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
nikdorinn [45]
3 years ago
7

A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing point depression of

the solvent if the freezing point constant is -1.86 °C/m? Show all of the work needed to solve this problem.
Chemistry
1 answer:
sergij07 [2.7K]3 years ago
7 0
From the equation; ΔTf = Kf × m
Where, Kf for water = 1.853 K kg/mole; m is the molarity = number of solute/amount of solvent in kg.
Glucose is the solute whose molecular mass is 180 g/mole and water is the solvent. 
Moles of solute = 15.5/180 = 0.0861 moles
Amount of solvent in kg = 245/1000 = 0.245 Kg
Therefore; molarity = 0.0861/0.245 = 0.3515 moles/Kg
Therefore; ΔTf = 1.853 × 0.3515 = 0.6513 K
Hence; the depression in freezing point is 0.6513 
The freezing point of solution will therefore be;
= 273 - 0.6513 = 272.3487 K

You might be interested in
4. Naming Molecules<br> a) Describe how ionic bonds are formed at the atomic level.
RoseWind [281]

Explanation:

Ionic bonds involve a cation and an anion. The bond is formed when an atom, typically a metal, loses an electron or electrons, and becomes a positive ion, or cation. Another atom, typically a non-metal, is able to acquire the electron(s) to become a negative ion, or anion.

8 0
3 years ago
Isotopes with unstable nuclei are_______and are called _______.
Inga [223]

Answer:

Radioactive and are often called radioisotopes

8 0
3 years ago
If you have exactly 2.00 moles each, of two different substances, then which of the following must be true about the two samples
Gwar [14]
The true is that both substances will have 2 * 6.02* 10^23 = 12.04 * 10^23 particles (may be molucules or atoms(.

Also, the two moles of each substance will have different masses, because you have to multiply the number of moles of each substance by the respective molar mass (or atomic mass).


4 0
3 years ago
How many moles are in 25.90 grams of NaCl
inessss [21]

Answer:

0.44316859040048207mol

Explanation:

7 0
2 years ago
The process of pouring a mixture though a filter to catch the larger particles while allowing the smaller particles to pass thro
Annette [7]
This process is called filtration. This process is a solid-fluid separation by the use of a medium wherein only the fluid (gases or liquids) can go through it. The medium is called the filter while the fluid that passed through the filter is called the filtrate. The solid particles are the large particles which cannot pass through the filter.
4 0
3 years ago
Other questions:
  • An oxygen atom, with 6 electrons (of a possible 8) in its outer electron shell, has the capacity to form a maximum of how many c
    13·1 answer
  • A solution of iron chloride has a density of 1.118g/mL. what volume of solution would have a mass of 1.75kg?
    10·1 answer
  • Radioactive decay can be described by the following equation where is the original amount of the substance, is the amount of the
    10·1 answer
  • Write ground-state electron configurations for Na+ using a noble gas core abbreviation.
    14·1 answer
  • The section of the comprehensive annual financial report that presents tables and charts showing social and economic data in add
    10·1 answer
  • The following reaction was performed in a sealed vessel at 760 ∘C : H2(g)+I2(g)⇌2HI(g) Initially, only H2 and I2 were present at
    9·1 answer
  • If Li loses an electron to another atom, why is it written Li^+1 (with a +1)
    11·1 answer
  • I really need help plz plz plz plz plz plz
    13·1 answer
  • PLEASE HELP ONLY ONE QUESTION
    11·2 answers
  • Determine The Oxidation Number for
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!