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
Ivan
3 years ago
15

What is the vapor pressure (in mm Hg) of a solution of 17.5 g of glucose (C6H12O6) in 82.0 g of methanol (CH3OH) at 27∘C? The va

por pressure of pure methanol at 27∘C is 1.40×102 mm H
Chemistry
1 answer:
vichka [17]3 years ago
5 0

Answer:

134.8 mmHg is the vapor pressure for solution

Explanation:

We must apply the colligative property of lowering vapor pressure, which formula is: P° - P' = P° . Xm

P° → Vapor pressure of pure solvent

P' → Vapor pressure of solution

Xm → Mole fraction for solute

Let's determine the moles of solute and solvent

17.5 g . 1 mol/180 g = 0.0972 moles

82 g . 1mol / 32 g = 2.56 moles

Total moles → moles of solute + moles of solvent → 2.56 + 0.0972 = 2.6572 moles

Xm → moles of solute / total moles = 0.0972 / 2.6572 = 0.0365

We replace the data in the formula

140 mmHg - P' = 140 mmHg . 0.0365

P' = - (140 mmHg . 0.0365 - 140mmHg)

P' = 134.8 mmHg

You might be interested in
Decay chains exist because
Paraphin [41]
It occurs in a series of sequential reactions until a stable nucleus is reached because Nuclear decay occurs when the nucleus of an atom is unstable and spontaneously emits energy in the form of radiation.
4 0
3 years ago
What mass of CO is needed to react completely with55.0 g of Fe2O3(s)+CO(g) yield Fe(s)+CO2(g)?
Katarina [22]

Answer:

28.9 g

Explanation:

We know that we will need a balanced equation with masses, moles, and molar masses of the compounds involved.  

<em>Gather all the information in one place</em> with molar masses above the formulas and masses below them.  

M_{r}:     159.69    28.01

              Fe₂O₃ + 3CO ⟶ 2Fe + 3CO₂

Mass/g:  55.0

1. Use the molar mass of Fe₂O₃ to calculate the moles of Fe₂O₃.

\text{Moles of Fe$_{2}$O$_{3}$} =\text{55.0 g Fe$_{2}$O$_{3}$} \times \frac{\text{1 mol Fe$_{2}$O$_{3}$}}{\text{159.69 g Fe$_{2}$O$_{3}$}}= \text{0.3444 mol Fe$_{2}$O$_{3}$}

2. Use the molar ratio of CO:Fe₂O₃ to calculate the moles of CO.

\text{Moles of CO} = \text{0.3444 mol Fe$_{2}$O$_{3}$} \times \frac{\text{3 mol CO}}{\text{1 mol Fe$_{2}$O$_{3}$}}= \text{1.033 mol CO}

3.Use the molar mass of CO to calculate the mass of CO.

\text{Mass of CO} = \text{1.033 mol CO}  \times \frac{\text{28.01 g CO} }{\text{1 mol CO}}= \textbf{28.9 g CO}  

3 0
3 years ago
Read 2 more answers
What are the two formulas for the ions that's make up AgC2H3O2 bromide?
Brilliant_brown [7]

Answer:

KCI+AgC2H3O2

Explanation:

5 0
3 years ago
Which models of the atom does the experimental evidence from Bohr's hydrogen experiment support? Explain why these models are co
STALIN [3.7K]

Answer:

Rutherfords

Explanation:

The model of the atom supported by Bohr's hydrogen experiment is the Rutherford's model of the atom.

Rutherford through his experiment on gold foil suggested the atomic model of the atom. The model posits that an atom has a small positively charged center(nucleus) where nearly all the mass is concentrated.

  • Surrounding the nucleus is the large space containing electrons.
  • In the Bohr's model of the atom, he suggested that the extranuclear space of the atom is made up of electrons in specific spherical orbits around the nucleus.
8 0
3 years ago
Molecule: Br2 and Br2. <br> Is it polar or nonpolar?
Ostrovityanka [42]
This combination in non polar.
7 0
3 years ago
Other questions:
  • What is the mole ratio that can convert from moles of A to moles of B?
    12·1 answer
  • If 25.0g of H2O at 11.2 Celsius is combined with 75.0g H2O at 87.2 degree Celsius, what is the final temperature of the mixture?
    14·1 answer
  • What is a physical property of toothpaste
    7·2 answers
  • Practicing Density Calculations: A 4.80 gram piece of magnesium displaces 2.76 mL of water when it’s placed in a graduated cylin
    11·1 answer
  • Calculate the molar mass of Al2O3.<br> A) 70 g/mol B) 43 g/mol C) 102 g/mol<br> D) 210 g/mol
    15·1 answer
  • What are the lengths of the diagonals of the kite?
    10·1 answer
  • I NEED HELP ASAP!!! PLEASE!!!
    6·2 answers
  • What kind of elements are on the left side of the zig-zag line on the periodic table? ​
    12·1 answer
  • this is what you can pick through organs, structure or tissue : A group of cells connected together. They have similar make-up a
    13·1 answer
  • Which molecule is methylamine?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!