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
Svetradugi [14.3K]
3 years ago
12

If the o2 is collected over water at 25 c (298 k) and 724.0 mm hg total pressure, how many mols o2 will a 1.00 l sample of colle

cted gas contain?
Chemistry
1 answer:
Marina CMI [18]3 years ago
3 0
To answer this item, it is assumed that O2 is an ideal gas such that it follows the ideal gas law.

    PV = nRT

Solving for n,
    n = PV / RT

where n is number of moles, P is pressure, V is volume, R is the universal gas constant, T is the temperature. 

Substituting the known values,
     n = (724 mmHg/760 mmHg/1 atm)(1 L) / (0.0821 L. atm/mol.K)(298 K)

Simplifying,
   n = 0.0389

Hence, the value of n is 0.0389. 
You might be interested in
How does the atomic arrangement of atoms lead to its crystal structure like was seen in the sample of bronze and gold and Timber
Margaret [11]
In mineralogy and crystallography, a crystal structure<span> is a unique </span>arrangement of atoms<span> in a </span>crystal. Atomic arrangement of atoms in this kind of structure usually very symmetrical and highly ordered. Causing the component within the structure is so strong and hard to break. <span>A </span>crystal structure<span> is composed of a unit cell, a set of </span>atoms arranged<span> in a particular way; which is periodically repeated in three dimensions on a lattice. </span>Crystal structure would be commonly found in solid compounds.

7 0
4 years ago
Which part(s) of a telephone involves the conversion of sound waves to electrical signals?
Karo-lina-s [1.5K]
I believe that the answer would be D, both the speaker and the microphone
3 0
3 years ago
Mg(Oh)2 calculate molar mass
kvv77 [185]

Answer:

From molar mass=total RAM

Mg=24,O=16,H=1

24+(16+1)×2

Therefore Molar mass=58g/mol

4 0
3 years ago
The rate of decomposition of N2O5 in CCl4 at 317 K has been studied by monitoring the concentration of N2O5 in the solution. 2 N
pav-90 [236]

Answer:

Average rate of reaction is 0.000565 M/min

Explanation:

Applying law of mass action for the given reaction:

Average rate = -\frac{1}{2}\frac{[N_{2}O_{5}]}{\Delta t}=\frac{1}{4}\frac{\Delta [NO_{2}]}{\Delta t}=\frac{\Delta [O_{2}]}{\Delta t}

Where, -\frac{1}{2}\frac{[N_{2}O_{5}]}{\Delta t} represents average rate of disappearance of N_{2}O_{5}, \frac{1}{4}\frac{[NO_{2}]}{\Delta t} represents average rate of appearance of NO_{2} and \frac{[O_{2}]}{\Delta t} represents average rate of appearance of O_{2}

Here,-\frac{[N_{2}O_{5}]}{\Delta t} = -\frac{(2.16-2.36)}{(177-0)}M/min=0.00113M/min

So average rate of reaction = [tex]-\frac{1}{2}\frac{[N_{2}O_{5}]}{\Delta t}[/tex] = \frac{1}{2}\times (0.00113M/min)=0.000565M/min

7 0
3 years ago
Help plz I will give brain
mel-nik [20]

it wont let me enter answer

3 0
3 years ago
Other questions:
  • The darkest part of the moon’s shadow is called the penumbra. Please select the best answer from the choices provided
    15·2 answers
  • Why are numbers used in chemistry often expressed in scientific notation
    8·1 answer
  • (I NEED THIS ANSWERED QUICKLY!)
    14·1 answer
  • In an electromagnet, you can increase the strength of the magnetic field by Question 6 options: decreasing the thickness of the
    11·1 answer
  • Why won't a fat–soluble vitamin dissolve in water?
    9·1 answer
  • Why do you think some minerals are easier to identify than others?
    8·1 answer
  • The rate constant for the reaction below is 6.2 x 10−5 mol l−1 s −1. if the initial concentration of a is 0.0500 m, what is its
    14·1 answer
  • Please help.
    14·1 answer
  • The number of electrons in a neutral atom is equal to the number of protons? True or false
    6·1 answer
  • If ba+2 will reacts with n-3, the formula of the compound formed is:
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!