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
Anna35 [415]
4 years ago
10

When comparing melting temperature ranges of pure and impure samples, which of the following statements describes the melting te

mperature range of an impure sample?For a pure substance: the melting temperature range is narrower than that of an impure sample or the melting temperature range is broader than that of an impure sample?
For an impure substance: the melting point is higher than that of a pure samplr or the melting point is lower than that of a pure sample
Chemistry
1 answer:
kkurt [141]4 years ago
8 0

Answer:

Addition of impurity results in lowering of the melting point, thus increases the melting point range. The pure substances have the higher melting points and thus decreases the melting point range.

So following are the correct sentences.

For a pure substance, the melting temperature range is narrower than that of an impure sample.

For an impure substance, the melting point is lower than that of a pure sample.

You might be interested in
List two products derived from ethylene
laiz [17]
Ethylene is the starting material for the preparation of a number of two-carbon compounds including ethanol (industrial alcohol), ethylene oxide (converted to ethylene glycol for antifreeze and polyester fibres and films), acetaldehyde (converted to acetic acid), and vinyl chloride (converted to polyvinyl chloride).
8 0
2 years ago
Howmany copper atoms there is in Copper(II) oxide?​
Oxana [17]

Answer:

copper(ll) has 4 oxygen atoms

8 0
3 years ago
Read 2 more answers
What is the frequency,in Hz,of electromagnetic radiation that has a wavelength of 1.25m​
Kryger [21]

Answer:

f=2x10^8Hz

Explanation:

Hello!

In this case, given that frequency of the electromagnetic radiation showing off a wavelength of 1.25 m is computed by using the speed of light as shown below:

f=\frac{c}{\lambda }

We plug in the wavelength and speed of light to obtain:

f=\frac{3x10^8m/s}{1.25m } \\\\f=2x10^8Hz

Best regards!

5 0
3 years ago
Identify each definition that applies to the compound in red check all that apply mg(oh)2
sp2606 [1]

Answer:

the answer is in the picture

4 0
3 years ago
Check all of the statements that are true.
garri49 [273]

Answer:

None of these statements are true

Explanation:

(a)

Heavier and large molecules or atoms exhibit greater dispersion force than lighter ones due to easily form temporary dipoles by large molecule.

(b)

Compounds with hydrogen bonding usually have higher boiling point than that of similar compound without hydrogen bonding,

Because boiling point of a compounds depends on force of attraction between the molecules.

(c)

Non polar compounds usually have lower boiling points than polar compounds of similar mass due to dipole dipole attractive force of polar compound.

6 0
4 years ago
Other questions:
  • Solutes usually dissolve best in cold<br> solvents.
    8·1 answer
  • The concentration of the alkane c20h42 (fm 282.56) in a particular sample of rainwater is 0.2 ppb. assume that the density of ra
    9·1 answer
  • What type of compound does the formula HCl represent? iconic salt or covalent molecule
    12·2 answers
  • What are at least two things that atoms/molecules must do in order to react in a chemical reaction ? Think similar to legos
    14·2 answers
  • A car has a mass of 1.00 × 103 kilograms, and it has an acceleration of 4.5 meters/second2. What is the net force on the car?
    13·2 answers
  • The free energy obtained from the oxidation (reaction with oxygen) of glucose (C6H12O6) to form carbon dioxide and water can be
    6·1 answer
  • Help! I don't know if it's abrasion or ice wedging
    14·2 answers
  • Just enough 0.500 M HCl is added to 30.0 mL of 2.5 M NH3 to reach the equivalence point. The Kb of NH3 = 1.8 X 10-5
    14·1 answer
  • Name the organic compound of ch3chohch2ch3
    10·1 answer
  • How many molecules are in 97.21 grams of Sodium Chloride (NaCl)?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!