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
Scrat [10]
3 years ago
11

Air with less than 19.5% oxygen cannot support human life. How many moles of oxygen would the caisson if the percent of oxygen i

n the air dropped to 19.4%.
Chemistry
1 answer:
irinina [24]3 years ago
8 0
Are we adding the percent?
You might be interested in
Properties of a substance which can be measured or observed without altering the identity of the substance being measured are __
rosijanka [135]

Answer:

The correct answer is physical properties and/or phase properties.

Explanation:

Chemical properties can alter the substance (if you burn wood, it becomes ash and is no longer wood).

Reactive properties are also chemically changing the substance.

Phase properties are where the element can be in solid, liquid, or gas form so these could also be an answer.

8 0
3 years ago
A gas occupies a volume of 72 ml at 400 k and 800 torr. if the temperature drops to 200 k and the pressure changes to 400 torr,
satela [25.4K]
We are tasked to solve for the volume of the gas that occupies when pressure and temperature changes to 400 Torr and 200 Kelvin from Torr and 400 Kelvin. We can use ideal gas law assuming constant gas composition and close system. The solution is shown below:
P1V1 / T1 = P2V2 / T2
V2 = P1V1T2 / T1P2
V2 = 800*72*200 / 400*400
V2 = 72 ml

The answer for the volume is 72 ml.
7 0
3 years ago
An isothermal plug flow reactor is used to remove an environmental contaminant from polluted water via a 2nd-order reaction. A r
evablogger [386]

Answer:

The exact result is 82.5 min (close to c. 80 min)

Explanation:

Hello,

In the following picture you'll find the numerical procedure for this exercise.

- Take into account that the initial concentration and the velocity constant remain constant for the two mentioned scenarios.

Best regards.

5 0
3 years ago
Name three variables that affect a living system
Gnesinka [82]
Environment, Temperature, and Food.
7 0
3 years ago
Bee venom contains acids and other compounds that cause the pain and itching from a bee sting. Calamine lotion, which is a mild
Alenkinab [10]
A. it helps neutralizes the bee venom, just like if you spill acid you need to clean it with a base and neutralizer
7 0
3 years ago
Other questions:
  • What are the disadvantages of driverless cars? Check all that apply.
    11·2 answers
  • Help me plsssssssssssssssssss
    13·2 answers
  • • Which of the following elements are most likely to act as 9 acceptor impurities in germanium? (a) bromine, (b) gallium, (c) si
    7·1 answer
  • Which knowledge is radiometric dating based upon?
    8·1 answer
  • A voltaic cell is constructed in which the anode is a Fe|Fe2 half cell and the cathode is a Cd|Cd2 half cell. The half-cell comp
    13·1 answer
  • What identifies an ion
    15·1 answer
  • What is the molar mass of tin (IV) sulfide
    5·2 answers
  • What is the number of significant figures in the measurement 5.00 cubic meters? *
    14·1 answer
  • NO BOTS PLEASE HELP
    10·1 answer
  • Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!