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
lisabon 2012 [21]
3 years ago
12

The vapor pressure of water at 25.0 oc is 23.8 torr. determine the mass of glucose (molar mass = 180. g/mol) needed to add to 27

.78 moles of water to make a solution that has a vapor pressure of 23.1 torr.
Chemistry
1 answer:
Basile [38]3 years ago
3 0
According to the formula of vapor pressure:

Pv(solu) = n P°v(water)
when we have Pv(solu) = 23.1 torr & Pv(water) = 23.8 torr so we can get the mole fraction of water (n)
∴ n = Pv(solu) / Pv(water)
      = 23.1 / 23.8 = 0.97 mol
when mole fraction of water = moles of water / (moles of water + moles of glucose)
So by substitution::
0.97 = 27.78 / (27.78+ X)
∴moles of gulcose = 0.85 mol
∴ mass of glucose = no.of moles * molar mass
                                = 0.85 * 180 = 152 g


You might be interested in
Sodium oxide contains Na+ ions and O2- ions.<br> Give the formula of sodium oxide
mixer [17]
To be honest, I learned this in school so I'll tell you XD

The formula of sodium oxide is Na2O
8 0
3 years ago
What gas is used in respiration​
myrzilka [38]

Answer:

Los pulmones y el aparato respiratorio nos permiten respirar. Permiten la entrada de oxígeno en nuestros cuerpos (inspiración o inhalación) y expulsan el dióxido de carbono (expiración o exhalación). Este intercambio de oxígeno y dióxido de carbono recibe el nombre de "respiración"

La función del aparato respiratorio es mover dos gases: <em>el oxígeno y el dióxido de carbono</em>

Explanation:

6 0
3 years ago
2) Is an atom with 26 protons and 30 neutrons an element or an isotope?*<br> Element<br> O Isotope
NikAS [45]
Does the element have a different amount of electrons than protons?
8 0
2 years ago
True or false? Molecules are made of atoms of one type
Olegator [25]

Answer:

false

Explanation:

4 0
3 years ago
Read 2 more answers
When studying atoms, scientists can ignore the
vekshin1

When studying atoms, scientists can ignore <u>the Gravitational</u> force between charged particles that make up  the atoms because it is many millions of times smaller than other forces in the atom.

Explanation:

Scientists can ignore the gravitational force because the gravitational force is considered to be negligible as compared to the other forces due to its smaller value.We all know that the gravitational force is directly proportional to the mass of an object which  result in  a small force value.When the value of this small force is compared to the value of the electrical force between protons and electrons in atoms the we can say that the electrical force is million times stronger than the gravitational force

Thus we can say that scientists can ignore <u>the Gravitational</u> force between charged particles that make up  the atoms because it is many millions of times smaller than other forces in the atom.

3 0
2 years ago
Other questions:
  • Hi, someone knows how to balance the following equation, and if you can thank you if you can explain how that is done:
    10·1 answer
  • How many significant figures does 104,000 have
    12·1 answer
  • Suppose m∠1 = 127°. Find the measures of the other angles.
    13·1 answer
  • When was the idea of an atom first developed? Describe this theory.
    13·1 answer
  • During the day, the temperature of the sand in a desert rises as the sand is heated by the sun. After the sun sets, the sand coo
    14·2 answers
  • How many protons does one atom of sulfur have
    10·2 answers
  • Which part of meiosis is most similar to mitosis? Click the hint button to see larger pictures. A The first part of meiosis, cal
    7·1 answer
  • Can some body please help me with this Stoichiometry stuff
    11·1 answer
  • I NEED HELP PLEEEEAASSEEEEE
    7·1 answer
  • Which of the following is/are true?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!