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
Arada [10]
3 years ago
8

Dr. I. M. A. Brightguy adds 0.1727 g of an unknown gas to a 125-mL flask. If Dr. B finds the pressure to be 736 torr at 20.0°C,

is the gas likely to be methane, CH4, nitrogen, N2, oxygen, O2, neon, Ne, or argon, Ar?
Chemistry
1 answer:
AlladinOne [14]3 years ago
7 0

Answer:

The gas that Dr. Brightguy added was O₂

Explanation:

Ideal Gases Law to solve this:

P . V = n . R . T

Firstly, let's convert 736 Torr in atm

736 Torr is atmospheric pressure = 1 atm

20°C = 273 + 20 = 293 T°K

125 mL = 0.125L

0.125 L . 1 atm = n . 0.082 L.atm / mol.K . 293K

(0.125L .1atm) / (0.082 mol.K /L.atm . 293K) = n

5.20x10⁻³ mol = n

mass / mol = molar mass

0.1727 g / 5.20x10⁻³ mol = 33.2 g/m

This molar mass corresponds nearly to O₂

You might be interested in
What is the matter of science​
weqwewe [10]
The finagling in the hole
3 0
3 years ago
How many grams of kclo3 can be dissolved in 100 grams of water at 30 degrees Celsius
kondaur [170]
<span>The solubility of KClO</span>₃ : ( 10.1 / 100 g water ) at 30ºC

10.1 g ------------ 100 g ( H₂O )
    ? g ------------- 100 g ( H₂O )

Mass of KClO₃ :

100 * 10.1 / 100

1010 / 100 = 10.1 g of KClO₃

hope this helps!
8 0
3 years ago
After 17.1 thousand years, what percentage of the original carbon-14 would be left in an organism’s remains? After 17.1 thousand
hram777 [196]

Answer:

12.5%

Explanation:

Initial percentage of carbon 14 = 100%

Final percentage = ?

Time passed = 17.1 * 1000 years = 17100 years

Half life of carbon 14 = 5,730 years.

So how many Half lives are in 17100 years?

Number of Half lives = Time passed /  Half life = 3.18 ≈ 3

First Half life;

100% --> 50%

Second Half life;

50% --> 25%

Third Half life ;

25% --> 12.5%

6 0
3 years ago
In one to two sentences give one reason reactants might not equal visible products after a chemical reaction
Svetradugi [14.3K]

Answer:

If your asking why they are different because atoms are rearranged in a chemical reaction, there must be the same number of sodium atoms and chlorine atoms in both reactants and products for them to be the same.

4 0
3 years ago
As concentrated energy is used to do _____ , it becomes spread out.
nekit [7.7K]
As concentrated energy is used to do WORK, it becomes spread out.
The universe is made up of constant supply of energy. Energy is use to do work; the usefulness of energy is been degraded as it is been used to carry out work. For instance, the energy in petrol is used to run motor vehicles, the process result in the conversion of the chemical energy in the petrol to heat energy. The heat energy that is produced can not be easily gathered and used again, thus, the usefulness of that heat energy has been degraded.
8 0
4 years ago
Other questions:
  • J. Explain how an atom's valence electron configuration determines its place on the periodic table.​
    10·1 answer
  • How do you make life essence on little alchemy?<br> FIRST ONE to ANSWER gets BRAINLEST
    5·2 answers
  • A 10.0 L balloon contains helium gas at a pressure of 655 mmHg. What is the final pressure, in millimeters of mercury, if the fi
    12·1 answer
  • Some soils, like clay, hold water tightly. Other soils, like sand, let the water run through. What property of soils is MOST IMP
    10·1 answer
  • Geometry and polarity of SnCl2
    6·1 answer
  • Which gas is produced when Mg(s) is added to HCl(aq)?<br><br>O2<br><br>H2<br><br>Cl2<br><br>CO2
    13·2 answers
  • QUESTION 1 The ____________________ fan switch is nothing more than a thermostat that closes on a rise in temperature to start t
    9·1 answer
  • 6. What is the number of electrons in an atom that has
    7·1 answer
  • Which soil horizon contains the most organic matter?
    13·1 answer
  • AVERAGE WEIGHT OF CHILDREN, AGE 1-5
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!