1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
PilotLPTM [1.2K]
3 years ago
12

why is the concentration of helium increased in some gas mixtures that divers breath in order to reduce the partial pressure of

oxygen?
Chemistry
1 answer:
sdas [7]3 years ago
8 0

Answer:

Because of oxygen toxicity.

Explanation:

Oxygen toxicity.

Oxygen has been known to cause central nervous system (CNS) toxicity when the pressure gets higher. This toxicity can cause convulsions, and this can cause the diver to drown.

The current standard maximum safe oxygen working pressure is 1.4 atm ppO2. This is equal to 56.5m/185′ when breathing air (21% O2 / 79% N). Below that depth the fraction of oxygen in a breathing gas must be reduced, and in order to maintain this maximum pressure of 1.4 ppO2, Helium must be added.

You might be interested in
Solid to Gas
miskamm [114]

Answer:

c. c. c c c c c cçcc. ccccccccc

Explanation:

ccc cc

7 0
3 years ago
Which parts of LED bulb needs to stay cool as well as which part must transfer energy away from the diode???
storchak [24]

Answer:

every method of removing heat from LED's should be considered. Conduction, convection, and radiation are the three means of heat transfer. Typically, LED's are encapsulated in a transparent resin, which is a poor thermal conductor. Nearly all heat produced is conducted through the back side of the chip. Heat is generated from the PN junction by electrical energy that was not converted to useful light, and conducted to outside ambiance through a long path, from junction to solder point, solder point to board, and board to the heat sink and then to the atmosphere. A typical LED side view and its thermal model are shown in the figures.

Explanation:

6 0
3 years ago
SOMEONE HELP
sergeinik [125]
1. sundering

2. talc

3 luster
8 0
3 years ago
A decrease in the magnitude of velocity is called
IceJOKER [234]
<span>The answer is deceleration. Acceleration is the general term to refer to the change in velocity. Acceleration = change in velocity / change in time. When you want to highlight the fact that the change in velocity is a decrease in the magnitude, you can use the term deceleration, which means that the acceleration is negative.</span>
3 0
3 years ago
PLSS HELP ME! Read each statement below and decide if you agree or disagree. Write Agree or Disagree below each statement, based
motikmotik

Answer:

1. Temperature is the measurement of how hot or cold something is.

agree

2. When something heats up, new energy is created, and when something cools down, energy is destroyed.

disagree

3.When something heats up, it moves faster, and when something cools down, it moves slower.

agree

4. Hotter things have more energy than colder things.

agree

4 0
2 years ago
Other questions:
  • Consider the following reaction mechanism:
    8·2 answers
  • Calculate the density, in grams per liter, of hydrogen sulfide gas, h2s, at 56oc and 967 mmhg. [1] g/l
    8·1 answer
  • What causes a chemical change In electrolytic cells?
    7·1 answer
  • Which term refers to the process by which ions that have entered solution are kept in solution?
    7·2 answers
  • The average atomic mass for any element will be closest to the average atomic mass of the ________ isotope.
    12·1 answer
  • At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s
    14·1 answer
  • What volume of a 1.3 M solution of Na2CO3 can be made from 800 ml. of a 4.9
    8·1 answer
  • Suppose that 4.8 L of methane at a pressure
    12·1 answer
  • 7. Which element in period 5 has properties similar to barium?
    5·1 answer
  • What is the molarity of a solution in which 28g of sodium chloride (NaCl) is dissolved in 250mL of solution.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!