A sample of helium Study guides, Class notes & Summaries
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TMC Practice Exam A + B Latest Versions 2024
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A 52 year-old post-operative cholecystectomy patient's breath sounds become more coarse upon completion of postural drainage with percussion. The respiratory therapist should recommend: 
 
A. Continuing the therapy until breath sounds improve. 
B. administering dornase alpha. 
C. administering albuterol therapy. 
D. deep breathing and coughing to clear secretions. - D. deep breathing and coughing to clear secretions. 
 
See Patient Assessment 
 
A healthy adult female can exhale what portion of...
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CHEM133 Week 15 Lesson 7 Quiz Questions and Answer
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1.	Question: A sample of oxygen gas has a volume of 3.52 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? 
2.	Question: Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? 
3.	Question: Gas A and gas B are combined in a flask at initial pressures of 1...
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ACS Gen Chem Practice Exam 77 Questions with Verified Answers,100% CORRECT
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ACS Gen Chem Practice Exam 77 Questions with Verified Answers 
 
Which is the strongest oxidizing agent? 
N a →← N a + + e - 2 . 7 1 V 
Cd →← Cd2+ + 2e- 0.40 V 
H2 →← 2H+ +2e- 0.00V 
Ag→← Ag++e- -0.80V 
(A) Na+ 
(B)H2 
(C) Cd0 
(D)Ag+ - CORRECT ANSWER Ag+ 
 
All are examples of Lewis acid-base reactions except 
Cu2+(aq) + 4NH3(aq) →← [Cu(NH3)4]2+(aq) 
HCl(g) + NH3(g) → NH4Cl(s) 
H+(aq) + OH-(aq) →← H2O(l) 
2Na(s) + Cl2(g) → 2NaCl(s) - CORRECT ANSWER 2Na + Cl2 ->...
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CEM 141 MSU Final Exam Questions & Answers Already Passed!!
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Consider the question: Is there an attractive force between a pencil and the earth? 
Is this a scientific question? [Yes or No] 
Because 
III. It can be tested and answered through observations and experiments 
IV. The answer is already known and we find it online 
V. There is no way to design an experiment to answer this question. - Answer-Yes because it can be 
tested and answered though observations and experiments 
Which of the following properties ascribed to atoms by the Greeks do we still...
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MCQ STATS FINAL EXAMQUESTIONS AND ANSWERS
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MCQ STATS FINAL EXAMQUESTIONS AND ANSWERS 
 
Researchers conducted a telephone survey of 427 adults living in a large city. The adults were asked whether they planned to purchase a smart watch in the next year. The table shows the responses categorized by the region of the city in which the residents live. 
*table* 
Which of the following graphical displays is most appropriate for preparing the proportions of those surveyed who plan to purchase a smart watch within the four regions? 
 
A scien...
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Exam 4 Chemistry 113 Exam Exam With 100% Correct Answers 2024
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Exam 4 Chemistry 113 Exam Exam With 
100% Correct Answers 2024 
Boyle's Law: what quantity relating pressure P and volume V is constant? - answerP X V 
A 12-liter tank contains helium gas pressurized to 160 
What size tank would be needed to contain this same amount of helium at atmospheric 
pressure (1 atm)? - answerP1V1=P2V2 
P1 = 160 
V1= 12 
P2= 1 
V= ? 
160(12)=(1)(?) 
=1920 
How many 3-liter balloons could the 12-L helium tank pressurized to 160 
Atm fill? 
Keep in mind that an "exhauste...
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Charles' Law Problems Exam Questions with Verified Answers
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Charles' Law Problems Exam Questions with Verified Answers 
135. 4 K - Answer-Helium gas in a 2.00 L cylinder is under 1.12 atm pressure. At 36.5°C that same gas sample has a pressure of 2.56 atm. What was the initial temperature of the gas in the cylinder? 
 
253 K - Answer-If a gas sample has a pressure of 30.7 kPa at 0.00°C, by how much does the temperature have to decrease to lower the pressure to 28.4 kPa? 
 
182 mm Hg - Answer-A gas container is initially at 47 mm Hg and 77 K (liquid n...
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MTTC integrated Sciences 094 physical sciences graded A+
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MTTC integrated Sciences 094 physical sciences graded A+ 
Plasma ionized gas that has some electrons that are described as free because they are not bound to 
an atom or molecule 
specific gravity measurement of the density of substances in a liquid compared to water 
atomic theory a theory that states that all matter is composed of tiny particles called atoms. 
John Dalton developed modern atomic theory 
negative ion anion, gains electrons 
positive ion cation; loses electrons 
ionic bo...
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CHEM133 Week 15 Lesson 7 Quiz (All Correct)
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1.	Question: A sample of oxygen gas has a volume of 3.52 L at 27°C and 800.0 torr. How many oxygen molecules does it contain? 
2.	Question: Consider a sample of gas in a container on a comfortable spring day. The Celsius temperature suddenly doubles, and you transfer the gas to a container with twice the volume of the first container. If the original pressure was 12 atm, what is a good estimate for the new pressure? 
3.	Question: Gas A and gas B are combined in a flask at initial pressures of 1...
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ALEKS PLACEMENT TEST: CHEMISTRY WITH COMPLETE SOLUTIONS 100% 2023/2024
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ALEKS PLACEMENT TEST: CHEMISTRY WITH COMPLETE SOLUTIONS 100% 2023/2024 
Matter 
Anything that has mass and takes up space; made of atoms 
 
 
Atoms 
Basic unit of matter which cannot be broken down and contain mostly empty space; contains three parts: the electron, proton, and neutron 
 
 
Elements 
A pure substance that contains only one type of atom 
 
 
Compound 
Two or more elements that are chemically bonded; includes ionic and covalent 
 
 
Mixture 
Two or more substances that are together...
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