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Principles of the living Matter A001809 2023-24

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For the following reaction: Br2

O

(g)  + 

H

2

O (g)  ↔  2 HBrO (g)    

 K

c

= 49.0 at a certain

temperature T. 

In a sealed container (V = 1.00 L), 96.9 g of HBrO is introduced,

the temperature is brought to T and the previous reaction occurs. Calculate the

molar concentration of Br

2

O at the equilibrium and its mole fraction

in the final mixture.

(2 pts.)

[Br2O]  M 
χ (Br2O)    

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For each of the following cases, establish if the resulting solution is acid, basic or neutral: (1.5 pts.)

  • 50 mL of 0.10 M hydrogen bromide + 50 mL of 0.10 M magnesium hydroxide:
  • 50 mL of 0.20 M sulfuric acid + 200 mL of 0.10 M potassium hydroxide: 
  • 50 mL of 0.20 M hydrogen chloride + 50 mL of 0.20 M ammonia: 

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Give the correct names to the following compounds: (1.5 pts.)

LiClO2    
FeO
CaH2

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A body, with an initial speed of 30 m/s, stops after traveling a distance of 15 m. How much is its acceleration worth?
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Suppose that an athlete has taken 10^6 J more than his daily requirement. Wanting to compensate for this caloric excess with an equivalent work done climbing a mountain, up to what height must climb the athlete knowing that he has a mass of 80 kg?
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Two resistors, R1=1000 ohms and R2=2000 ohms, are placed in parallel and the resistor R1 is traversed by a current of 12 A. Both converge into a resistor R3 = 400 ohms. The electric potential difference across the resistor R3 is worth
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Two bodies are dropped, with zero initial speed, from the top of two buildings and hit the ground with such speed that the first is equal to twice the second. Neglecting the frictional force with the air, what is the relationship between the respective heights of the two buildings?
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Calculate the work done during a Carnot cycle for an ideal reversible engine that operates between 300 K and 900 K and absorbs 1500 J from a hot reservoir.
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A uniform electric field of magnitude 3x10^5 N/C exerts a torque of 0.015 N m on an electric dipole. If the separation distance between the charges in the dipole is 5 cm, what is the magnitude of each charge in the dipole?
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Observing a wire, to which is attached a body of mass 150 g, it breaks when the angular velocity of the body reaches the value of 120 rad/s and the described circumference has radius 50 cm, the maximum tension developed by the wire is
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