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
Sphinxa [80]
3 years ago
6

True or false

Chemistry
1 answer:
Stells [14]3 years ago
7 0

Answer:

true or false

a. very little oxygen and nitrogen are found in air. false

b. oxygen is the main cause of the formation of rust in iron.   false

c.  impure air is odourless true

.d.  plants take in oxygen gas during respiration. true

e. air contains water vapour. ​true

Explanation:

You might be interested in
15. Which is not a zone in the three-layered structure of the ocean relating to density?
SSSSS [86.1K]
I believe the last one
4 0
3 years ago
Read 2 more answers
A mixture of helium, nitrogen and oxygen has a total pressure of 756 mmHg. The partial
Karolina [17]

Answer:

The  partial pressure of oxygen in the mixture is 296 mmHg.

Explanation:

The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone.

This relationship is due to the assumption that there are no attractive forces between the gases.

So, in this case, the total pressure is:

PT=Phelium + Pnitrogen + Poxygen

You know:

  • PT= 756 mmHg
  • Phelium= 122 mmHg
  • Pnitrogen= 338 mmHg
  • Poxygen= ?

Replacing:

756 mmHg= 122 mmHg + 338 mmHg + Poxygen

Solving:

756 mmHg - 122 mmHg - 338 mmHg = Poxygen

Poxygen= 296 mmHg

<u><em>The  partial pressure of oxygen in the mixture is 296 mmHg.</em></u>

6 0
3 years ago
What are essential elements in plants?​
madam [21]

Answer:

Chlorophyll is one. I can't quite remember other

5 0
3 years ago
Calculate the number of copper atoms in a penny.
Grace [21]
Since a mole of atoms contains 6.0221 x 1023 atoms, there are 2.2452 x 1022 zinc atoms and 5.9230 x 1020 copper atoms in a penny, for a total of 2.3044 x 1022 atoms in a penny. Public Domain Image, source: NASA/JPL-Caltech
3 0
3 years ago
HELP ME PLEASE WILL GIVE BRAINLIEST
Natasha2012 [34]

Answer:

D

Explanation:

the chart would show that the student got the best overall results from type X, as compared to the other ones

4 0
3 years ago
Other questions:
  • The dipole measured for HI is 0.380 D. The bond distance is 161 pm. What is the percent ionic character of the HI bond?
    6·1 answer
  • Label the molecular shape around each of the central atoms in the amino acid glycine. hint
    11·2 answers
  • Read the chemical equation shown.
    12·1 answer
  • Zinc is extracted by removing oxygen form zinc oxide what is the name given to a reaction in which oxygen is removed from a subs
    14·1 answer
  • In an oxidation-reduction reaction, what happens to the electrons in the reduction process?
    9·1 answer
  • A 12 foot ladder is leaning against a building. The ladder makes a 45 degree angle with the building. How far up the building do
    5·2 answers
  • Astudent prepareda calibration curve by plotting absorbance of the standards against the [FeSCN2+] molar concentration (M). The
    5·1 answer
  • PLEASE HELP!!
    13·1 answer
  • Where a river flows from an area of harder rock to an area of softer rock, the softer rock may wear away, eventually forming a d
    7·2 answers
  • What is the formula of water<br>​
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!