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Physical Chemistry
__________ forms an oxide also known as heavy water
Protium
Tritium
Deutrium
Neutrium
Protium
Tritium
Deutrium
Neutrium
Physical Chemistry
volume of a gas including the dust particles at stp is 100cubic cm.volume becomes double at 127 degree celsius and 0.2 atm pressure.whats the volume of dust particles?if the gas is carbon di oxide,what will be its mass?
Physical Chemistry
In the reaction A+2B=⟶2C, if 2 moles of A, 3 moles of B, and 2 moles of C are placed in a 2 litre flask and the equilibrium concentration of C is 0.5 mole/litre, what is the equilibrium constant (Kc) for the reaction?
Physical Chemistry
What is the Doppler-shifted wavelength of a red (680 nm) traffic light approached at 60 km/h?
Physical Chemistry
One molecule of haemoglobin, Hb, can bind with four molecules of oxygen according to the
following equation.
Hb(aq) + 4O2(aq) Hb(O2)4(aq)
When the equilibrium concentration of O2 is 7.6 × 10–6moldm–3, the equilibrium concentrations of
Hb and Hb(O2)4 are equal.
What is the value of Kc for this equilibrium?
following equation.
Hb(aq) + 4O2(aq) Hb(O2)4(aq)
When the equilibrium concentration of O2 is 7.6 × 10–6moldm–3, the equilibrium concentrations of
Hb and Hb(O2)4 are equal.
What is the value of Kc for this equilibrium?
Physical Chemistry
What is mole fraction of water in 250g of pure water?
Physical Chemistry
claculate diffrerence between heat of reaction at constant pressure and constant volume in KJ at 25degree celcius
2C6H6(l)+15O2(g) gives 12CO2(g)+6H2O(l)
2C6H6(l)+15O2(g) gives 12CO2(g)+6H2O(l)
Physical Chemistry
16 Equilibrium is a state of dynamic molecular behaviour, meaning that
the reaction eventually comes to a stop.
products continually turn into reactants at a progressively faster rate.
reactants turn into products and products turn into reactants at
different rates.
reactants turn into products and products turn into reactants at equal
rates
17 The reaction below is exothermic: $2SO_2 (g) + O_2 (g) \rightarrow
2SO_3 (g)$. Le Chatelier's Principle predicts that __________ will
result in an increase in the number of moles of $SO_3$ (g) in the
reaction container.
removing some oxygen
decreasing the pressure
increasing the pressure
increasing the volume of the container
the reaction eventually comes to a stop.
products continually turn into reactants at a progressively faster rate.
reactants turn into products and products turn into reactants at
different rates.
reactants turn into products and products turn into reactants at equal
rates
17 The reaction below is exothermic: $2SO_2 (g) + O_2 (g) \rightarrow
2SO_3 (g)$. Le Chatelier's Principle predicts that __________ will
result in an increase in the number of moles of $SO_3$ (g) in the
reaction container.
removing some oxygen
decreasing the pressure
increasing the pressure
increasing the volume of the container
Physical Chemistry
18 When extra NH3 is added to the following system at equilibrium:
$3H_2(g) + N_2(g) \rightarrow 2 NH_3(g)$, what happens?
In order to restore equilibrium, the reaction shifts left, toward
reactants
In order to restore equilibrium, the reaction shifts right, toward product
No change occurs
Concentration of hydrogen decreases, but that of hydrogen increases
19 A beaker with a mixture of ice and water is maintained at
equilibrium: $H_2O(s) + heat \rightarrow H_2O(l)$; If the temperature of
the system is decreased:
Water freezes to form ice (shifts to the left)
Ice melts to form liquid water (shift to the right)
The container cacks
No change occurs
20 For the following system at equilibrium, what will cause the partial
pressure of HF to increase? $UO_2(s) + 4 HF(g) \rightarrow UF_4(g) + 2
H_2O(g)$
adding $UO_2$(s)
adding $UF_4(g)$
decreasing the pressure
removing $H_2O(g)$
$3H_2(g) + N_2(g) \rightarrow 2 NH_3(g)$, what happens?
In order to restore equilibrium, the reaction shifts left, toward
reactants
In order to restore equilibrium, the reaction shifts right, toward product
No change occurs
Concentration of hydrogen decreases, but that of hydrogen increases
19 A beaker with a mixture of ice and water is maintained at
equilibrium: $H_2O(s) + heat \rightarrow H_2O(l)$; If the temperature of
the system is decreased:
Water freezes to form ice (shifts to the left)
Ice melts to form liquid water (shift to the right)
The container cacks
No change occurs
20 For the following system at equilibrium, what will cause the partial
pressure of HF to increase? $UO_2(s) + 4 HF(g) \rightarrow UF_4(g) + 2
H_2O(g)$
adding $UO_2$(s)
adding $UF_4(g)$
decreasing the pressure
removing $H_2O(g)$
Physical Chemistry
16 Equilibrium is a state of dynamic molecular behaviour, meaning that
the reaction eventually comes to a stop.
products continually turn into reactants at a progressively faster rate.
reactants turn into products and products turn into reactants at
different rates.
reactants turn into products and products turn into reactants at equal
rates
17 The reaction below is exothermic: $2SO_2 (g) + O_2 (g) \rightarrow
2SO_3 (g)$. Le Chatelier's Principle predicts that __________ will
result in an increase in the number of moles of $SO_3$ (g) in the
reaction container.
removing some oxygen
decreasing the pressure
increasing the pressure
increasing the volume of the container
the reaction eventually comes to a stop.
products continually turn into reactants at a progressively faster rate.
reactants turn into products and products turn into reactants at
different rates.
reactants turn into products and products turn into reactants at equal
rates
17 The reaction below is exothermic: $2SO_2 (g) + O_2 (g) \rightarrow
2SO_3 (g)$. Le Chatelier's Principle predicts that __________ will
result in an increase in the number of moles of $SO_3$ (g) in the
reaction container.
removing some oxygen
decreasing the pressure
increasing the pressure
increasing the volume of the container
