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stellarik [79]
3 years ago
8

During the period from about 1800 to about 1865, the atomic weights of many elements were accurately measured. Why was this impo

rtant to Mendeleev's formulation of the periodic table?
Chemistry
1 answer:
tatiyna3 years ago
4 0
I believe Mendeleev formed his periodic table by atomic weight (nowadays we do it by atomic number) so he likely used those values.
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Explanation:

The mass of one atom of calcium is the same as the molar mass of the calcium. Also, the atomic mass of calcium is 40.078 g/mol.

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In which solid sound travel faster than any others.ans me pls​
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THE SOUND TRAVELS FASTER IN SOLIDS BECAUSE ITS MOLECULES ARE CLOSE TO EACH OTHER WHILE LIQUIDS MOLECULES ARE NOT TIGHT AS OF SOLID AND IN GAS THE MOLECULES ARE FREE

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Where on the table would a group's<br> ionization energy be the greatest?
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upper left

Explanation:

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A sample of oxygen occupies 20.1 liters under a pressure of 1520 torr at 25.0o What volume would it occupy at 25.0oC if the pres
Zolol [24]

Answer:

The volume that the sample of oxygen would occupy at 25 ° C if the pressure were reduced to 760.0 torr is 40.2 L

Explanation:

Boyle's law establishes the relationship between the pressure and the volume of a gas when the temperature is constant, so that the pressure of a gas in a closed container is inversely proportional to the volume of the container. That is, if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

or P * V = k

Considering an initial state 1 and a final state 2, it is true:

P1* V1= P2*V2

In this case:

  • P1= 20.1 L
  • V1= 1520 torr
  • P2= 760 torr
  • V2= ?

Replacing:

20.1 L* 1520 torr= 760 torr* V2

Solving:

V2=\frac{20.1 L* 1520 torr}{760 torr}

V2= 40.2 L

<em><u>The volume that the sample of oxygen would occupy at 25 ° C if the pressure were reduced to 760.0 torr is 40.2 L</u></em>

<em><u></u></em>

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3 years ago
HELP I DON'T HAVE MUCH TIME PLZ HELP ME IF YOU ARE REALLY GOOD AT SCIENCE COME TO MY QUESTION PLEASEEEE Which fossil fuel create
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Hey there!
The correct answer is C

Hope this helps you!

Always remember, you are a Work Of Art!
- Nicole :) <3
6 0
4 years ago
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