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A student wants to investigate the effect of volume change on the equilibrium position of the reaction 2SO2(g) + O2(g) ⇄ 2SO3(g). The initial equilibrium concentration of SO3 is 0.1 M at a constant temperature. The volume is reduced by half at equilibrium. Calculate the new equilibrium concentrations of SO2, O2 and SO3 assuming the equilibrium constant (Kc) of the reaction remains constant.
asked
Jan 22
in
Chemical equilibrium
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63
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A sealed vessel contains a mixture of nitrogen dioxide and dinitrogen tetraoxide gases in equilibrium. If the volume of the container is increased, would the equilibrium shift towards more or less NO2? Calculate the new equilibrium constant at the new volume assuming the pressure and temperature remain constant.
asked
Jan 22
in
Chemical equilibrium
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131
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A chemistry student wants to find the concentration of a hydrochloric acid (HCl) solution. To do this, the student performs a titration experiment with a sodium hydroxide (NaOH) solution of known concentration. The student adds 25 mL of the HCl solution to a flask with an indicator, and then slowly adds the NaOH solution until the indicator changes color. It was found that it took 18.2 mL of the 0.1 M NaOH solution to reach the endpoint. What is the concentration of the HCl solution?
asked
Jan 22
in
Chemical reactions
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114
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A chemistry student needs to determine the composition of a sample that contains an unknown mixture of sodium chloride (NaCl) and potassium chloride (KCl). The student weighs 2.00 g of the mixture and dissolves it in water to obtain a solution. The student then precipitates the chloride ions from the solution with excess silver nitrate (AgNO3) to obtain 6.50 g of silver chloride (AgCl). Using mass balance calculations, determine the mass and percentage composition of the sodium chloride and potassium chloride in the mixture.
asked
Jan 22
in
Analytical Chemistry
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98
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A chemist has a sample of an unknown compound with a mass of 5.00 g. After analyzing the sample, the following results were obtained: 0.50 g of oxygen, 1.25 g of carbon, and 3.25 g of hydrogen. Calculate the molecular formula of the unknown compound using mass balance calculations.
asked
Jan 22
in
Analytical Chemistry
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1
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123
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According to Trait Theory, how does a leader possess certain inherent characteristics?
asked
Jan 20
in
Psychology
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1
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59
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When it comes to language processing, what is the role of the Wernicke's area?
asked
Jan 20
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Psychology
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1
answer
27
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What is cognitive linguistics?
asked
Jan 20
in
Psychology
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votes
1
answer
58
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When was the Structured Clinical Interview for DSM SCID first published?
asked
Jan 20
in
Psychology
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1
answer
39
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Compare and contrast solution-focussed brief therapy SFBT and motivational interviewing MI .
asked
Jan 20
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Psychology
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1
answer
40
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Who proposed the notion of post-traumatic growth?
asked
Jan 20
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Psychology
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1
answer
96
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How can persuasion be used to change a person's attitude?
asked
Jan 20
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Psychology
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1
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15
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When might cognitive-behavioural therapy be appropriate?
asked
Jan 17
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Psychology
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1
answer
134
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Why is attachment theory important in therapy?
asked
Jan 17
in
Psychology
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votes
1
answer
89
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What is the name of the experiment that looked at conformity to a group when the correct answer was obvious?
asked
Jan 17
in
Psychology
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1
answer
48
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When treating eating disorders, what is cognitive remediation therapy?
asked
Jan 17
in
Psychology
0
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0
answers
81
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When was Dr. Amanda Biggs' study published?
asked
Jan 17
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Psychology
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1
answer
42
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Who developed the behaviourist perspective?
asked
Jan 16
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Psychology
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1
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85
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Why is it important to understand the role of social influence in behaviour?
asked
Jan 16
in
Psychology
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1
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42
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What are correlation coefficients?
asked
Jan 16
in
Psychology
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