Identify the following as a heterogeneous mixture, a homogeneous mixture, a compound or an element. For heterogeneous mixture enter HEM, for homogeneous mixture enter HOM, for compound enter C, for element enter E. [a] a yellow liquid that leaves behind a white crystalline after evaporation [b] spaghetti sauce with no visible flakes of spices [c] a yellow solid powder that melts into a yellow liquid that decomposes upon further heating [d] Acid Rain

Q: What volume of 0.28 M H2SO4 can be prepared by diluting 113 mL of 5.9 M H,sO,? L

A: Intial concentration = M1 = 5.9 M  Intial volume = V1 = 113 mL  Final concentration = M1 = 0.28 M…

Q: How many microliters of original sample are required to produce a final dilution of 102 in a total…

A: according to Dilution law initial = final  M1V1 = M2V2  final dilution = M2 / M1 =10-2  (given)…

Q: a.)1.21 M

A: 3.   The Molarity of saturated NaNO3 solution is 10.9 (M), at 25• C. The molar mass of NaNO3 is…

Q: A10g sample of a substance of unknown molar mass requires 40 mL of standard solution for titration;…

A: Volume of the standard solution = 40 ml or 0.04 L Let the concentration (M) of the standard solution…

Q: How many grams of 50% nitric acid and water should be taken to prepare a 15% nitric acid solution of…

A: Note : Instead of 15% nitric acid solution , there should be 15g nitric acid solution. Given: Mass%…

Q: 20. Calculate the final concentrations of the following aqueous solutions after each has been…

A: Answer-20 When the solution has been diluted, it changes the volume of the solution but moles of…

Q: You are asked to prepare a 1.000L solution of 45 M CHOs (glucose, molar mass 180 16 g/mol) in a lab…

A: The number of moles of glucose is calculated as shown below. The number of moles of glucose is 4.50…

Q: Assume that the only reducingagent present in a particular wastewater is If a25.00 mL sample of this…

A:

Q: **** (5) 3 Opper mctal (ind Concentad ted und aad be oonsis hange in , releare of lgas mredcolo…

A: Balanced equation is given by,

Q: The purple spheres represent particles of solute. Which compounds are represented in images…

A:

Q: A chemist needs 24 galons of a 30% acid solution. The solution is to be mixed from three solutions…

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

Q: Exercises ough solution through the tip The top of the solution should Balance each chemical…

A:

Q: The solubility of KNO; (in gr KNO; per 100 gr water) is 155 gr KNO; at 75 °C and 38 gr KNO; at 25…

A: The solubility of KNO3 is 155g in 100g of water at 75oC. Also, the solubility at 25oC is 38g in 100g…

Q: Express the concentration of acetic acid in both samples as % by mass of acetic per 100mL of…

A: A numerical problem based on quantitative analysis, which is to be accomplished.

Q: The volume of 13.7 M H2SO4 solution required to prepare 285 mL of 1.17 M H2SO4 is _________mL.

A: Here we have to calculate volume of H2SO4 needed to prepare 285 mL, 1.17M H2SO4 solution-

Q: Which of the following salts does NOT cause permanent hardness? (A Ca(HCO,). (B M8SO , © CaCl, (D…

A:

Q: اجابة قصيرة A12 (SO4) 3 at a N, What is the pare a solution n of 0.04 M in a i distilled water

A: Relation between normality vs Molarity  Normality = n • Molarity  Where : n is the n-factor for…

Q: Question 9 of 23 Write the balanced NET ionic equation for the reaction when aqueous aluminum…

A:

Q: A 25.0 mL volume of 0.0106 M KIO3 is pipetted into a 250-mL Erlenmeyer flask. The solution is…

A: Given, For KIO3 solution: Molar concentration of KIO3 solution = 0.0106 M = 0.0106 mol/L Volume of…

Q: What is the normality of a K,Cr20, solution prepared by dissolving 5.00 g of K2Cr20, in 200 mL of…

A: Given unbalanced equation is  Cr2O7 -2  +  SO3-2  →  Cr+3  + SO4-2  Balance the reaction 1 Cr2O7…

Q: For a 50ml beaker, 0.4532g of pure iron III oxide was weighed, to which 1 ml of a concentrated…

A: The objective of the question is to calculate the final concentration of the iron III cation…

Q: A 5.00 gram sample containing NaCl was treated with 50 mL of 0.1995N AgNO3 and required 10.45 mL of…

A: Here we are required to find percentage purity of NaCl.

Q: How many grams of solid sodium chloride NaCl are needed to prepare 525 mL of a 0.645 M aqueous NaCl…

A: Given: The volume of solution, (V) = 525 mL = 0.525 L. The molar concentration of the NaCl solution,…

Q: 25 mL of a bleach (NaOCl) sample is diluted to 500 mL. An excessive amount of KI is added to the 20…

A: The question involves estimation of sodium hypochlorite present in the given bleach sample . we do…

Q: A. Describe how you would prepare 300 mL of 0.500M NaCI from water and dry NaCl. b. How would you go…

A: The molarity is the concentration term which means the number of moles of solute dissolved in per…

Q: 3. The end point is the point where equal masses of reactants combine */^~²) 2-) O False True

A: 3)The endpoint in a titration is defined as the point at which the indicator changes colour.  Note:…

Q: If 20. g of AgNO, is available, what volume of 0.25 M AGNO, solution can be prepared? 1S Volume %3D…

A:

Q: Prepare 100.00 mL of a solution with ALL the following chemicals into together; CHEMICALS PROVIDED

A: We have to Prepare 100.00 mL of a solution

Q: A 5.00 ml aliquot of 0.250 M Pb(NO3)2- -i resulting solution? а. 5.00 M b. 0.0125 M С. 0.0119 M 1.…

A: Given, Molarity(M1) = 0.250 M Volume(V1) = 5.00 mL Final Volume (V2) = 100 mL

Q: Experiment 0.0782 5: Redox (Dichromate Titrations) 8 sample of Iron ore is dissolved in H,PO/H₂SO,…

A: Recall the given redox reaction,                    Cr2O72-  +  6 Fe2+  +  14 H+  →  2 Cr3+  +  6…

Q: The following steps were used to determine the concentration of acetic acid in vinegar. 1. Sodium…

A:

Q: Identify 2 sources of errors in each of the steps in making of a solution. Explain whether a…

A:

Q: 4.0050 g sample of chlorinated lime was mixed with enough water to make 1000 mL. A 100 mL sx of the…

A: Find the availble chlorine content of chloronated lime

Q: Determine the mass of solute (in g) contained in 500.0 mL of a 0.0274 M solution of CH3CH2OH. 9…

A:

Q: None

A: 30.Step 1: Calculate the percentage of S in ferrous ammonium sulfate (Fe(NH4)2(SO4)2·6H2O) using its…

Q: convert 0.750 moles of CuCl2 to mass in grams. b) 25cm3 of sodium hydroxide solution of unknown…

A:

Q: How to prepare these solutions?   250.0 mL 0.125 M stock Na2S2O3 solution from Na2S2O3·5H2O crystals…

A:

Q: 2.23 gr sample taken from a bleaching powder is dissolved and completed to 250 ml. Taken from here…

A: Answer:- This question is answered by using the simple concept of stoichiometry using balanced…

Q: series of iron standard solutions need to be made from a 40 ppm iron stock solution provided. For…

A: As we know , Moles the solute remains same on dilution but volume of the solution increases.…

Q: In the preparation of the NaCl stock solution, 19.9805g of the salt was dissolved in enough water to…

A:

Q: A sample containing NaCl, NaBr, & inert material weighs 1.000 g. Excess of AgNO3 gave a white…

A: Given data: Wt of NaCl, NaBr, & inert material = 1.000 g   Wt of AgCl and AgBr = 0.5260 g Wt of…

Q: Celery stalks that are immersed in fresh water for several hours become stiff. Similar stalks left…

A: Answer - Celery stalks that are immersed in fresh water for several hours become stiff. Similar…

Q: om/ilmn/takeAssignment/takeCovalentActivity.do?locator-assignment-take What is the molarity of the…

A: As we know ,   Moles the solute remains same on dilution but volume of the solution increases.…

Q: Determine how many grams of aluminum will be produced when 15 grams of sodium is placed in 150 mL of…

A: The moles of a substance in a given mass is calculated as: Number of moles=given massmolar mass…

Q: A sample weighing 3.458 g is dissolved and diluted to exactly 250.0 mL in a volumetric flask. A 50.0…

A: Given, A sample weighing 3.458 g is dissolved and diluted to exactly 250.0 mL in a volumetric flask.…

Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.