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4 years ago

Which is another name for groups of elements

Chemistry

2 answers:

DENIUS [597]4 years ago

5 0

They are called group or family

Kruka [31]4 years ago

4 0

Answer is: another name for groups of elements is family.

There are 18 numbered groups in the periodic table.

The elements in a group have similar physical or chemical characteristics and some groups have a specific name, for example group 17 (the halogens).

Elements in the group have the same number of valence electrons, for example, chemical elements in group 15 of the periodic table have neutral atom with a valence electron configuration of ns²np³.

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Enter your answer in the provided box. The vapor pressure of ethanol is 1.00 x 10² mmHg at 34.90°C. What is its vapor pressure a

zavuch27 [327]

Answer:

2,54x10² mmHg

Explanation:

To solve this problem you can use Clausius-Clapeyron equation that serves to estimate vapor pressures or temperatures:

$Ln(\frac{P_{2}}{P_{1}} ) =\frac{ deltaH_{vap}}{R} (\frac{1}{T_{1}}-\frac{1}{T_{2}} )$

Where:

P1 is 1,00x10² mmHg

ΔHvap is 39,3 kJ/mol

R is gas constant 8,314x10⁻³ kJmol⁻¹K⁻¹

T1 is 34,90°C + 273,15 = 308,05 K

T2 is 54,81°C + 273,15 = 327,96 K

Thus:

$Ln(\frac{P_{2}}{1,0x10^{2}mmHg}) =\frac{39,3kJ/mol}{8,314x10^{-3}kJ/molK} (\frac{1}{308,05K}-\frac{1}{327,96K} )$

Thus, P2 is <em>2,54x10² mmHg</em>

I hope it helps!

3 0

4 years ago

Los neutrones tienen carga eléctrica———-y masa de ——una

3241004551 [841]

Answer:

thanks for your points

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3 years ago

Are the 14 transition metals that follow lanthanum in the periodic table.

klio [65]

Answer: Lanthanide or Lanthanides

Explanation: Sorry that I don’t have an explanation. I just answered the question correctly myself. <33

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amm1812

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djyliett [7]

Answer:

I'm not sure

Explanation:

I'm just not sure

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2 years ago