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4 years ago

The elements that do not ordinarily form compounds are

2 answers:

8 0

Noble gases to do usually form compounds because they are not reactive and also stable with a full octet, which means they do not need anymore valence electrons in their outer shell.

anygoal [31]4 years ago

4 0

Noble gases, the have all 8 valence electrons so they do not have a need to bond

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lord [1]

Answer:

$\boxed{6.08 \times 10^{23}}$

Explanation:

Data:

I = 2.15 A

t = 8 min 24 s

T = 26.0 °C

V = 65.4 mL

p = 774.2 To

1. Write the equation for the half-reaction

2H₂O ⟶ O₂ + 4H⁺ + 4e⁻

2. Calculate the moles of oxygen

$p = \text{774.2 To} \times \dfrac{\text{1 atm}}{\text{760 To}} = \text{1.0187 atm}$

V = 0.0654 L

T = (26.0 + 273.15) K = 299.15 K

$\begin{array}{rcl}pV& = & nRT\\1.0189 \times 0.0654 & = & n \times 0.08206 \times 299.15\\0.06662 & = & 24.55n\\\\n & = & \dfrac{0.06662}{24.55}\\\\n & = & 2.714 \times 10^{-3}\\\end{array}$

3. Calculate the moles of electrons

$\text{n} = \text{2.714 $\times 10^{-3}$ mol oxygen} \times \dfrac{\text{4 mol electrons}}{\text{ 1 mol ozygen}} = \text{ 0.01086 mol electrons}$

4. Calculate the number of coulombs

t = 8 min 24 s =504 s

Q = It = 504 s × 2.10 C·s⁻¹= 1058 C

5. Calculate the number of electrons

$\text{No. of electrons} = \text{1058 C} \times \dfrac{\text{1 electron}}{1.602 \times 10^{-19}\text{ C}} = 6.607 \times 10^{21}\text{ electrons}$

6. Calculate Avogadro's number

$N_{\text{A}} = \dfrac{6.607 \times 10^{21}}{0.01086} = \mathbf{6.08 \times 10^{23}}\\\\\text{The experimental value of Avogadro's number is } \boxed{\mathbf{6.08 \times 10^{23}}}$

3 0

4 years ago

Which salt is produced when NH4OH reacts with HNO3?<br> KNO2<br> NaNO3<br> NH4NO3<br> NH4NO2

xenn [34]

Answer:

NH4NO3 is the answer

Explanation:

Please mark as brainliest

4 0

3 years ago

Read 2 more answers

Which of the following could have the electron configuration 2.8?

olya-2409 [2.1K]

Answer:

Sodium, Oxygen and Neon

7 0

3 years ago

Read 2 more answers

Give the correct balanced equation for the single replacement reaction of magnesium with aluminum oxide.

Leni [432]

<h3><u>Answer;</u></h3>

C. 3Mg + Al2O3 → 3MgO + 2Al

<h3><u>Explanation;</u></h3>

<u><em>Single replacement reaction is a type of reaction which one reactant reacts with another and makes a product by replacing one element by another. </em></u>
Mg (Magnesium) reacts with Al₂O₃ (Aluminium oxide) and produces MgO (Magnesium oxide) and Al (Aluminium) as products. Here Al is replaced by Mg. Reaction is

Mg + Al₂O₃ → MgO + Al

To balance the reaction equation, both left and right hand sides should have same number of atoms in each element.

The balanced equation will be;

3Mg + Al2O3 → 3MgO + 2Al

5 0

3 years ago

Read 2 more answers

A neutron collides with a nitrogen atom, resulting in a transmutation. Balance the equation. Superscript 1 Subscript 0 Baseline

o-na [289]

Answer:

A is 14

Z is 6

X is C

Explanation:

Have a great day!

7 0

3 years ago