Consider Palmitic acid C16H32O2, a common fatty acid used in the manufacture of soap. A solution of palmitic acid is prepared by mixing 112 g palmitic acid with 725 mL of benzene C6H6. The density of the resulting solution is 0.902 g/mL. Palmitic acid (molar mass = 256 g/mol and density = 0.852 g/mL); Benzene (molar mass = 78 g/mol and density = 0.879 g/mL)   What is the mole fraction of the solvent?

Q: 2) Calculate the molarity of a solution made by dissolving 12.5 grams of Na₂CrO4 in enough water to…

A: The number of moles of solute present in 1 L of solution is called as molarity(M)  Or…

Q: How would you prepare 40.00 mL of 0.250 M sugar solution (C6H12O6) from a stock solution that is…

A: Given, M1 = 0.250 M V1 = 40 mL M2 = 1.25 M V2 = ?

Q: 250.0 mg of copper(II) sulfate pentahydrate (CuSO4•5H2O, 249.69 g/mol) was dissolved in water to…

A: Since mass of CuSO4•5H2O used = 250 mg = 0.25 g              (since 1 g = 1000 mg) Hence moles of…

Q: A sample of ultrapure silicon was reacted with excess oxidizing yielding SiO₂. After proper…

A: Given that -  Mass of Silicon dioxide SiO2 =  3.1754 g  Percentage of ultrapure silicon = 99.98%…

Q: A 30.7 g sample of a mixture of KNO3 and Mg(NO3)2 is treated with an excess of aqueous Na2CO3.  All…

A: Reactions between two salts in which metal ions exchange their anionic radicals is termed as double…

Q: What is the molarity of a barium chloride solution prepared by dissolving 9.9 grams of BaCl2•2(H2O)…

A: Molarity = (Mass/molar mass)(1000/V(ml)).Mass = 9.9g.Molar mass = 244.26g/mol.Volume = 151.0ml.

Q: A 1000 mL sample of seawater was found to have contained 40 ?g of Hg2+ ions. What is the…

A: This question is related to stoichiometry. In this question, volume and density of seawater sample…

Q: Calcium Chloride CaCl2 has a molar mass of 110 grams per mole. 11.0 grams of CaCl2 dissolved in 500…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 1) Use the reaction: 2AgNO3(aq) + H2SO4(aq) → Ag2SO4(s) + 2H2O(l).   What volume (in L) of 2.176 M…

A: 1) Recall the given reaction,                                The concentration of the  solution =…

Q: A sample of 7.89 g of Mg(OH)2 is added to 24.6 mL of 0.190 M HNO3. How many moles of HNO3 are…

A:

Q: In a neutralization reaction, 50.00 mL of 0.8500 M phosphoric acid reacts with 2.500 g of magnesium…

A: The answers to the first three questions can be given as - Given Data -

Q: 243 ml solution of aqueous iodine is prepared by dissolving iodine crystals in water. a fifty ml…

A: The balanced reaction is as follows: H3AsO3(aq) + I2 (aq)+H2O (l)→2I-(aq)+H3AsO4(aq)+2H+(aq) Thus 1…

Q: To measure the amount of calcium carbonate (CaCO3) in a seashell, an analytical chemist crushes a…

A:

Q: 1.) If 6.0 grams of CaCO3 reacts with excess HCI, what mass of water should be formed? The balanced…

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: What is the molarity of C6H12O6 in an aqueous solution that is prepared by dissolving a 25.91 g…

A: First, we need to calculate the mass of pure C6H12O6 in the sample. Since the sample is 81.0%…

Q: What mass (g) of MgCl2 is required to make 58 mL of 0.41 M MgCl2 (aq) solution

A:

Q: 1. A sample of ultrapure silicon was reacted with excess oxidizing yielding SiO₂. After proper…

A: Given : Weight of SiO2 precipitate = 3.1754 g Purity of ultrapure silicon = 99.98%

Q: Write the balanced neutralization reaction that occurs between H2SO4H2SO4 and KOHKOH in aqueous…

A: Answer: When acid and base solutions are mixed then water and salt forms as a product and lots of…

Q: A mixed with extraneous matter sample containing aluminum (Al) weighs 1.35 g. the sample a was…

A: Wt. Of Sample = 1.35 g Mass of Al2O3 ppt. = 255.00 mg = 255 * 10-3 g Molar Mass of aluminum = 27.00…

Q: A powder contains FeSO4·7H2O (molar mass = 278.01 g/mol) among other components. A 3.200-g sample of…

A: Answer:The question is based on the concept of gravimetric analysis and Stoichiometric Calculations.…

Q: Payalben

A:

Q: A mixture with a total mass of 3.12 g contains sucrose (C6H1206, 342.30 g mol-1) and ethyl alcohol…

A: Answer is explained below.  Given that, volume of CO2 = 3.04 L.  Pressure of H2O = 42.20 mm Hg =…

Q: You have a concentrated solution  of 5.00 M NaOH.  If you dilute 395.2 mL of this solution with…

A:

Q: 2.) Five standardized dilutions of aqueous lead(11) chromate solution were prepared by adding a…

A:

Q: Manganese commonly occurs in nature as a mineral. The extraction of manganese from the carbonite…

A:

Q: A student carried out the synthesis of aspirin as described using 3.00 g of salicylic   acid and 6.0…

A: When salicylic acid and acetic anhydride react, there will be the formation of aspirin and acetic…

Q: 2NaCl (aq)+ 2H₂O(1)→ H₂(g) + Cl₂(g) + 2NaOH(aq) 19. An aqueous solution of NaCl gives H₂(g), Cl₂(g),…

A: Answer:Number of moles of any specie in a solution is always equal to the product of its molar…

Q: If a chemist mixed 100.00 mL of dichloromethane (CH2Cl2) which has a density of 1.33 g/mL and…

A:

Q: A solution is prepared by dissolving 3.0 g iron(II) chloride (MW=126.8 g/mol) with 75.0 mL of water.…

A: Solution Molar concentration is that the most convenient technique of expressing the concentration…

Q: Aspirin can be prepared from salicylic acid (C7H6O3), which has a molar mass of 138.12 g/mol, and…

A:

Q: Consider Palmitic acid C16H32O2, a common fatty acid used in the manufacture of soap. A solution of…

A: The formula used to find out the volume and strength or concentration in the case of volumetric…

Q: Solution A is 0.2400 M Ca(NO3)2(aq). Solution A is diluted by a factor of 3 to form Solution B.…

A: The reaction taking place is  3As2O3 + 4NO3- + 7H2O + 4H+ → 6H3AsO4 + 4NO Balancing explanation :…

Q: What volume (in mL) of a 2.60 M solution of CH₃CH₂CH₂OH must you add to a 1.00 L volumetric flask so…

A:

Q: Alcohol levels can be determined by reaction with dichromate (breathalyzer). C2H5OH(l) + 2…

A: The question is based on the concept of quantitative analysis . we need to calculate PPT of ethanol…

Q: If 44.97 mL HCl = 43.76 mL NaOH, and if 49.14 mL NaOH neutralizes 0.2162 g of KHC2O4.H2C2O4.2H2O,…

A: Acid and base react with each other forming salt and water. This reaction is termed as…

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.