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
disa [49]
3 years ago
5

Al añadir 1g de urea a 100 ml de agua a 20ºC, la presión de vapor pasa de 17,54 mmHg a 17,49 mmHg. Determina la masa molecular d

e la urea.
Chemistry
1 answer:
never [62]3 years ago
3 0

Answer: Los  estudios  teóricos  y  experimentales  han  permitido  establecer,  que  los  líquidos  poseen  propiedades  físicas  características.  Entre  ellas  cabe  mencionar:  la  densidad,  la  propiedad  de  ebullir, congelar y evaporar, la viscosidad y la capacidad de conducir la corriente eléctrica, etc. Cada líquido presenta valores característicos (es decir, constantes) para cada una de estas propiedades.             Cuando            un            soluto  y  un  solvente  dan  origen  a  una  solución,  la  presencia  del  soluto  determina  una  modificación  de  estas  propiedades  con  relación  a  su  estado  normal  en  forma  aislada,  es  decir,  líquido  puro.  Estas  modificaciones  se  conocen  como  PROPIEDADES  DE  UNA SOLUCIÓN.

You might be interested in
1. A gas having the following composition is burnt under a boiler with 50% excess air.
jeka94

The composition of the stack gas are :

CH_4= 0.8713

C_3H_8 = 0.0202

CO = 0.107

<h3 /><h3>What is a mole fraction?</h3>

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Assuming 100 g of the stack gas. Calculate the mass of each species in this sample according to their percentages.

Mass of CH_4 : 70% of 100 g = 70 g

Mass of C_3H_8 : 15% of 100 g = 15 g

Mass of CO : 15% of 100 g = 15 g

Now calculate the number of moles of each species:

Number of moles of CH_4 : \frac{70 g}{16.04 g/mol} = 4.3 mole

Number of moles of C_3H_8: \frac{15 g}{144.1 g/mol} = 0.10 mole

Mass of CO : \frac{15 g}{28.01 g/mol} = 0.53 mole

Now to calculate the mole fraction of each we use the formula:

Mole fraction of CH_4: \frac{4.3}{4.935} = 0.8713

Mole fraction of C_3H_8 : \frac{0.10}{4.935} = 0.0202

Mole fraction of CO : \frac{0.53}{4.935} = 0.107

Hence, composition of the stack gas are:

CH_4 = 0.8713

C_3H_8 = 0.0202

CO = 0.107

Learn more about mole fraction here:

brainly.com/question/13135950

#SPJ1

8 0
2 years ago
If you had a 0.5 M KCl solution, how much solute would you have in moles, and what would the solute be?
Svetradugi [14.3K]

Answer:

37.25 grams/L.

Explanation:

  • Molarity (M) is defined as the no. of moles of solute dissolved per 1.0 L of the solution.

<em>M = (no. of moles of KCl)/(volume of the solution (L))</em>

<em></em>

∵ no. of moles of KCl = (mass of KCl)/(molar mass of KCl)

∴ M = [(mass of KCl)/(molar mass of KCl)]/(volume of the solution (L))

∴ (mass of KCl)/(volume of the solution (L)) = (M)*(molar mass of KCl) = (0.5 M)*(74.5 g/mol) = 37.25 g/L.

<em>So, the grams/L of KCl = 37.25 grams/L.</em>

6 0
3 years ago
In the water cycle, matter moves against the pull of gravity during
V125BC [204]
Evaporation and transpiration
5 0
3 years ago
Read 2 more answers
How is the electron cloud model different from Bohr's atomic model?
Cerrena [4.2K]
In the electron cloud model, the atoms are in unpredicted places. But in the Bohr model, atoms are in "rows"
7 0
3 years ago
Ponds and rivers are two types of
NeX [460]
<u><em>Ponds and rivers are two types of  . . . . freshwater ecosystems</em></u>
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is an example of maintaining homeostasis?
    9·1 answer
  • In the reaction n2 + 3h2 ---&gt; 2nh3, how many grams of nh3 are produced if 25.0 g n2 reacts with excess h2? question 10 option
    10·1 answer
  • How many neutrons and protons (nucleons) does an atom with
    11·1 answer
  • How is color a physical change
    12·1 answer
  • What scientists do that is the basis for their investigations
    9·1 answer
  • Two stones resembling diamonds are suspected of being fakes. To determine if the stones might be real, the mass and volume of ea
    15·1 answer
  • When the glucose solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solu
    14·1 answer
  • Match the characteristics of each of the substance to their category
    14·1 answer
  • What’s the answer to this
    13·2 answers
  • Recall all the models you described in task 1. Think about the results each model would predict for Thomson’s experiment. Which
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!