8. X is an unknown element at 1000 °C and 10.0 mmHg has a density of 8.8 x 104 g/L in gaseous state. The element is: A. B B. Na C. Li D. K

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter8: Properties Of Gases
Section: Chapter Questions
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8. X is an unknown element at 1000 °C and 10.0 mmHg has a density of 8.8 * 104 g/L in
gaseous state. The element is:
A. B
B. Na
C. Li
D. K
9. 1.0 mol of gas occupies 22.4 L at STP. What is the volume at 30.0 °C and 670 mm Hg?
A. 0.037L
B. 28.2 L
C. 25.8L
D. 0.034 L
in a hydrogen atom
10. The wavelength in nm unit of light emitted when the electron
undergoes a transition from energy level n = 6 to level n = 1 is:
A. 410.6 x 106 nm B. 9.4 x 10-8 nm
C. 93.8 nm
D. 38 nm
Transcribed Image Text:8. X is an unknown element at 1000 °C and 10.0 mmHg has a density of 8.8 * 104 g/L in gaseous state. The element is: A. B B. Na C. Li D. K 9. 1.0 mol of gas occupies 22.4 L at STP. What is the volume at 30.0 °C and 670 mm Hg? A. 0.037L B. 28.2 L C. 25.8L D. 0.034 L in a hydrogen atom 10. The wavelength in nm unit of light emitted when the electron undergoes a transition from energy level n = 6 to level n = 1 is: A. 410.6 x 106 nm B. 9.4 x 10-8 nm C. 93.8 nm D. 38 nm
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