Obtain the molecular formulas of both compounds

Assignment Help Chemistry

Reference no: EM13774621

1 .A 1.345 g sample of a compound of barium and oxygen was dissolved in hydrochloric acid to give a solution of barium ion, which was then precipitated with an excess of potassium chromate to give 2.012 g of barium chromate, BaCrO₄. What is the formula of the compound?

a. Phenol, commonly known as carbolic acid, was used by Joseph Lister as an antiseptic for surgery in 1865. Its principle use today is the manufacture of phenolic resins and plastics. Combustion of 5.23 mg of phenol yields 14.67 mg CO₂ and 3.01 mg H₂O. Phenol contains only C, H, and O. What is the percentage of each element in this substance?

2.b.How many milliliters of 0.250 M KMnO4 are needed to react with 4.40 g of iron(II) sulfate, FeSO₄? (Hint: Volumetric analysis)

The reaction is as follows:

10FeSO₄(aq) + 2KMnO₄(aq) + 8H₂SO₄(aq)

5Fe₂(SO₄)₃(aq) + 2MnSO₄(aq) + K₂SO₄(aq) + 8H₂O(l)

3.Two compounds have the same composition: 85.62% C and 14.38% H.

a. Obtain the empirical formula corresponding to this composition.

b. One of the compounds has a molecular mass of 28.03 amu; the other, of 56.06 amu. Obtain the molecular formulas of both compounds.

4.a.For the given aqueous reaction, write the molecular and net ionic equations, including phase labels.

The neutralization of acetic acid by calcium hydroxide, both in aqueous solution

b.Balance the following oxidation-reduction reaction by the half-reaction method.

FeI₃(aq) + Mg(s) Fe(s) + MgI₂(aq)

5.a.One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide from a solution containing rhodium(III) sulfate according to the following balanced chemical equation:

Rh₂(SO₄)₃(aq) + 6NaOH(aq) 2Rh(OH)₃(s) + 3Na₂SO₄(aq)

What is the theoretical yield of rhodium(III) hydroxide from the reaction of 0.590 g of rhodium(III) sulfate with 0.366 g of sodium hydroxide? Show detailed work.

b. Using questions 40a, calculate the percentage yield ofrhodium(III) hydroxide, Rh(OH)3 ; given that the actual yield ofRh(OH)3 is 0.320 g.

Reference no: EM13774621

Questions Cloud

Would the man be able to recover money from clara : A man with a towel and windshield fluid rushes up to her car window and washes it, before giving her a chance to comment. He then insists that she must pay him for his work. Would the man be able to recover money from Clara in court based the th..

Enviromental law assesment : Which of the following is NOT an essential element of a successful environmental auditing program?

Advantages and disadvantages of plea bargaining : Distinguish between charge bargaining and sentence bargaining. Compare and contrast the advantages and disadvantages of plea bargaining

Determine the value required for any prescaling : A PWM is used in 8-bit mode to produce a signal with a 1 msec period and 60% duty cycle. Determine the value required for any prescaling and the values for the period and duty cycle registers. The E-clock is 24 MHz.

Obtain the molecular formulas of both compounds : What is the percentage of each element in this substance - Obtain the molecular formulas of both compounds.

Content analysis and statistical analysis : Describe your plans for analyzing your data (e.g., content analysis, statistical analysis, etc.) and your plans for how you will present your results.

Question regarding the merchandise inventory items : A company just starting in business purchased three merchandise inventory items at the following prices. First purchase $80; Second purchase $95; Third purchase $85. If the company sold two units for a total of $240 and used FIFO costing, the gros..

What is meant by the term due process of the law : What is meant by the term due process of the law? What does the term multiculturalism and how does it affect criminal justice

Converting from an erd to a table design : Converting from an ERD to a table design. Computer-aided software engineering applications that help improve the productivity of information systems professional working on large projects.

User Account

All Pages