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tiny-mole [99]
3 years ago
7

What phase change is the following substance undergoing?

Chemistry
1 answer:
Dvinal [7]3 years ago
5 0

Answer:

b melting

Explanation:

The phase change the substance is undergoing is from solid to liquid and this is called melting.

  • To understand this process, we need to know the the substance changing.
  • A substance that contains particles that are not easily compressed and packed is a solid.
  • Solids have fixed shapes and volumes.
  • Liquids can easily flow although they cannot also be easily compressed.

The phase change from solid to liquid is facilitated by a melting process.

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Which gas will effuse at the rate closest At a particular pressure and temperature, nitrogen gas effuses at the rate of 79mLs. U
Contact [7]

Answer : The rate of effusion of sulfur dioxide gas is 52 mL/s.

Solution :

According to the Graham's law, the rate of effusion of gas is inversely proportional to the square root of the molar mass of gas.

R\propto \sqrt{\frac{1}{M}}

or,

(\frac{R_1}{R_2})=\sqrt{\frac{M_2}{M_1}}       ..........(1)

where,

R_1 = rate of effusion of nitrogen gas = 79mL/s

R_2 = rate of effusion of sulfur dioxide gas = ?

M_1 = molar mass of nitrogen gas  = 28 g/mole

M_2 = molar mass of sulfur dioxide gas = 64 g/mole

Now put all the given values in the above formula 1, we get:

(\frac{79mL/s}{R_2})=\sqrt{\frac{64g/mole}{28g/mole}}

R_2=52mL/s

Therefore, the rate of effusion of sulfur dioxide gas is 52 mL/s.

4 0
3 years ago
An alpha particle is equivalent to the nucleus of an atom of which element?(1 point)
Katyanochek1 [597]

Answer:

this is what i got

Explanation:

α-decay: When a radioactive nucleus disintegrates by emitting an αα-particle, the atomic number decreases by two and mass number decreases by four. Example: 88​Ra226→86​Rn222+2​He4.

3 0
3 years ago
Which situation is an example of heat transfer by radiation?
Artist 52 [7]
Answer is:
The sun's energy is transferred through the vacuum of space to Earth
5 0
4 years ago
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Clare is a 14-year-old female who lives with her 29-year-old mother and three younger siblings in a two-bedroom apartment in a h
iVinArrow [24]

Answer:

What percent of physically assaulted or abused adolescents reported lifetime substance abuse or dependence? Select one:

d. 25 percent

Explanation:

The study performed at the National Institute of Justice in 2003, called  "Youth Victimization: Prevalence and Implications", Washington, D.C., U.S. Department of Justice, showed a rate of lifetime substance abuse or dependence at approximately 25 percent for adolescents who had been physically assaulted or abused. This compares to a rate of approximately six percent for adolescents who had not been physically assaulted or abused.

3 0
3 years ago
The emission of electrons from a metallic surface depends on the intensity of the incident radiation.
elixir [45]

Answer:

I ........believe it's true

7 0
3 years ago
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