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bija089 [108]
2 years ago
15

11. Write down the molecular formula of following compounds by

Chemistry
1 answer:
Effectus [21]2 years ago
7 0

Answer:

a. <em><u>NH3</u></em>

<em><u>b</u></em><em><u>.</u></em>

<em><u>c.</u></em><em><u> </u></em><em><u>NaCl</u></em>

<em><u>d</u></em><em><u>.</u></em>

<em><u>e</u></em><em><u>.</u></em><em><u> </u></em><em><u>HCl</u></em>

<em><u>f</u></em><em><u>.</u></em><em><u> </u></em>

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What characteristics do the elements in a group share? In a period, share?
Katyanochek1 [597]

Answer:

The elements in same period have same principle quantum number or energy shell.

The elements in same group shows similar chemical and properties.

Explanation:

Inn group:

The elements in same group i.e present in vertical column shows similar chemical properties.

The elements in same group having same number of valance electrons. while in chemical reaction bonds are break and formed and valance electrons are involved. That's why elements in same group having same number of valance electrons and shows similar chemical properties.

In period:

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3 0
2 years ago
Calculate the volume of one mole of a gas at 1.00 atm pressure and 0 °C.
N76 [4]

Answer:

Solution:-

The gas is in the standard temperature and pressure condition i.e. at S.T.P

Therefore,

V

i

​

=22.4dm

3

V

f

​

=?

As given that the expansion is isothermal and reversible

∴ΔU=0

Now from first law of thermodynamics,

ΔU=q+w

∵ΔU=0

∴q=–w

Given that the heat is absorbed.

∴q=1000cal

⇒w=−q=−1000cal

Now,

Work done in a reversible isothermal expansion is given by-

w=−nRTln(

V

i

​

V

f

​

​

)

Given:-

T=0℃=273K

n=1 mol

∴1000=−nRTln(

V

i

​

V

f

​

​

)

⇒1000=−1×2.303×2×273×log(

22.4

V

f

​

​

)

Explanation:

6 0
2 years ago
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