chemistry science

/in /by

AcademicWritersDen.com boasts a team of highly skilled and experienced writers who specialize in various academic fields. The company carefully selects its writers through a rigorous screening process to ensure that they possess the necessary qualifications and expertise. Whether it’s an essay, research paper, or any other homework assignment, students can rely on AcademicWritersDen.com to connect them with professionals who have an in-depth understanding of the subject matter. This ensures that the work delivered is of high quality and meets the academic standards set by educational institutions.

PLEASE JUST CHECK THE ATTACHMENT IN THE FILES.

Why is oxygen reduced in the reaction of hydrogen with oxygen to make water?

  1. Oxygen pulls electrons toward itself.
  2. Oxygen pushes electrons toward the hydrogens.
  3. Oxygen absorbs a proton.

Which term describes the following process? 2Fe(s) + O2(g) + 2H2O(l) → 2Fe(OH)2(s)

4Fe(OH)2(s) + O2(g) +2H2O(l) → 4Fe(OH)3(s)

  1. salt hydrolysis
  2. electrolysis
  3. corrosion

The half-reaction method is particularly useful for balancing redox equations.

  1. true
  2. false

A spontaneous reaction causes current to flow in an electrolytic cell.

  1. true
  2. false

Which of the following chemical equations represents an oxidation-reduction reaction?

  1. Mg(OH)2 + 2HCl → MgCl2 + 2H2O
  2. BiCl2 + Na2SO4 → 2NaCl + BiSO4
  3. CH4+2O2→CO2+2H2O

Identify the products formed in the net reaction of the electrolysis of water.

  1. liquid hydrogen and oxygen gas
  2. liquid oxygen and hydrogen gas
  3. hydrogen gas and oxygen gas

The gas produced at the cathode in the electrolysis of brine is _________.

  1. chlorine
  2. oxygen
  3. hydrogen

____ 8.

____ 9.

____ 10.

____ 11.

____ 12.

____ 13.

____ 14.

____ 15.

____ 16.

H is oxidized and Cl is reduced in this reaction. 2ClO- +H2 +2e- →2Cl- +2OH-

  1. true
  2. false

In which of the following species is the oxidation number of sulfur less than 6?

  1. SO3
  2. NaSO4
  3. SO2

A proton is transferred between a conjugate acid-base pair.

  1. true
  2. false

A Lewis base is a substance that can _________.

  1. accept a pair of electrons
  2. donate a pair of electrons
  3. donate a hydrogen ion

Which combination of acid and salt in aqueous solution would form a buffer?

  1. carbonic acid and sodium carbonate
  2. hydrochloric acid and potassium chloride
  3. sulfuric acid and calcium sulfate

Which type of solution is one with a pH of 7?

  1. acidic
  2. basic
  3. neutral

The formula of the ammonium ion is written as _________.

a.

b. c.

H3O+ H+

NH4+

A highly active metal is most easily oxidized.

  1. true
  2. false

When an acid reacts with a base, what compounds are formed?

  1. a salt and water
  2. water only
  3. a salt only

 

 
Do you need a similar assignment done for you from scratch? We have qualified writers to help you. We assure you an A+ quality paper that is free from plagiarism. Order now for an Amazing Discount!
Use Discount Code "Newclient" for a 15% Discount!

NB: We do not resell papers. Upon ordering, we do an original paper exclusively for you.