« previous next »

Author Question: Which of the following statements about He is false? a. It is an inert gas. b. It is odorless. ... (Read 60 times)

mydiamond

  • Hero Member
  • *****
  • Posts: 804
on: Jul 16, 2018
Which of the following statements about He is false?
 
  a. It is an inert gas.
  b. It is odorless.
  c. It is nonflammable.
  d. It is heavier than air.

Question 2

Which of the following statements about CO2 are true? 1. It does not support animal life. 2. It is a flammable gas. 3. It is odorless and colorless. 4. It is heavier than air.
 
  a. 1 and 3 only
  b. 2 and 3 only
  c. 3 and 4 only
  d. 1, 3, and 4 only


Cnarkel

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
Helium is second only to hydrogen as the lightest of all gases; it has a density at STPD of 0.1785 g/L. Helium is odorless, tasteless, nonflammable, and chemically and physiologically inert.

Answer to Question 2

ANS: D
At STPD, CO2 is a colorless and odorless gas with a specific gravity of 1.52 (approximately 1.5 times heavier than air). Carbon dioxide does not support combustion or maintain animal life.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

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.

The Sun in false-color ultraviolet image The Sun in false-color ultraviolet image
Which of the following statements is true of linkage? Which of the following statements is true of linkage?
Ratings of Perceived Contradictions in Political Statements Ratings of Perceived Contradictions in Political Statements
How to convert verbal statements into algebraic equations (Part 1) How to convert verbal statements into algebraic equations (Part 1)
How to convert verbal statements into algebraic equations (Part 3) How to convert verbal statements into algebraic equations (Part 3)
How to convert verbal statements into algebraic equations (Part 4) How to convert verbal statements into algebraic equations (Part 4)
Video: Blood Pressure Measurement

For a complete list of videos, visit our video library