Question

1) The SI unit of pressure is

a. torr

b. mmMg (millimeters of mercury)

d. Pa (Pascal)

e. bar

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2) What is the key difference between a barometer and a manometer?

a. barometers are automated pressure measuring devices, while manometers are hand-operated (hence the prefix "man-")

b. barometers are an older term for manometer

c. barometers measure atmospheric pressure while manometers measure the pressures of a sample

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3) Often during a storm pressure will drop. If the pressure drops to 90.411 kPa, what will the height of mercury be, in meters, in a barometer tracking weather patterns?

a. 0.67813 m

b. $LaTeX: 9.33\times 10^4 \text{ }\frac{\text{kg}}{\text{m}^3}$ (9.33×10^44 kg/m3)

c. 93.3 m

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4) The difference between the "combined gas law" (at the end of section 11.4) and the "ideal gas law" (at the beginning of section 11.5) is

a. you cannot change the number of moles, n, in the combined gas law, but you can in the ideal gas law

b. the combined gas law relies on proportionalities while the ideal gas law introduces a proportionality constant, R

c. the combined gas law works equally well on ideal and real gases, while the ideal gas law only applies to ideal gases

d. there is no difference; the ideal gas law is just a rearrangement of the combined gas law

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5) Standard temperature and pressure, commonly abbreviated to STP, tells you what about the conditions?

a. pressure is 1 bar and temperature is 0 Kelvin

b. pressure is 1 atmosphere and temperature is 25 degrees celsius

c. pressure is 101,325 Pascals and temperature is 25 degrees Celsius

d. pressure is 1 atmosphere and temperature is 0 degrees celsius

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6. Calculate the density of carbon dioxide gas, in units of g/mL, at STP.?

a. $LaTeX: 1.799\times 10^{-3}$ 1.799×10−3

b. $LaTeX: 2.117\times 10^{-4}$ 2.117×10−4

c. $LaTeX: 1.938\times 10^{-5}$ 1.938×10−5

d. $LaTeX: 1.963\times 10^{-3}$

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7) Take a look at Table 11.5 in your text. Which of the following gases would you characterize as having the least ideal behavior (deviates the most from the ideal gas law)?

a. $LaTeX: \text{O}_2$O2

b. $LaTeX: \text{Xe}$Xe

c. $LaTeX: \text{He}$He

d. $LaTeX: \text{Cl}_2$

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8) At low temperatures, gases often behave non-ideally. Calculate the pressure, in atm, inside of a 4.00 L container that has 5.00 moles of ammonia gas at -100.0 $LaTeX: ^\circ \text{C}$ ∘ C.

(NON MULTIPLE CHOICE)

Answer 1

pressure is D. The si unit of d) Pa (Pascal) foree area Pressure - unit of foree of force inst is Newton (N) and whit of area in SI is So, Pressure ma N -Pa so, SI unit of pressue is pa cs Scanned with CamScanner