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Illusion [34]
2 years ago
10

The two elements discovered by Marie Curie are _____ and _____. uranium curium radium polonium

Chemistry
2 answers:
denpristay [2]2 years ago
5 0
Marie Curie discovered polonium and radium. Hope this helps:))) Please, mark Brainliest!
Savatey [412]2 years ago
3 0
Marie Curie discovered polonium and Radium.
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not be changed to balance an equationSubscripts are part of the chemical formula for reactants or products and can

Changing a subscript changes the substance represented by the formula

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Name some acids and in what and how we used them
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Answer:

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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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