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
Gnom [1K]
2 years ago
7

How many atoms are in 8.66 moles of barium? Round your answer to 2 decimal places.

Chemistry
1 answer:
yarga [219]2 years ago
3 0

Answer:

52.15 × 10²³ atoms

Explanation:

Given data:

Number of moles = 8.66 mol

Number of atoms = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

1 mole = 6.022 × 10²³ atoms

8.66 mol × 6.022 × 10²³ atoms / 1mol

52.15 × 10²³ atoms

You might be interested in
I need help with the question they are asking
Ierofanga [76]

Answer:

i wish i could help but people are around me

Explanation:

5 0
3 years ago
Describe how light is emitted from an atom. A) As protons absorb energy they travel from the nucleus through the atom emitting l
vovangra [49]

Answer is: D) Light is emitted from an atom as an electron falls from an excited state to the ground state releasing a photon.

Electrons can jump from one energy level to another, absorbing or emitting electromagnetic radiation with a frequency ν (energy difference of the levels).

When electron jump from higher to lower energy level (shell), it emitting (releasing) energy.

For example, when the electron changes from n=4 (fouth shell) to n=2 (second shell), the photons are emitted.

Albert Einstein (1879-1955) proposed that a beam of light is a collection of discrete wave packets (photons) with energy hν, where h is Planck constant and ν is frequency.

The photons have a characteristic energy proportional to the frequency of the light.

Minimum frequency or the threshold frequency is energy below which no photoelectrons are emitted.  

Above the minimum frequency, energy depends on the frequency of the light, not on the intensity of the light.

7 0
3 years ago
Need help asap! A 200 L balloon is blown up inside at 100 K. It is then taken outside in the hot sun and heated to 400K. What is
liq [111]
<h2>Answer</h2>

The volume will be<u> 50 L</u>

<h2>Explanation</h2>

From Kelvin Law of Temperature, we know that

V_{1} T_{1} =V_{2} T_{2}

We know that

V_{1} = 200 L

T_1 = 100 K

T_2= 400 K

So,

V_{2} = V_{1} T_{1}/T_{2}

V_{2} = 200*100/400

V_{2} = 50 L

The answer of the givern question is 50L


5 0
3 years ago
Read 2 more answers
Why is the pressure 101.3kPa significant
nydimaria [60]

Answer:

Explanation:

The kPa-kilopascal is the unit of pressure. It was named after Blaise Pascal, a mathematician and physicist.

The kPa is 1000Pa. Kilo stands for 1000. Now what is a pascal?

A pascal is the amount of force(Newton) exerted per unit area.

            1Pa = 1Nm⁻²

At the standard atmospheric level, the pressure is 101.325 x 10³ Nm⁻² i.e the atmosphere exerts a pressure of 101.325 x 10³N in an area of a body.

This unit is used to calculate pressure. It can be converted to other units.

3 0
3 years ago
Which would make it hard to draw a conclusion
lawyer [7]
B.


Hehkrkdkfkggmvmmg
Mdmdkkdkdskksksk
6 0
3 years ago
Other questions:
  • Need Help Please, ASAP:
    8·2 answers
  • How does the chemical formula relate to the number of particles that result from the dissociation of molecule?
    9·1 answer
  • Balance each equation by entering the correct coefficients.
    8·1 answer
  • What percent of magnesium bromide, MgBr2, is magnesium?
    9·1 answer
  • What is the average rate of the reaction between 10 and 20 s?
    11·1 answer
  • You need to decontaminate water cans previously used for nonpotable water. You calculate that five gallons of disinfecting solut
    6·1 answer
  • 3. How are the protons held in the
    9·1 answer
  • Select the correct answer.
    9·2 answers
  • What kind of salts are formed if you react metals carbonates with sulphuric acid?
    8·2 answers
  • Explain why some substances travel further than others.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!