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(i) Express 5% pa effective interest as a nominal annual interest rate convertible quarterly.
(ii) Find the annual effective interest rate equivalent to a nominal interest rate of 12% pa convertible four-monthly.
How many moles of gas are there in a sample occupying 1.74 L at 0.136 atm and 25°C? [1] 0.00968 mol
[2] 0.0463 mol
[3] 0.0926 mol
[4] 7.36 mol
[5] None of the above
What is the density of CO2 at 25°C and 750 Torr?
[1] 0.472 g/L [2] 1.78 g/L
[3] 1.82 g/L
[4] 2.12 g/L
[5] None of the above
media and social media for a false argument aimed at education in South Africa. In 100-150
words, explain, using concepts related to critical rationalism AND empiricism, why it is a false argument and how we can go about getting to the truth of the matter.
A flask of 7L contains a mixture of 6g of O2 and 15g of N2 at 30°C.What is the partial pressure of the oxygen gas?
[1] 0.67 atm
[2] 1.9 atm
[3] 2.59 atm
[4] 22.1 atm
[5] None of the above
A 1.00 L flask contains 2.073 g O2 and 20.13 g N2 at 25.0°C. What is the total pressure? [1] 0.856 atm
[2] 1.09 atm
[3] 19.2 atm
[4] 22.2 atm
[5] None of the above
For a gas, which two variables are inversely proportional to each other (if all other conditions remain constant)?
[1] Pressure and temperature
[2] Pressure and volume
[3] Volume and temperature
[4] Amount (number of moles) and volume
[5] Pressure, temperature and volume
Which of the following statements is most likely a characteristic of an authoritarian government in Africa?
A 3.20 mol sample of a gas occupies a volume of 350 mL at 300.0 K. What is its pressure?
[1] 1.32 atm
[2] 67.0 atm
[3] 184 atm
[4] 225 atm
5] 312 atm
What is the partial pressure of oxygen in a container that contains 2.0 mol of oxygen, 3.0 mol of nitrogen, and 1.0 mol of carbon dioxide when the total pressure is 900 Torr?
[1] 100 Torr
[2] 200 Torr
[3] 300 Torr
[4] 400 Torr
[5] None of the above
