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Calculate the mole fraction of solute in the aqueous solution of 13% C2H5OH.
What volume did a helium-filled balloon have at 26.8 °C and 1.87 atm if its new volume was 63.2 mL at 2.22 atm and 9.6°C? O a. 79.6 O b. 209 O c. 70.7 O d. 56.5
a) Draw a displayed formula for the carboxylic acid that contains three carbon atoms. Give the name of this compound. (2 marks)
b) Draw a skeletal formula for a ketone that contains five carbon atoms. Give the name of this compound. (2 marks)
c) Your answer to part (d) is only one possible isomer. Give a definition of isomerism and state the type of isomerism that can occur for the ketone described in part (d). (2 marks)
d) Name and describe one other type of isomerism different to that discussed in part (e). (2 marks)
e) Draw two isomers of the type you described in part (f) and name them.
Balance the following redox reactions: (8pts, 4pts each)
a) Cu (s) + NO3- (aq) à Cu2+(aq) + NO (g) (acidic medium)
Oxidation Half Reaction:
Reduction Half Reaction:
Net Reaction:
b) MnO4- (aq) + NO2-(aq) à Mn2+ (s) + NO3- (aq) (basic medium)
Oxidation Half Reaction:
Reduction Half Reaction:
Net Reaction:
Pls Help me
Assign oxidation number to all atoms in each of the following: (10pts)
- AuCl3 Au = ____ Cl = ____
- H2O2 H = ____ O = ____
- O3 O = ____
- Na2C2O4 Na = ____ C = ____ O = ____
- SO3 S = ____ O = ____
4. A concentration cell is constructed by placing identical Cu electrodes in two Cu2+ If the concentrations of the two Cu2+solutions are 1.0 M and 0.0020 M, calculate the potential of the cell. (3pts)
5. Calculate the potential (in volts) for the voltaic (or galvanic) cell indicated at 25o (3pts)
Ga | Ga3+ (10-6 M) || Ag+ (10-4 M) | Ag
Treatment of a 0.25000-g sample of impure potassium chloride with an excess of AgNO3 resultion of 0.2912g of AgCl. Calculate the percentage of CCl in the sample.
In a hypothetical element, two energy levels are separated by an energy of 282 kJ mol-1. What wavelength of light (in nm) is involved for an electron to change between these two levels?
Application of Charles’ Law can be seen as one flies in a hot air balloon, when heated, causes the air to expand; thus, becomes lighter and so it rises. Which of the following is another application of Charles’ Law?
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1 point
A balloon contains a mixture of 3 gases: oxygen, helium, and nitrogen. If the partial pressures of the three gases in the balloon are 25 atm of O2, 7,600 torr of N2, and 20 atm of He, What is the total pressure inside the balloon?
An electrochemical cell consists of a nickel electrode in an acidic solution of 1.00M Ni(No3)2 connected by a salt bridge for a second component with na Al electrode in acidic solution of 1M Alcl3. Calculate the change in voltage when the cell described above has initial conc of 0.500M Ni(No3)2 and 0.750 M Alcl3?
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#340153 on Dec 2023