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
Karo-lina-s [1.5K]
3 years ago
7

Why a finely powdered sample should be used in a melting point measurement?

Chemistry
1 answer:
lapo4ka [179]3 years ago
6 0

because it a essential for good heat transfer

You might be interested in
Acetanilide has a solubility of 1.00 g/185 ml in 25 oc water and 1.00 g/20 ml in 100 oc water. what is the minimum volume of wat
Likurg_2 [28]

In the crystallization process the solid compound is dissolved in the solvent at elevated temperature and the crystallize product obtained by slow cooling of the  solution. Here the solubility of acetanilide at 100°C is 1g per 20mL of water. Thus to dissolve 500mg of acetanilide at high temperature that is 100°C we need 10mL of water.

Now at 25°C after the re-crystallization there will be some amount of dissolve acetanilide. Which can be calculated as- 185mL of water is needed to dissolve 1g or 1000mg of acetanilide at 25°C. Thus in 10mL of water there will be \frac{10X1000}{185}=54.05gmg of acetanilide.    

6 0
3 years ago
1 what do you understand by the term isotopes 2 why do I should talk of an element process identical chemical properties 3 name
Bad White [126]

Answer:

Isotopes of an element have same number of protons but different number of neutrons. Which means isotopes of an element have same atomic number but different mass number.

The chemical property of an element is determined by the number of electrons. And as all the isotopes have same number of electrons, they have same chemical properties.

Thus as isotopes of an element have same atomic number , they have same number of electrons and protons. As they have different mass number, the number of neutrons will be different. Hydrogen has three isotopes , ^1_1\textrm{H}, ^2_1\textrm{H} and ^3_1\textrm{H}. Thus ^1_1\textrm{H} has no neutron.

5 0
3 years ago
Hey I have a chemistry problem pls tell me how do you find the percentage thx...
Julli [10]

Answer:

88.24

Explanation:

find the total mass of the compound using there RAM which has been give then the mass of caborn

4 0
3 years ago
How does the force of gravity on Jupiter compare to the force of gravity on Earth?
iogann1982 [59]

Jupiter has greater gravitational pull than earth, about 2.4 time greater than that of earth. This means that a person weighing 100 pound on earth will weigh 240 pounds on Jupiter.

Jupiter is the largest planet in the solar system. It is so large that all other planets would comfortably fit inside it. It is over 1000 times bigger than the earth.

Jupiter is the fifth planet from the sun and rotates faster than any other  planet. A day in Jupiter is about 10 hours long.



7 0
3 years ago
Choose the best answer that completes the sentence. A complex ion contains _________________. Group of answer choices a central
STatiana [176]

Answer:

A complex ion contains a central metal ion bound to one or more ligands

Explanation:

A complex ion is consists of a central atom or ion, that is usually metallic, called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.

An example of a complex ion is

[Co(NH3)6]3+

Please go through the attached file for a proper representation of the complex ion.

5 0
3 years ago
Read 2 more answers
Other questions:
  • Calculate the equilibrium constants K’eq for each of the following reactions at pH 7.0 and 25oC, using the ∆Go’ values given: (a
    6·1 answer
  • A sample of iron has the dimension of 2cm x 3cm x2cm. If the mass of this rectangular shaped objects is 94g, what is the density
    10·1 answer
  • Calculate the mass of NaF that must be added to 300ml if a 0.25m HF solution to form a buffer solution with a ph of 3.5​
    6·1 answer
  • Key terms: Reset ____________ anions are strong nucleophiles that open epoxide rings by an SN2 mechanism. ____________ tautomers
    12·1 answer
  • Relationship between boiling temperature and vapour pressure
    9·1 answer
  • Convertible bonds are examples of: a. Securities that have characteristics of both debt and equity b. Non-recurring items c. Ass
    15·1 answer
  • Calculate the change in ph if 0.070 g of solid naoh is added to 100 ml of the solution in the problem above.
    5·1 answer
  • In what situation can energy be created or destroyed?
    13·1 answer
  • A sample of a gas in a 4 L container at 300 K has a pressure of 1 atm. If the temperature is increased to 600 K and the volume i
    10·1 answer
  • Determine the name and formula of a hydrate with the following composition; 32.30%
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!