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joja [24]
3 years ago
7

A mixture of helium, nitrogen and oxygen has a total pressure of 781 mmHg. The partial pressure of helium is 331 mmHg, and the p

artial pressure of nitrogen is 222 mmHg. What is the partial pressure (in mmHg) of oxygen in the mixture?
Chemistry
1 answer:
Andrews [41]3 years ago
4 0

Answer:

Partial pressure of O₂ =  228 mmHg

Explanation:

The mixture is made of three gases, He, N₂ and O₂.

Total pressure of it, is 781 mmHg.

There is a law from gases, that indicates the sum of partial pressures of each gas in a mixture will be the total pressure of the system. In conclussion:

Partial pressure of He + Partial pressure of N₂ + Partial pressure of O₂ = Total pressure.

331 mmHg + 222 mmHg + Partial pressure of O₂ = 781 mmHg.

Partial pressure of O₂ = 781 mmHg - 331 mmHg - 222 mmHg

Partial pressure of O₂ =  228 mmHg

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Identify which sets of quantum numbers are valid for an electron. Each set is ordered (n,ℓ,mℓ,ms).
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3 years ago
C=82.76% H=17.24% Molecular formula ???
san4es73 [151]

Answer:

ok

Explanation:

Element  %composition  Mol. mass  No. of C atoms  Simplest       Rounding

                                                                                           ratio             off  

C                     82.76                   12            6.89             1× 2                 2              

H                    17.24                      1              17.24              2.5× 2           5

Number of carbon atoms present =  

12

82.76

​  

=6.89

Number of hydrogen atoms present =  

1

17.24

​  

=17.24

simplest ratio =  

6.89

6.89

​  

=1  

simplest ratio =  

6.89

17.24

​  

=2.5

∴ Empirical fromula is C  

2

​  

H  

5

​  

 

Empirical formula mass= 2×12+5 = 29

∴ V.D. = 29

Mol. mass = 2 × V.D.

=58

n=  

Empiricalformulamass

Molecularmass

​  

 

=  

29

58

​  

=2

∴ Molecular formula = C  

4

​  

H  

10

​ <em>pls mark me as braillant</em>

5 0
3 years ago
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