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
faltersainse [42]
2 years ago
12

The smallest atoms can themselves exhibit quantum-mechanical behavior. Calculate the de Broglie wavelength (in picometers) of a

hydrogen atom traveling at 490 m/s. Express your answer using three significant figures.
Chemistry
1 answer:
Sunny_sXe [5.5K]2 years ago
5 0

Answer:

810 pm

Explanation:

Step 1: Given and required data

  • Velocity of the atom (v): 490 m/s
  • Mass of a hydrogen atom (m): 1.67 × 10⁻²⁷ kg
  • Planck's constant (h): 6.63 × 10⁻³⁴ J.s

Step 2: Calculate the de Broglie wavelength of the hydrogen atom

We will use de Broglie's equation.

λ = h / m × v

λ = 6.63 × 10⁻³⁴ J.s / 1.67 × 10⁻²⁷ kg × 490 m/s = 8.10 × 10⁻¹⁰ m

Step 3: Convert 8.10 × 10⁻¹⁰ m to picometers

We will use the conversion factor 1 m = 10¹² pm.

8.10 × 10⁻¹⁰ m × 10¹² pm/1 m = 810 pm

You might be interested in
What characterizes a homogeneous mixture?
Vadim26 [7]
It has the same composition throughout, unlike a heterogeneous which has visibly separate substances
4 0
3 years ago
3. What are the Earth's Poles? *
WARRIOR [948]

Explanation:

I think the answer is 2nd

6 0
2 years ago
Read 2 more answers
Atoms of two adjacent elements in the third period are in the ground state. An atom of element A has only s electrons in its val
Dennis_Churaev [7]

Answer:

Explanation:

A is Magnesium, B is Aluminium both are adjacent element and lie in third period.

Magnesium with atomic number of 12 consist two s electrons in it's valence shell in ground state whereas, Aluminium which has atomic number of 13 consist three electrons in it's valence shell in the ground state out of which two are s electrons and only one p electron.

4 0
3 years ago
Match the salt with the acid and base used to form it in a neutralizing reaction.
nignag [31]
<h3><u>Answer;</u></h3>

K2SO4 - KOH and H2SO4

NaBr - NaOH and HBr

<h3><u>Explanation;</u></h3>
  • Salts are compounds that contain positively charged ions and negatively charged ions. That is; they consist of the positive ion of a base and the negative ion of an acid.
  • Salts may be produced when acids and bases are combined together in equal proportions, a process called neutralization.
  • During neutralization reactions an acid reacts with a base to form a salt and water as the only products.
4 0
3 years ago
Read 2 more answers
Which sentence best describes how scientists plan out their experiments?
malfutka [58]

Answer:

D

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • 425,000 mL = __ L in metric conversion
    12·1 answer
  • What is the best chemistry science fair project
    8·1 answer
  • Volume is the quantity of two-dimensional space occupied by a liquid, solid, or gas.
    14·2 answers
  • What does a red shift indicate about a galaxy?
    12·2 answers
  • Be sure to answer all parts. Sulfonation of benzene has the following mechanism: (1) 2 H2SO4 ⇌ H3O+ + HSO4− + SO3 [fast] (2) SO3
    13·1 answer
  • A 0.77 mg sample of nitrogen reacts with chlorine to form 6.615 mg of the chloride. part a what is the empirical formula of the
    11·2 answers
  • Uses of noble gases with description please. thanks
    9·1 answer
  • How much energy is released when 0.40 mol C6H6(g) completely reacts with oxygen? 2C6H6(g) + 15O2(g) --&gt;12CO2(g) + 6H2O(g)
    12·2 answers
  • 9. Which of the following concentrations has units of moles of solute per liter of solution?
    12·1 answer
  • Stock System naming for NaCl4, SO3, As2F4.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!