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4 years ago

Carbon and silicon are tetravalent but ge sn pb show di valency. Why

Chemistry

1 answer:

Anuta_ua [19.1K]4 years ago

4 0

<u>Answer:</u>

Carbon and silicon both are tetravalent elements as compared to germanium, tin, and lead which are divalent.

That's because Ge, tin, and Pb show inert pair effect and has a greater nuclear effective charge on the 's' electrons due to poor shielding effect. .That's why these elements are not able to share their valence electrons while carbon and silicon does and show "catenation" which is the ability to form long chain molecules.

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What are The advantages of using scientific procedures in doing science experiments?

Studentka2010 [4]

Answer:

Doing experiments by scientific procedures is advantageous and helpful.

Explanation:

The scientific procedure should be followed while performing a experiment as it has many advantages like:

Working in safe environment: Performing a experiment by scientific procedure ensures the safety of the experimenter.

It reduces the chances of mistakes: The proper availability of the scientific equipment helps in reduction of the chances of the mistakes.

A sequence of steps is followed: A proper sequence of steps is followed to perform a experiment step by step. Performing experiment without scientific procedure may cause the experimenter to forgot a step.

More Accuracy: The readings of the experiment is more accurate by doing experiment by scientifically.

Chemical changes can be observed: The physical and chemical changes can be observed and can be measured by the lab equipment to perform more accurately.

less chance of risks: Performing in the safe scientific environment and using proper safety equipment reduces the chances of risks to the experimenter.

5 0

3 years ago

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

What is the most likely mode of decay for each?(c) ¹¹⁰₄₁4Ru

zmey [24]

The most likely mode of decay for a neutron-rich nucleus is one that converts a neutron into a proton.

<h3>What is radioactive decay?</h3>

The process through which an unstable atomic nucleus loses energy through radiation is known as radioactive decay, also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration. A substance that has unstable nuclei is regarded as radioactive. Alpha decay, beta decay, and gamma decay are three of the most frequent kinds of decay, and they all entail the emission of one or more particles. Beta decay is a result of the weak force, while the nuclear force and electromagnetism are in charge of the other two mechanisms. The capture of an inner electron from one of the electron shells by an unstable nucleus is the fourth prevalent form of decay.

To learn more about radioactive decay visit:

brainly.com/question/1770619

#SPJ4

6 0

2 years ago

How can I do single replacement equations? For example, Silver metal immersed in potassium nitrate solution to yield. . .

Darina [25.2K]

Single replacement means only 1 will bond. Ag + KNO3 --> AgNO3 + K
Just a rough sketch

5 0

3 years ago

kap26 [50]

Answer:

A they share two covalent bonds

8 0

3 years ago