CHEM 353 Final: 353fin03

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turquoisegnu128

9 Jan 2019

School

University of Calgary

Department

Chemistry

Course

CHEM 353

Professor

All

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Document Summary

Answer sheet and the booklet for the written answer questions. The examination consists of parts 1 - 10, each of which should be attempted. Parts provide you with a choice of questions, e. g. answer 5 out of 6. These will be graded in order the answers appear until the required number have been completed, regardless of whether they are right or wrong. Parts 1 - 7 will be computer graded, and only parts 8, 9 and 10 are to be answered in the booklet. Parts 1 - 7 consist of a series of multiple choice questions numbered 1 - 53 which are to be answered on your computer answer sheet. Indicate your answer by blackening out the appropriate space, a, b, c, d or e on the answer sheet. In some cases it is required that you indicate multiple items for a complete and/or correct answer by blackening out more than one space.

Related Questions

Sprint 7:32 PM @ 41% 1 a loncapa.nau.edu Reagent Matching Match the statement to the correct answer. (Some reagents can be used more than once.) The flowchart along with the report sheets in experiment 5 should be very helpful A OH, CO, and PO4 B Disodium EDTA (NazEDTA) C 0.1M sodium carbonate (Na2CO) D Lead chloride (PbCl2(s)) E 6M Hydrochloric Acid (HCI) F 1M ammonium hydroxide (NH40H) G Zinc Nitrate (Zn(NO3);2 H Silver Nitrate (AgNO3) I Silver chloride (AgCl(s)) J Anion K NH4 (aq) and OH(aq) L Colbalt Nitrate (Co(NO3)2) M Lead Nitrate (0.1M Pb(NO3)s) N Cation O Nar, NO, and NH4 P Aluminum Nitrate (Al(NO3)3) Q 6M Nitric Acid (HNO3ã R Barium Nitrate (Ba(NO3)2) S None of the above This reagent is added to fresh solutions in test B2 where there was no reaction in test B1. Salts containing these ions are often insoluble in water and form precipitates Mixing AgNO, and NaCI will produce what white precipitate In test A2 this reagent added to a fresh sample of solution where there was no reaction in test A1 In test B1 this is the first reagent added to the sample This reagent is added fresh samples in test A3 where there was no reaction in tests A1 or A2 Submt AnseTries 0/99 Threaded View Chronological View Sorting/Filtering options Export? s on what is marked as NEW Mark NEW posts no longer new reagent matching Mohamed Abu Khamiss (mya29:nau) Reply (Wed Oct 25 12:55:40 am 2017 (MST)) NEW it is hard for me to understand what exactly needed from me to answer you over did the multiple choice and the questions are more complicated than the choices it self i answered in many different forms never in my life i stay answering a question for 7 hours and it should be more clarified to the student. NEW Anonymous 2 Reply (Wed Oct 25 01:02:03 pm 2017 (MST)) Try your flow chart It's easier to look back into your lab manual. It's on page 69. Good Luck! Current discussion settings: 1. Display AW posts 2. Not new Once marked not NEW Change? Threaded View Chronological View Sorting/Filtering options Export? Preferences on what is marked as NEW Mark NEW posts no longer new

please help me answer some science questions:

Question 1: Choose all answers that correctly complete the following statement:

Science is...

Question 1 options:

A)	a set of careful steps followed in order by people in lab coats.

B)	just a collection of facts.

C)	a process of learning about the natural world.

D)	unchanging and static - once we know a scientific fact it does not change.

E)	a method that can answer any question.

F)	testing ideas with evidence.

Question 2 : "What is the meaning of life?" is a question that cannot be answered by science because

Question 2 options:

A)	it is not an interesting enough question for scientists.

B)	it involves collaboration with others to fully answer.

C)	it deals with supernatural explanations.

D)	it only has one answer.

Question 3 : Ignaz Semmelweis wanted to explain the high rates childbed fever mortality in his hospital in the 1800s. How did he use science?

Question 3 options:

A)	He wore a lab coat while in the maternity ward. He did not wear a lab coat in the rest of the hospital.

B)	He tested the idea that doctors caused the deaths by comparing mortality rates of patients treated by doctors that disinfected their hands (in between patients) with the mortality rates of patients that had dirty-handed doctors.

C)	He read a scientific journal about bacterial causes of childbed fever.

D)	He changed birthing procedures so that women gave birth on their sides and were assisted by doctors that disinfected their hands.

Question 4 : When determining which hypothesis or model to accept, scientists should

Question 4 options:

A)	choose the most popular explanation.

B)	choose the hypothesis supported by evidence.

C)	go with their favorite hypothesis (as long as it's still shiny).

D)	support the most recent hypothesis to be proposed as a plausible explanation.

Question 5: What happens when new evidence does not support a current scientific hypothesis (or current understanding of a natural phenomenon)?

Choose all that are correct.

Question 5 options:

A)	We should re-evaluate the current understanding and possibly reject past ideas based on the new evidence.

B)	The scientific community labels the scientist that collected the evidence as an unreliable quack.

C)	Scientists throw out the new evidence since obviously the experimental design must be flawed.

D)	Scientists should test the idea in a novel way (inspire new ideas) to determine if the new evidence is consistent with a new understanding.

Question 6: To gain entrance to the Science club, you should:

Question 6 options:

A)	fabricate your data often to support your favorite hypothesis.

B)	take all the credit for yourself.

C)	check all the boxes on the science checklist. If you miss even one, you're denied your scientist ID card.

D)	behave scientifically (preferably in a lab coat).

Question 7 : Choose all the answers that correctly complete the following statement:

Scientists interact with the scientific community by...

Question 7 options:

A)	speaking at conferences.

B)	locking themselves in ivory towers.

C)	being inspired by other scientists and testing their ideas in new and novel ways.

D)	only listening to NPR (National Public Radio) on Science Fridays.

E)	publishing in science journals.

Question 8: Which of the following questions CANNOT be answered using the scientific method?

Question 8 options:

A)	How does migration affect the reproductive success of monarch butterflies?

B)	Should local communities invest money in sustainable farming practices instead of new infrastructure (e.g., roads and bridges)?

C)	How does coastal development affect wetland biodiversity (number and types of organisms present)?

D)	Is water a toxic substance?

E)	Do pesticides cause developmental changes in frogs?

Question 9 : Choose all of the following answers that correctly completes the following statement:

Representing the scientific method in a linear, cookbook sequence:

Question 9 options:

A)	incorporates the important concept of testing ideas with evidence

B)	does not capture how science really works.

C)	is too simplified.

D)	incorrectly implies that there is an endpoint to science. (If the scientific method is a simple progression, once a valid conclusion is reached, science is done!)

CHEM 353 Final: 353fin03

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