF3O2, contains 33.733.7 g of oxygen. Calculate the mass of the…

A: The molar mass of oxygen is 15.999 g/mol, so 33.7337g of oxygen converts to 2.10 moles of oxygen.…

Q: D* (aq) + CO,-(aq)→ (s) +3H;O(1) HCI (g) + NH3 (g) → NH,CI (s) 2H2S(g) +302(g) → 2H,0(g) + 2SO2(g)…

A: Equation first :1 )  number of molecules of products is  more than that of reactant so entropy is…

Q: Analysis of a 31.7 g sample of water revealed a mass percent for lead of 3.3%. Calculate the number…

A: Analysis of 31.7 g of water was done and the mass percentage of lead was found to be 3.3%,

Q: Arrange each group in or-der of increasingstandard molar entropy (S°). Explain

A: Entropy is the major of disorderness or randomness.so a gaseous species will have more randomness or…

Q: Sterling silver contains 925 parts silver and 75 parts copper by mass. What is the percent silver in…

A:

Q: On average, people use one teaspoon (2.5 g) of instant tea to make a 8-oz glass of ice tea. The…

A: 1 oz of iced tea contains 10 mg of caffeine.Therefore, 8 oz of iced tea contains 80 mg (0.08 g) of…

Q: Cu20(s) -170.7 92.4 CuO(s) -156.1 42.6 Cu(s) 33.2

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Q: a. b. C. d. 'Н CI 1. BULI, -70 °C to +20 °C 2. H₂0 1. BuLi, -70 °C to +20 °C 2. H₂0 NMe2 OMe NH3 NH3…

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Q: Mg + N2 → v Mg3N2 v Ca(NO3)2 + v Na2SO4 v Caso4 + v NANO3 v Fe2(SO4)3 + КОН — v K2SO4 + v Fe(OH)3 v…

A: Solution- 1.Balance chemical reaction- Zn + I2 - - - >ZnI2 2.Balance chemical reaction- 3 Mg + N2…

Q: A student conducts an experiment using an unknown hydrate and obtains the following data: Crucible…

A: Answer:- this question is answered by using the simple concept of determination of empirical formula…

Q: 9.31 g is the same mass as O 93.1 cg O 9310 mg O 931 kg 0.0931 dg O 931 mg

A: 1 cg = 10-2 g93.1 cg = 93.1 ×10-2 g93.1 cg = 0.931 g   1 mg = 10-3 g9310 mg = 9310× 10-3 g9310 mg =…

Q: For each reaction, predict the sign and find the value of ΔS°:

A: Given:-                     a    3NO2g +H2Ol  →2HNO3l +NOgb   N2g +3F2(g)   →2NF3gc   C6H12O6s +6O2g…

Q: A piece of aluminum foil measuring 11.20 cm × 6.00 cm × 0.566 mmis dissolved in excess HCl(aq). What…

A: Given, Aluminium foil measuring = 11.20 cm × 6.00 cm × 0.566 mm Density for Al = 2.70 g/cm3   Volume…

Q: Of the following, is the smallest mass. O 25 kg 2.5 x 10 mg O 2.5 x 105 pg O 2.5 x 10° fg O 2.5 x…

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Q: Write the chemical formula for each compound, and then calculate the amount in moles in each sample.…

A: Given: Mass of copper(II) sulfate pentahydrate = 78.1 kg

Q: A. 2NO2(g) → N2O4(9) B. Fe(s) → Fe(1) C. 302(g) → 203(g) D. 12(g) → 12(s) E. 2Fe(s) + O2(g) →…

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Q: Na,CO3(aq) + CaCl2(aq) → 2 NaCI(aq) + CaCO3(s)

A:

Q: A hydrated compound with a mass of 7.00g is heated. Its mass after heating is 5.63g. What is the…

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Q: C (s) + O2 (g) → CO2 (g) (b) N2 (g) + 2 O2 (g →2 NO2 (g) 2 NH3 (g) → N2 (g) + 3 H2 (g) (d) Cl2 (g) +…

A: Kp = Kc RT∆n

Q: Use the periodic table from an alternative universe below to answer the questions[ Syn A 1A 2A 8A…

A: The balanced reaction is: 2K3O+3VP→3K2P+1V3O2 Assuming that the molar mass of an element is twice of…

Q: The major product formed in the reaction is:

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Q: Tia has a sample of pure gold (Au). She weighed the sample and the result was 10.810.8 grams. Tia…

A: Number of atoms = number of moles x 6.0224 x 1023 Number of moles = Mass/molar mass

Q: Calculate the mass of 816 molecules of Cu(NO3)2.

A: We know , 1 mole of substance = 6.022 × 10²³ Molecules By using this relation , we can calculate the…

Q: Determine the mol H2O/mol CaSO4 if you have the following data to two decimal places (MM H2O =18.02…

A: Moles are ratio of mass to molar mass of substance.

Q: Use the following information to determine the mass of chlorine combined with the magnesium to two…

A: Given, mass of crucible = 35.1  mass of crucible and magnesium = 38.92  mass of crucible and…

Q: 2. A 0.9527 g sample containing only KCI and CaCl2 yielded 3.9802 g of dried Hg2Cl2. Calculate the…

A: Given the mass of sample = 0.9527 g Mass of dried Hg2Cl2 formed = 3.9802 g moles of Cl present in…

Q: Al,(SO.); Al: S: O: NaOH Na: 0: H: (NH,),S N: H: S: DO IT LIKE THE GIVEN EXAMPLE EXAMPLE 1) CuBr2…

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Q: B. C10H1604 compound? A. Mixing NaCl with H₂O C. Wax burning Q12. Which of the following does not…

A: Question no. 12 as specified.

Q: Write the expression for the equilibrium constant for each equation.

A: The equilibrium constant is the ratio of the product of the concentration of products to the…

Q: 4. A 3.5 M sample of hydrochloric acid, HCl, has a density of 1.45 g/ml. What is the mass % (wt/wt)…

A: Molarity of HCl = 3.5M = 3.5 mol/L density of HCl solution = 1.45 g/mL Assume total Volume of HCl…

Q: A drop of water has a volume of 50 uL. How many water molecules does it contain? The density of…

A: Given that,Volume of water = 50 micro L = 0.05mLDensity of water = 1.0 g/mLNow, you calculate the…

Q: 1 SIO2 Si 2 CaCl2 Са CI MnO2 Mn 4 Feo Fe 5 Fe2O3 Fe 6 H2O2 H 7 Сао Са 8 H2S S CIF3 CI F 10 NH4 H

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Q: What number of atoms of carbon is in 1.00-carat diamond

A: Number of moles = mass/molar mass  Molar mass of carbon = 12.0107 g/mol  1 mol carbon contains 6.022…

Q: t2 = 20.9 Hns typ = 0.603/K k = 0•693 O: 693/20.9 0.693 K = E a.033 br

A: Half life It is the time when the Concentration becomes half of the initial Concentration

Q: Analysis of a 40 g sample of water revealed a mass percent for lead of 3.23%. Calculate the number…

A: Percentage by mass of the substance in the solution mixture can be expressed as the ratio of mass of…

Q: The sample is a heterogeneous mixture. The sample is a compound. The sample is a pure element. The…

A: Solution has been provided in Step 2.

Q: Some students burned magnesium in excess oxygen, as described by the equation 2 Mg(s) + O2(g) --> 2…

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Q: Nitrogen ΔHof (kJ/mol) ΔGof (kJ/mol) So (J/mol K) N2 (g) 0 0 191.6 N (g) 472.7…

A: Given, Moles of N2 = 1.590mol

Q: An 8.53 mg sample contains 1.72 mg of phosphorous.  What is the mass percentage of phosphorous in…

A: Given  mass of phosphorous = 1.72 mg mass of compound = 8.53 mg  Formula : mass percentage of…

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.