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
stellarik [79]
3 years ago
15

The first law of thermodynamics is a restatement of the

Chemistry
1 answer:
klasskru [66]3 years ago
4 0

the law of thermodyanamic is the restatement of the law of conservation of energy

You might be interested in
Formaldehyde, ch2o, is used as an embalming agent. draw the structure of ch2o including lone pairs.formaldehyde, ch2o, is used a
Llana [10]
<span>Aldehydes and ketones have the C=O grop in their structure Formaldehyde : ......O ......ll ......C ..../....\ ..H....H</span>
8 0
3 years ago
Compare the de Broglie wavelength of an alpha particle moving at 3.40×107 miles per hour (1.52×107 m/s) to that of a baseball mo
denis-greek [22]

Answer:

1.74 x 10⁻²⁰(baseball) : 1.90 x 10⁴ (electron) : 1 (alpha particle)

baseball not detected

electron x ray

alpha particle beyond gama rays

Explanation:

The strategy for us here is to utilize deBroglie relation of wavelength and momentum:

λ = h/ mv

where  λ is wavelength,  h isPlanck´s constant, m is the mass of the particle, and v its velocity.

For determining the regions of spectrum the wavelengths fall into, we need to consult charts that describe the wavelengths vs region.

So  using the above  equation we will compute the wavelengths for the alpha particle, baseball,  and an electron.

Notice we are missing the masses of the alpha particle, and that of the electron, and baseball

The mass of the alpha particle is 4 times  amu  (4 x 1.66 x 10⁻²⁷ Kg ) since the alpha particle is esentially a helium nucleus which has atomic number 4.

The mass of the electron is 9.11 x 10⁻³¹ kg.

Mass of baseball per rules around 0.145 kg.

Notice we are working in the metric system, so use the velocities in m/s.

Now that we have all the data required, lets proceed to calculate the respective wavelengths.

λ ( alpha particle ) = 6.626 x 10⁻³⁴ J·s / ( 4 x 1.66 x 10⁻²⁷ kg x 1.52 x 10⁷ m/s )

= 6.57 x 10⁻¹⁵ m

λ ( baseball ) = 6.626 x 10⁻³⁴ J·s / ( 0.145 kg  x 40.2 m/s ) = 1.14 x 10⁻³⁴ m

λ ( electron ) = 6.626 x 10⁻³⁴ J·s / ( 9.11 x 10⁻³¹ kg x 5.81 x 10⁶ m/s )

= 1.25 x 10⁻¹⁰ m

Comparing the wavelengths from largest to smallest we have:

λ ( baseball) : λ ( electron )   : λ ( alpha particle )

1.14 x 10⁻³⁴  : 1.25 x 10⁻¹⁰ :  6.57 x 10⁻¹⁵

1.74 x 10⁻²⁰(baseball) : 1.90 x 10⁴ (electron) : 1 (alpha particle)

We can see the wavelength  of the baseball is very, very small compared to that of an electron and an alpha particle. For this small wavelength  we are not going to see effects such as diffraction or interference.This is the reason that for everyday macroscopic objects we do not talk about its associated wavelength. The wavelength can only be appreciated in  very small microscopic particles as exemplified for the cases of the electron and alpha particle in this question.

The wavelength of the baseball cannot be detected so a placement in the electromagnetic spectrum is undefined.

The wavelength of the electron in this question will fall into the x ray region of the spectrum (   region  around 10⁻⁹ to 10⁻¹² ) and the alpha particle will fall beyond the gamma rays ( that is wavelength shorter than 10⁻¹² m ).

3 0
3 years ago
What is the cause of rising surface temperatures of the Pacific Ocean, drought in the Western United States, flooding on the pac
stira [4]
Pretty sure it's D. El Nino but not positive.
8 0
3 years ago
electric current is passed through water, it decomposes inti hydrogen and oxygen. write full balanced chemical equation for the
Tems11 [23]

Answer:

2H2O ------------------] 2H2 + O2

6 0
3 years ago
Which of the following gases would have the greatest kinetic energy at 300 K?
tekilochka [14]

Answer:

D. All of them would have the same kinetic energy

Explanation:

The expression for the kinetic energy of the gas is:-

K.E.=\frac{3}{2}\times K\times T

k is Boltzmann's constant = 1.38\times 10^{-23}\ J/K

T is the temperature

<u>Since, kinetic energy depends only on the temperature. Thus, at same temperature, at 300 K, all the gases which are N_2,\ NH_3\ and\ Ar will posses same value of kinetic energy.</u>

4 0
3 years ago
Other questions:
  • Calculate the number of moles and the mass of the solute in each of the following solutions:(a) 2.00 L of 18.5 M H2SO4, concentr
    9·1 answer
  • what is the volume occupied by 0.118 mol of helium gas at a pressure of 1.05 atm and a temperature of 322 K?
    12·1 answer
  • Which of the following is true regarding nuclear fission and nuclear fusion?
    5·2 answers
  • 63<br> 84/<br> 85<br> 86<br> 87/<br> 88<br> 891<br> 901<br> 911<br> 921
    13·1 answer
  • What mass of oxygen would be produced upon thermal decomposition of 25 g of potassium chlorate (kclo3)? the molecular weight (mw
    7·1 answer
  • Tell whether the statement is TRUE or FALSE. This symbol means every element is in both sets (A ⊆ B).
    5·1 answer
  • Question 2 of 10 A scientist is interested in designing an alternative cancer treatment involving a less harmful type of radiati
    14·1 answer
  • Help!!
    12·2 answers
  • What law deals with volume and pressure
    13·1 answer
  • Select oxidation numbers for the metals in each of the following coordination compounds. (a)K[Au(OH)4] (b)Na4[Fe(Cl)6]
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!