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3 years ago

What does it mean for a substance to have high reactivity?

2 answers:

8 0

Reactivity is the tendency of a substance to undergo chemical reaction, either by itself or with other materials, and to release energy.

ki77a [65]3 years ago

6 0

Answer: Option (a) is the correct answer.

Explanation:

When we say that a substance has high reactivity then it means the substance is able to react readily with another substance.

For example, atomic number of potassium is 19 and its electronic distribution is 2, 8, 8, 1.

Since, it has only one valence electron and to attain stability it just needs 8 electrons in its valence shell. So, it will readily lose its 1 valence electron and thus become very much reactive in nature.

Thus, we can conclude that for a substance to have high reactivity it means that it reacts easily with other substances.

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Interstellar space has an average temperature of about 10 K , and an average density of hydrogen atoms of about one hydrogen ato

Bas_tet [7]

Answer:

$2.2508\times 10^{19} m$ meter the mean free path of hydrogen atoms in interstellar space.Explanation:

The mean free path equation is given as:

$\lambda =\frac{1}{\sqrt{2}\pi d^2 n}$

Where"

d = diameter of hydrogen atom in meters

n = number of molecules per unit volume

We are given: d = 100 pm = $100\times 10^{-12}= 10^{-10} m$

$n = 1 m^{-3}$

$\lambda =\frac{1}{\sqrt{2}\pi (10^{-10} m)^2\times 1 m^{-3}}$

$\lambda =2.2508\times 10^{19} m$

$2.2508\times 10^{19} m$ meter the mean free path of hydrogen atoms in interstellar space.

7 0

3 years ago

Write the ground state electron configuration of zn using the noble-gas shorthand notation.

V125BC [204]

Atomic Number of Zinc is 30, means it contains 30 electrons. So, its electronic configuration is as follow,

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰
As,
1s², 2s², 2p⁶, 3s², 3p⁶ = Argon
So,
Electronic configuration of Zinc in shorthand notation is as follow,

[Ar] 4s², 3d¹⁰

8 0

3 years ago

Consider the following mechanism.

solong [7]

Answer :

(a) The overall equation is:

$ClO^-(aq)+I^-(aq)\rightarrow Cl^-(aq)+IO^-(aq)$

(b) The intermediates are :

$OH^-(aq),HClO(aq)\text{ and }HIO(aq)$

Explanation :

(1) $ClO^-(aq)+H_2O(l)\rightarrow HClO(aq)+OH^-(aq)$ (fast)

(2) $I^-(aq)+HClO(aq)\rightarrow HIO(aq)+Cl^-(aq)$ (slow)

(3) $OH^-(aq)+HIO(aq)\rightarrow H_2O(l)+IO^-(aq)$ (fast)

By adding the three equations and cancelling the common terms on both side, we will get the overall equation.

$ClO^-(aq)+I^-(aq)\rightarrow Cl^-(aq)+IO^-(aq)$

Intermediates are generated and consumed in the mechanism and do not include in the overall equation.

Since, intermediates will not include in the overall mechanism.

The intermediates are :

$OH^-(aq),HClO(aq)\text{ and }HIO(aq)$

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3 years ago

Which is a derived unit?

Step2247 [10]

Answer:

derived unit. noun. a unit of measurement obtained by multiplication or division of the base units of a system without the introduction of numerical factors.

Explanation:

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2 years ago

A hydrate is typically a crystalline compound in which water molecules are chemically bound to another compound or an element.

dedylja [7]

Answer:

Subtract the mass of the CuSO4⋅ 5H2O from the mass of CuSO4 is the right one

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3 years ago