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
Alenkasestr [34]
3 years ago
12

What is the mass of 1.63x10^21

Chemistry
1 answer:
krok68 [10]3 years ago
3 0

Answer:

7.60 x 10^-2 g.

You might be interested in
An atom with the same number of protons and electrons has charge of
xz_007 [3.2K]

Answer:

Explanation:

0

All the charges of the protons are cancelled out by all the charges on the electrons.

6 0
2 years ago
A path that an electric current followos is a
Fed [463]
The flow of electricity is an electric current. The path that an electric currents floes is a circuit.
7 0
3 years ago
Read 2 more answers
Hydrofluoric acid, hf, has a ka of 6.8 × 10−4. what are [h3o+], [f−], and [oh−] in 0.710 m hf?
STALIN [3.7K]

Answer:

[H₃O⁺] = [F⁻] = 2.2 x 10⁻² M. & [OH⁻] = 4.55 x 10⁻¹³.

Explanation:

  • For a weak acid like HF, the dissociation of HF will be:

<em>HF + H₂O ⇄ H₃O⁺ + F⁻.</em>

[H₃O⁺] = [F⁻].

<em>∵ [H₃O⁺] = √Ka.C,</em>

Ka = 6.8 x 10⁻⁴, C = 0.710 M.

∴ [H₃O⁺] = √Ka.C = √(6.8 x 10⁻⁴)(0.710) = 2.197 x 10⁻² M ≅ 2.2 x 10⁻² M.

<em>∴ [H₃O⁺] = [F⁻] = 2.2 x 10⁻² M.</em>

<em></em>

∵ [H₃O⁺][OH⁻] = 10⁻¹⁴.

<em>∴ [OH⁻] = 10⁻¹⁴/[H₃O⁺]</em> = 10⁻¹⁴/(2.2 x 10⁻²) = <em>4.55 x 10⁻¹³.</em>

6 0
2 years ago
Pls help me. Show proof on why it’s that answer.
natulia [17]
The answer is “the sustainability of the ecosystem” because if the ecosystem isn’t sustainable enough for many different organisms to live in it then the biological diversity of the ecosystem will decrease.
6 0
3 years ago
If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element? Atomic numbers
Bezzdna [24]

Answer:

Explanation:

Firstly, it should be noted that atomic number (number of protons) determines element. And the element with the atomic number 10 (10 protons) is Neon. Hence, Neon-10 (₁₀Ne) is the answer.

Note that sodium has an atomic number of 11. Also, number of protons is usually equal to the number of electrons in neutral atoms, this is because the total number of positive particles (protons) must be equal to the total number of negative particles (electrons) to give a neutral atom.

4 0
2 years ago
Other questions:
  • How do nonnumeric, or conceptual problems, differ from numeric problems
    15·2 answers
  • What is the wavenumber of the radiation emitted when a hydrogen
    8·1 answer
  • The energy that is transferred due to a temperature difference
    15·1 answer
  • 6. A 25.0-mL sample of 0.125 M pyridine is titrated with 0.100 M HCI. Calculate the pH
    7·1 answer
  • The focus of the earthquake is the:
    9·1 answer
  • A kilometer is much greater in distance then a millimeter true or false
    13·2 answers
  • The water cycle is the movement of water from Earth's surface to the atmosphere and back to Earth's surface. Why do many living
    7·2 answers
  • Please help ASAPPPPPPPPPPPPPPP
    8·1 answer
  • How many atoms of each element are in one molecule of the product?
    10·2 answers
  • Using bond lengths in Table 9.2 (p. 371) and assuming ideal geometry, calculate each of the following distances:
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!