Qualitative analysis Questions and Answers

15 Consider the reaction 10 pts MnO 4HCI MnCl Cl 2H 0 When 74 8 g of MnO reacts with excess HCI 28 05 g of water was actually produced Calculate the percent yield for this reaction MnO2 74 89 86 92 gimd H O 28 059 0 861 E R m n mm m 3 4 36 5 glme 124 1 18 015 gind 0 861 4 3 4 mol of Hel 1 56 L R Percentyrld actual 10010 Theortical yield

alyze the word pro0 5 00 grams of solid citric acid is dissolved in 500 00 ml of water to make aqueous citric acid options options 500 00 ml of water 5 00 grams of solid citric acid Question 19 aqueous citric acid options 500 00 ml of water Salt water Table salt NaCl Question 18 A chemical reaction can be reversed if visible salt in the mixture that did not dissolve 1 Question 17 Analyze the word problem and match the vocabulary terms to the chemicals in the word problem Table salt NaCl is dissolved in 500 00 ml of water the salt water was mixed but there is still visible salt in the mixture that did not dissolve What does heat do to reaction and dissolution rate 2 3 4 1 2 3 Solute 4 Solvent Solution Saturated Solution Solute word Solvent options The energy of the reactants exceeds the activation energy threshold The energy of the products exceeds the activation energy threshold The energy of the reactants is less than the activation energy threshold The energy of the products is less than the activation energy threshold Precioate Saturated Solution

What are greenhouse gases List 5 different green house gases and list the percentages in the atmosphere i Compare the amount of greenhouse gases to non greenhouse gases b Explain how greenhouse gases different from non greenhouse gases C i Why is O not considered a greenhouse gas and CO is considered a greenhouse gas Explanation with graphs about what is happening to the amount of greenhouse gases in the atmos 11 Have they been increasing Decreasing

8 Consider the generic equation for the reaction of the halogens X and Y X2 g 2Y aq 2X aq Y2 8 Is X or Y the more reactive halogen Explain in et

Margarine is a healthier alternative to butter Whereas butter is made from saturated animal fat margarine is made from polyunsaturated vegetable oils Despite being made from vegetable oil margarine is a solid that looks and tastes like butter Select the answer that best explains how this is possible The vegetable oil is heated in the presence of an iron catalyst which leads to halogenation of the alkene functional groups The vegetable oil is processed using hydrogenation which adds hydrogen atoms to the unsaturated hydrocarbon chain Hydrogen bromide is used to hydrohalogenate the double bonds in the hydrocarbon chain of the vegetable oil An enantiomer is used to change the chemical and physical properties of the vegetable oil

Explicit Details What does Aven make a list of on her blog TYPE HERE 2 Characterization Who is Aven writing the blog post for TYPE HERE 3 Chapter Structure Throughout the course of the novel the author brings up tarantulas as a recurring topic Why do you think this is TYPE HERE 4 Inference Do you think the guitar is a clue for the kids Why or why not TYPE HERE

Calculate AE for each of the following a HIS question has multiple parts Work all the parts to get the most po b q 12 kJ w 91 kJ AE 79 kJ q 45 kJ w 22 kJ AE 1 kJ Num LIJ

The aluminum in a package containing 70 ft of kitchen foil weighs approximately 11 ounces Aluminum has a density of 2 70 g cm What is the approximate thickness of the aluminum foil in millimeters 1 ounce 28 4 g 1 ft 12 in 1 in 2 54 cm Thickness mm

1 Explicit Details What does Aven say she ll do the next time she goes past the kid outside TYPE HERE 2 Explicit Details Why is Zion eating outside TYPE HERE 3 Characterization Aven s mom defends Aven when other kids have treated her poorly How does Aven s mom defend her TYPE HERE 4 Inference Why do you think Aven starts a conversation with Zion TYPE HERE

Explicit Details Why does Connor not eat in front of others TYPE HERE 2 Summary Summarize Aven s adoption story TYPE HERE 3 Chapter Structure Throughout the book so far we ve heard Dad call Aven Sheebs as a nickname Where did this nickname come from TYPE HERE Quoting Explicit Details Using a quote from this chapter explain what Mom told Aven she could do of the same time she was teaching her how to live TV

1 Sequencing How does the tarantula hawk hatch its eggs TYPE HERE 2 Characterization Does Aven like soccer as much as she used to Why or why not TYPE HERE 3 Explicit Details Why does Aven like to hike up the hill TYPE HERE 4 Inference What do you think the turquoise necklace might have to do with the Cavanaugh mystery TYPE HERE

Which is a buffer zone between the outside world and most of the cells of the body All of the answers are correct cell membrane O extracellular fluid red blood cells intracellular fluid

The study of body function in a disease state is O microbiology O histology O pathophysiology O necrology O physiology

How many moles of sodium hydroxide would have to be added to 125 mL of a 0 436 M acetic acid solution in order to prepare a buffer with a pH of 4 490 moles

MISSED THIS Watch IWE 4 13 Read Section 4 10 You can Click on the Review link to access the section in your eText Determine the number of moles of hydrogen atoms in each of the following samples Part B number of moles of C4H10 and the number of moles of H atoms nH 1 6 mol CH4 Express your answer in moles to two significant figures moles of hydrogen atoms VA O 0 0910 mol H10 X mol 10 mo 1 mol C

For the molecular compound sulfur dioxide what would you multiply grams of SO by to get the units molecules of SO g SO x T 1 gram SO molecules SO2 Drag and drop your selection from the following list to complete the answer 64 07 grams SO2 6 02 1023 molecules SO 2 64 07 mol SO 64 07 molecule SO 1 molecule SO 6 02 x 1023 mol SO 1 mol SO 6 02 1023 grams SO

Draw the Lewis structure of SCO

O can cause an improvement in leukemia Onone of these responses is correct is highly unlikely since folic acid is found in almost all foods causes osteoporosis is a problem faced by vegans causes a craving for foliage Question 29 1 point Invertase is one of a family of molecules that breaks up lactose into glucose and galactose is a highly complex protein which is sold as a food in South America None of these options is correct converts sucrose into glucose and fructose causes saliva to form thus aiding digestion

the following is true with respect to zinc None of these statements is correct It is a necessary component in only 4 5 enzymes and hormones It is considered toxic in milligram doses but not microgram doses It is a necessary component of over 300 enzymes and hormones It is present in the body at about the 20 grams level The RDA is about 20 micrograms per day Question 21 1 point The process of an egg white becoming opaque on cooking is called None of these options is correct water boiling protein folding denaturation protein decomposition fat protein interactions

goiter pellagra beriberi scurvy None of these options is correct night blindness Question 17 1 point Which of the following food components are thought to play a significant role in the creation of cataracts monounsaturated fats sucrose saturated fats certain vitamins trans fats None of these options is correct

A student started with 1 525 grams of copper II oxide and produced 3 500 g of copper II sulfate What is the percent yield The product is a hydrate Use appropriate significant figures Do not put a percent sign in the answer box Please ignore extra zeros that will be automatically added to your answer by the system Useful information chemical equation CuO s H SO4 aq CuSO4 aq H O l Formula weight of hydrated copper II sulfate 249 677 g mol Formula weight of copper II oxide 79 545 g mol

When added to water which of the following would conduct electricity to clearly illuminate a light bulb when electrodes are immersed sugar OV 8 drink none of these options is correct zinc metal most fatty acids galactose Question 25 1 point Which one of the following supplements has the greatest scientific support OB Vitamins to prevent heart disease Vitamin C to reduce the risk of heart disease Multivitamin supplements to reduce the risk of cancer Vitamin E to reduce the risk of heart disease Folic acid to reduce the risk of birth defects

is based only on calorie content of different foods recommends at least one glass of milk a day does not distinguish between whole grain and refined carbohydrates makes no recommendation about relative proportions of fruits and vegetables carbohydrates and proteins recommends meat as the main protein source none of these responses is correct Question 67 1 point From the list of food below select the one that the amylase enzyme is most important for in the digestive process Red meat Fish Flax Grass None of these options is correct

Question 78 1 point Resveratrol is the compound touted as the healthy ingredient in pomegranate juice is a B vitamin found in the skin of grapes is a compound found in red wine is a preservative that has been attacked by the Food Babe None of these options is correct is only available in synthetic supplements

Concerning the names on scientific publications pick the correct statement An asterisk is always associated with the person who wrote the article The senior head of project author is always listed first There can be any number of names on publications and in any order The names vary as per the discipline but are almost always in alphabetical order None of these statements is correct The author who supported the research is usually listed first but there is a limit to the number of authors

Ethanol for Transport Part 2 0 0 5 0 puntos calificado Ethanol has an energy density of 021 GJ L How many liters of ethanol are required to supply US transportation demand Liters

Which of the following pairs are considered to deliver all the required amino acids complete proteins rice and corn rice and beans none on this list potatoes and rice wheat and rice Question 33 1 point Which one of the following concerning meatless burgers is correct The calorie count is always higher than in beef burgers The total fat content is always higher than in beef burgers None of these statements is true The sodium level is higher than in beef burgers The basic component of meatless burgers is always soy There is essentially no nutritional difference between meatless and beef burgers

Given the molar enthalpy of combustion of ethanol C H5OH is 1368 54 kJ mol how much heat in kilojoules will be released by the combustion of 25 6 g at standard pressure O 1 87 10 2 kJ O 53 45 kJ O 2 46x10 kJ

Explicit Details Where does this chapter take place TYPE HERE 2 Explicit Details Why does Aven decide to ride the bus home TYPE HERE 3 Inference Why do you think Connor doesn t eat very much Why do think he wants to go home before dinner TYPE HERE 4 Inference Why do you think Aven is so interested in the Cavanaugh mystery TYPE HERE

4 the 4 underlined weak words in the space below Unfortunately my school has a few students who are very mean to others My friends and I hate when they bully others so we are planning to report them to the principal s office They are not nice so there should be consequences for their actions WEAK WORD 1 Very Type here WEAK WORD 2 Mean Type here WEAK WORD 3 Hate Type here

A Br nsted Lowry acid is defined as a proton acceptor an electron pair acceptor a hydroxide ion acceptor O a proton donor

Determine the mass of potassium in 25 5 g of KBr

and 1 Figurative Language What does the narrator mean when she says we had gone out there early one morning before the sun could cook us TYPE HERE 2 Inference Why does Aven like to play soccer compared to other sports TYPE HERE 3 Setting Compare and contrast the settings of Kansas and Arizona What does the narrator tell you about both places that relate to how they make her feel TYPE HERE 4 Make a Connection If you could write your own blog what would you write about Why TYPE HERE

2 Name the following salts according to the old ic ous system and the Stock system a CrS b Cr O3 c Crl 6H O d CuCl e Cul f CuBr 4H O g HgCl h Hg Cl i HgO j Fe O3 k FeS 1 Fel 6H O m Coo n CoBr 6H O o SnF p SnO 2 q Cu O r Fe OH

How many molecules of N O4 are in 42 06 g N2O4 The molar mass of N O4 is 92 02 g mol O 2 59 1024 N2O4 molecules O2 75 x 1023 N 04 molecules O 5 54 x 1025 N O4 molecules 4 57 x 1022 N 04 molecules n 791 x 1022 No molecules

There have been multiple instances of kids not being kind to the main characters Usually Aven Connor and Zion ignore the kids who say mean things How would you respond in this situation even if you weren t the one being called the names TYPE HERE

At the end of Chapter 7 Aven says that the girls didn t meet her They only met her missing arms What does Aven mean by this Has someone ever met you in a similar way to Aven What do you wish people knew more about you TYPE HERE

MISSED THIS Watch KCV 2 2 IWE 2 2 Read Section 2 2 You can click on the Review link to access the section in your eText Calculate the energy of a photon of electromagnetic radiation at each of the following wavelengths Part C 0 0520 nm a wavelength used in medical X rays Express your answer using three significant figures E3 VAE xa Xb a x x x X 10n You have already submitted this answer Enter a new answer No credit lost Try again J

How many mg are in 6 2 kg Use two significant figures in your answer Paragraph V BIU A E E v

Another word for agony is A fear B anger Ogreed suffering 2 To avoid something is to A hide it B break it Oforget about it D stay away from it 3 A consequence is a A result B chance Othought warning 4 If a person is dependent it means the person works hard every day B decides to leave home needs help most of the time causes trouble in the neighborhood 5 To enable means to make A possible Benjoyable responsible O comfortable 6 A relationship between two people is a A reply B trade promise connection To rescue means to A rest B save reach Osearch 8 A responsibility is a A test rule O plan O duty

Km of 7 00mm and Vmax 3 7 mM s calculate velocity Vo for each substrate Concentration s 2 5 mM 7 00m M 12 5mm

eing the decision to publish a paper O None of these statements is correct The referee s repeat the procedures outlined by the researcher to test the validity of the paper The referee s and the researcher are not in direct contact The reviews are randomly assigned to two groups that receive different parts of the paper The paper is made available to the public so that the entire community may review it prior to publication The researcher decides who will review their paper Question 65 1 point Which one of the following best describes a polyunsaturated fat It is a compound in which the carbon atoms have their full complement of hydrogen atoms compound in which some carbon atoms have not their full complement of hydrogen atoms disaccharide of glucose and galactose polymer of twenty different amino acids None of these statements is correct compound which contains long chains of glucose units

Identify the conjugate base of phosphoric acid H3PO4 HPO4 H PO4 HPO3 3 PO4 HI DO

none of the responses is correct Oplays no role in immune function has no known level at which it becomes toxic is only found in foods of animal origin cannot be supplied in adequate amounts in the diet without supplements Olevels in the blood cannot be accurately determined Question 55 1 point The process by which an oil can be converted to margarine is called hydration None of these statements is correct dehydration hydrogenation sublimation

The pH of coffee is approximately 5 0 How many times greater is the H3O in coffee than in tap water with a pH of 8 0 Select one a 0 62 O b 30 O c 1 6 O d 1000 J

Fill in the following table regarding the following reaction UO s 4 HF aq UF s 2 H O l molecular ratio mole ratio mass ratio general moles general mass 22 X 20 0 200 18 0

Throughout the past few chapters Aven keeps bringing up the mystery surrounding the Cavanaugh family Why do you think she s so enamored with this storymystery Why does the author bring this mystery up in multiple chapters TYPE HERE

Which one of these dietary supplements has been shown to increase the risk of lung cancer in smokers Resveratrol Beta carotene Niacin Vitamin D Calcium O None of these options is correct Question 23 1 point The unique chemical properties of enzymes allow them to assist with many bodily functions Where does the body get these vital components of life All enzymes are supplied at birth by the mother O Vitamins serve as the building blocks for enzymes in the body Enzymes are produced in the body from amino acids Enzymes comes from meat products in the diet Enzymes are supplied by all foods in the diet

You create a process to be used in conjunction with combustion analysis using chlorine gas to determine the amount of selenium in certain organic compounds If there is selenium in the molecule SeCl 149 87 g mol is produced Analysis of 28 20 g of an unknown compound produces 36 21 g CO2 18 53 g H O and 30 83 g SeCl2 The molar mass of the compound is about 137 g mol What is its molecular formula C4H10Se C8H Se C9H18Se C3H12Se C H8Se

Which statement is correct with respect to eggs The white of an egg has about equal quantities of fat and protein None of these statements is correct The white of an egg is about 90 water On cooking the yolk and white solidify within a degree celsius of each other The yolk of the egg is about 20 water and mostly protein