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
raketka [301]
3 years ago
10

Calculate the molality of isoborneol in the product if, a) the melting point of pure camphor is 179°C and the melting point take

n from your sample is 165°C and b) the freezing point depression constant for camphor is 40°C kg/mol.
Chemistry
1 answer:
tresset_1 [31]3 years ago
8 0

Answer:

The molality of isoborneol in camphor is 0.53 mol/kg.

Explanation:

Melting point of pure camphor= T =179°C

Melting point of sample = T_f = 165°C

Depression in freezing point = \Delta T_f=?

\Delta T_f=T- T_f=179^oC-165^oC=14^oC

Depression in freezing point  is also given by formula:

\Delta T_f=i\times K_f\times m

K_f = The freezing point depression constant

m = molality of the sample

i = van't Hoff factor

We have: K_f = 40°C kg/mol

i = 1 (  organic compounds)

\Delta T_f=14^oC

14^oC=1\times 40^oC kg/mol\times m

m=\frac{14^oC}{1\times 40^oC kg/mol}=0.35 mol/kg

The molality of isoborneol in camphor is 0.53 mol/kg.

You might be interested in
g Which statement concerning the structure of the atom is correct? Protons and neutrons have most of the mass and occupy most of
qaws [65]

Protons and neutrons have most of the mass but occupy very little of the volume of the atom.

7 0
3 years ago
Heat of vaporization is the amount of heat required to
deff fn [24]
I believe the answer would be c?? I’m not too sure though
5 0
3 years ago
What part of the sun do we see from earth?
NISA [10]

Answer:

photosphere

Explanation:

photosphere

There are 3 main layers of the Sun that we can see. They are the photosphere, the chromosphere and the corona. Together they make up the "atmosphere" of the Sun. The part of the Sun that glows (and that we see with the naked eye) is called the photosphere

8 0
3 years ago
Read 2 more answers
How does adding salt to water affect the freezing point
melamori03 [73]
Salt makes the freezing point of water decrease, so it would freeze at a warmer temperature than regular water
4 0
3 years ago
No links please. How many moles of methane (CH4) are in 7.31x10^25 molecules?
ad-work [718]

Answer:

molar mass of methane CH4

= C + 4 H  

= 12.0 + 4 x 1.008

= 12.0 +  4.032

= 16.042g/mol

7.31 x 10^25 molecules x             1 mole  CH4      = 121.43 moles

                                      6.02 x 10^23 CH4 molecules

121.43 moles CH4 are present.

Explanation:

not to certain if this is right or not.. but hope it helps!

4 0
2 years ago
Other questions:
  • Which of the following systems has potential energy only?
    12·1 answer
  • Draw the mechanism for the reaction of an alkyl halide with sodium azide
    6·1 answer
  • What charge does a proton have
    8·2 answers
  • How many atoms are in FeS₂?
    9·1 answer
  • Approximately how many plant made pharmaceuticals are currently under different stages of discovery?
    10·1 answer
  • If an atom has a mass number of 25 and an atomic number of 11 how many neutrons are there in this atom?
    7·1 answer
  • 13.Which shows the order of increasing ionization energy?
    12·1 answer
  • Given a magnesium value of 4.5mg/dL, what is the result in SI units?
    7·1 answer
  • What type of bonds are formed between silicon(Si) and oxygen(O) in silicon dioxide (SiO2), a commonly component of sand?
    12·1 answer
  • 1
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!