12-15 please 12. A radioactive substance has a half-life of 24 years. If you begin with a 1000 g sample, how much of theoriginal sample remains after 48 years?13. True or False:a. Gases have a definite volume but an indefinite shape.b.Gases flow from regions of low pressure to regions of high pressure.c. Atmospheric pressure decreases as you increase in altitude.d. Gas pressure is defined as the force exerted by gas particles against the walls of thecontainer.14. Fill in the blank with "increases" or "decreases".a. When the volume of a gas decreases, the pressure.temperature and amount of gas do not change.)b. When the temperature of a gas decreases, the volumepressure and amount of gas do not change.)c. When the temperature of a gas increases, the pressure.volume and amount of gas do not change.)a.(Assuming the(Assuming the(Assuming the15. When the diaphragm relaxes it causes the volume of the lungs to decrease which increases the airpressure in the lungs. Does this increase in pressure cause the person to inhale or exhale? (Circle one)inhaleb. exhale

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12. A radioactive substance has a half-life of 24 years. If you begin with a 1000 g sample, how much of the original sample remains after 48 years?

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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12-15 please

12. A radioactive substance has a half-life of 24 years. If you begin with a 1000 g sample, how much of the
original sample remains after 48 years?
13. True or False:
a. Gases have a definite volume but an indefinite shape.
b.
Gases flow from regions of low pressure to regions of high pressure.
c. Atmospheric pressure decreases as you increase in altitude.
d. Gas pressure is defined as the force exerted by gas particles against the walls of the
container.
14. Fill in the blank with "increases" or "decreases".
a. When the volume of a gas decreases, the pressure.
temperature and amount of gas do not change.)
b. When the temperature of a gas decreases, the volume
pressure and amount of gas do not change.)
c. When the temperature of a gas increases, the pressure.
volume and amount of gas do not change.)
a.
(Assuming the
(Assuming the
(Assuming the
15. When the diaphragm relaxes it causes the volume of the lungs to decrease which increases the air
pressure in the lungs. Does this increase in pressure cause the person to inhale or exhale? (Circle one)
inhale
b. exhale

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