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
IrinaK [193]
3 years ago
5

Vapor obtained by evaporating 0.495 grams of an unknown liquid is collected in a 127 mL flask. At 371 K, the pressure of the vap

or in the flask is 754 torr. What is the molar mass in g/mol?
Chemistry
1 answer:
lidiya [134]3 years ago
3 0

Answer:

The molar mass in g/mol is 121.4 g/m

Explanation:

Let's apply the Ideal Gases Law to solve this:

P . V = n . R. T

V = 125 mL → 0.125L

P = 754 Torr

760 Torr ___ 1 atm

754 Torr ____ (754 / 760) = 0.992 atm

Moles = Mass / Molar mass

0.992 atm . 0.125L = (0.495 g / MM) . 0.082 . 371K

(0.992 atm . 0.125L) / (0.082 . 371K) = (0.495 g / MM)

4.07x10⁻³ mol = 0.495 g / MM

MM = 0.495 g / 4.07x10⁻³ mol → 121.4 g/m

You might be interested in
A balloon is filled with 35.0 L of helium in the morning when the temperature is 35.00 oC.
nexus9112 [7]

Answer: V = 33.9 L

Explanation: We will use Charles Law to solve for the new volume.

Charles Law is expressed in the following formula. Temperatures must be converted in Kelvin.

V1 / T1 = V2 / T2 then derive for V2

V2 = V1 T2 / T1

= 35 L ( 308 K ) / 318 K

= 33.9 L

5 0
2 years ago
How long did it take for a car to travel 20 meters with a speed of 10m/s
AfilCa [17]

Answer:

2 second

Explanation:

yes

6 0
2 years ago
When a group 1 element and a group 16 element bond, the subscripts in the formula will always be?
zloy xaker [14]

Answer:

A.  

X2Y2

Explanation:

4 0
2 years ago
Consider the following chemical equilibrium:
jok3333 [9.3K]

Answer:

Kc = [CH₄] / [H₂]²

Kp = [CH₄] / [H₂]² * (0.082*T)^-1

Explanation:

Equilibrium constant, Kc, is defined as the ratio of the concentrations of the products over the reactants. Also, each concentration of product of reactant is powered to its coefficient.

<em>Pure solids and liquids are not taken into account in an equilibrium</em>

Thus, for the reaction:

C(s)+ 2H₂(g) ⇌ CH₄(g)

Equilibrium constant is:

<h3>Kc = [CH₄] / [H₂]²</h3>

Now, using the formula:

Kp = Kc* (RT)^Δn

<em>Where R is gas constant (0.082atmL/molK), T is the temperature of the reaction and Δn is difference in coefficients of gas products - coefficients of gas reactants (1 - 2= -1)</em>

Replacing:

<h3>Kp = [CH₄] / [H₂]² * (0.082*T)^-1</h3>

<em />

4 0
3 years ago
How does the behavior of the water molecules change as the pan of water is heated?
VladimirAG [237]
The behavior of the water molecules change as the pan of water is heated, As the water is heated, the water molecules move faster and farther apart. The molecules change as the water is heated and the water molecules move faster and farther.<span>
</span>
5 0
3 years ago
Other questions:
  • When two forces acting on an object are equal, they are
    7·1 answer
  • HELP ME PLEASE I BEG YOU
    8·1 answer
  • 2NBr3 + 3NaOH = N2 +3NaBr + 3HOBr
    5·2 answers
  • What is the ph level of water?
    9·2 answers
  • a given sample of a gas has a volume of 3.0 L at a pressure of 4.0 atm. If the temperature remains constant and the pressure is
    15·1 answer
  • 4.81 (a) What volume of 0.115 M HClO4 solution is needed to
    11·1 answer
  • During an experiment a student measured the temperature of water while it boiled in a pot on a stove. The temperature of the wat
    13·2 answers
  • What is the substitution reaction <br>plzz answer ​
    5·1 answer
  • Find the boiling point temperature at 760 torr of an isomer of octane, c8h18, if its enthalpy of vaporization is 38,210 j mol-1
    9·1 answer
  • Arrange the following solutions in incresing order of ph
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!