Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:6) Calculate the volume in liters of each of the following quantities of gas at STP:
a) 6.72 g CH;
b) 0.588 g NH,
c) 1.47 kg CH,
7) Most mixtures of hydrogen gas with oxygen gas are explosive. However, a mixture
that contains less than 3% oxygen is not explosive. If enough oxygen is added to a
cylinder of hydrogen at 33.2 atm to bring the total pressure to 34.5 atm, is the mixture
explosive?
8) Given that pressure can be measured in several different units, and that 1 atmosphere
(atm) = 760 torr = 101.325 kiloPascals (kPa). If the atmospheric pressure is 740 torr,
what is the pressure in atmospheres and kilopascals?
9) A medical laboratory equipment catalog describes the pressure of a cylinder of gas as
being 14.82 MPa (1 MPa= 10 Pa). What is the pressure of this gas in atm and torr?
10) What is the difference between diffusion and effusion?
11) Graham's Law describes the rate of diffusion or effusion of a gas, relative to the type
of molecule, and can be written as follows: The rate of diffusion of a gas is inversely
proportional to the square root of it molecular mass. Write Graham's Law in
equation form.
12) What mass of nitrosyl chloride (NOCI) occupies a volume of 0.250 L at a temperature
of 325 K and a pressure of 113.0 kPa? What is the density of NOC1 under these
conditions?
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