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
Serga [27]
3 years ago
8

Assume the molality of isoborneol in your product is 0.275 mol/kg. What is the melting point of your impure sample given that th

e melting point of pure camphor is 179°C and its freezing point depression constant is 40°C·kg/mol?
Chemistry
1 answer:
aliina [53]3 years ago
4 0

Answer:

168°C is the melting point of your impure sample.

Explanation:

Melting point of pure camphor= T =179°C

Melting point of sample = T_f = ?

Depression in freezing point = \Delta T_f

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  = 0.275 mol/kg

i = van't Hoff factor

We have: K_f = 40°C kg/mol

i = 1 (  non electrolyte)

\Delta T_f=1\times 40^oC kg/mol\times 0.275 mol/kg

\Delta T_f=11^oC

\Delta T_f=T- T_f

T_f=T- \Delta T_f=179^oC-11^oC=168^oC

168°C is the melting point of your impure sample.

You might be interested in
Which ion La3+ or Lu3+ will form the more stable complex with EDTA4-
shepuryov [24]
I don’t really know but I’ll get someone to help u
6 0
3 years ago
4) What is the order of the energy pyramid.?
bazaltina [42]
Each step of the food chain in the energy pyramid is called a trophic level. Plants or other photosynthetic organisms (autotrophs) are found on the first trophic level, at the bottom of the pyramid. The next level will be the herbivores, and then the carnivores that eat the herbivores.
4 0
3 years ago
During which change of state do atoms lose energy
alexgriva [62]

Answer: Atoms lose energy as a gas changes to a solid.

Explanation:

6 0
3 years ago
Read 2 more answers
How many protons, electrons, and neutrons does silver have
Vera_Pavlovna [14]

Answer:

Heat of vaporization: 250.580 kJ/mol. Number of Protons/Electrons: 47. Number of neutrons: 61. Classification: Transition Metal.

Number of Protons/Electrons: 47

Number of neutrons: 61

Classification: Transition Metal

Number of shells: 5

Explanation:

add 47 to 61 and its 108! hope its right! have a great day!

4 0
3 years ago
Read 2 more answers
Balance the following equation in acidic conditions. phases are optional.
Elanso [62]
This is an oxidation reduction reaction
oxidation happens when the species gives out electrons.Oxidation state of the element Cu increases from 0 to +2
Cu  ---> Cu²⁺ +2e --1)
Reduction happens when the species gains electrons.
Oxidation state of N reduces from +5 to +2
4H⁺ + NO₃⁻ + 3e ---> NO + 2H₂O --2)
To balance the reactions, number of electrons need to be balanced. 
Multiply 1st reaction by 3
Multiply 2nd reaction by 2
3Cu  ---> 3Cu²⁺ + 6e
8H⁺ + 2NO₃⁻ + 6e ---> 2NO + 4H₂O
add the 2 equations 
3Cu + 8H⁺ + 2NO₃⁻ --> 3Cu²⁺ + 2NO + 4H₂O
add 6NO₃⁻ ions to each side 
3Cu + 8HNO₃ --> 3Cu(NO₃)₂ + 2NO + 4H₂O
the balanced redox reaction equation is as follows;

3Cu(s) + 8HNO₃(aq) --> 3Cu(NO₃)₂ (aq)+ 2NO(g) + 4H₂O(l)
4 0
3 years ago
Other questions:
  • 7.744 Liters of nitrogen are contained in a container. Convert this amount to grams.
    15·1 answer
  • Calculate the root mean square velocity of gaseous argon atoms at 26 ∘c.
    13·1 answer
  • Calculate the amount of heat required to heat a 3.3 kg gold bar from 26 ∘C to 69 ∘C. Specific heat capacity of gold is 0.128 J/g
    13·2 answers
  • Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L a
    15·1 answer
  • What mass of Al contains the same number of atoms as 33.5g of Au
    8·1 answer
  • Why is the right side
    9·1 answer
  • All of the elements below can exist as network solids EXCEPT 1. As 2. B 3. Si 4. O 5. C
    7·1 answer
  • Using balanced chemical equations, explain the observed conductivity at the point of faint pink indicator color for:
    15·1 answer
  • If 7.4 moles of carbon dioxide is produced in this reaction, how many moles of oxygen gas would be needed?
    8·1 answer
  • All elements have a AHf, of ___
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!