« previous next »

Author Question: Consider the following unbalanced half-reaction: MnO4- MnO2. The oxidation number of Mn changes ... (Read 169 times)

kamilo84

  • Sr. Member
  • ****
  • Posts: 495
on: Aug 27, 2018
Consider the following unbalanced half-reaction: MnO4-  MnO2. The oxidation number of Mn changes from ________, and the Mn is ________.
 
  A) +4 to +7; reduced
  B) +7 to +4; oxidized
  C) +4 to +7; oxidized
  D) +7 to +4; reduced

Question 2

What is the oxidation number of bismuth in Bi2O3?
 
  A) +1
  B) +2
  C) +3
  D) +6

Question 3

Calcium carbonate is NOT found in
 
  A) seashells.
  B) chalcopyrite.
  C) pearls.
  D) stalactites.


abctaiwan

  • Sr. Member
  • ****
  • Posts: 355
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

C

Answer to Question 3

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Did you know?

More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

Did you know?

Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

Types of variation in chromosome number. Types of variation in chromosome number.
Redox Reaction Redox Reaction
Simple amplification of 1kb DNA fragments by polymerase chain reaction. Simple amplification of 1kb DNA fragments by polymerase chain reaction.
A phosphoribosyltransferase reaction A phosphoribosyltransferase reaction
Which of the following represents a reaction coordinate diagram for a chemical reaction whose ... Which of the following represents a reaction coordinate diagram for a chemical reaction whose ...
Number line (5 - 1) Number line (5 - 1)
Video: Energy Flow - Trophic Levels and Food

For a complete list of videos, visit our video library