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Chemistry Questions and Answers September 10, 2019

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Determine AG for the following reaction: CHA(g) + 202(8) - CO2(8) + 2H20(1) AGF Substance (kJ/mol) CH4(g) -50.68 O2(8) 0 CO2(8) -394.4 HO(1) -237.4 -581.1 kJ O -682.5 kJ -818.5.kJ -919.9 KJ 131.1 kJ

Determine AG for the following reaction: CHA(g) + 202(8) - CO2(8) + 2H20(1) AGF Substance (kJ/mol) CH4(g) -50.68 O2(8) 0 CO2(8) -394.4 HO(1) -237.4 -581.1 kJ O -682.5 kJ -818.5.kJ -919.9 KJ 131.1 kJ

7. Describe how to write the formula of a binary molecular compound. \f

At a pH of 9.5, would you expect p-nitrophenol to be: ionized and yellow in color un-ionized and yellow in color ionized and colorless un-ionized and colorless

6. What information do prefixes in the name of a binary molecular compound tell you about the composition of the compound

Arrange the following elements in order of decreasing metallic character. Rank from most to least metallic character. To rank items as equivalent, overlap them.View Available Hint(s) for Part C Reset Help Least metallic character Most metallic character Rb Zn Co Cr Ca S P F The correct ranking cannot be determined.

1. Write algebraic EXPRESSIONS (NOT equations! Make sure you know the difference!) for each of the following, using the notation scheme defined above and appropriate subscripts based on the question: a. All of the component B in feed 2. b. All of the component C in feed 1. c. 82% of the component A in feed 1. d. Half of the component B in product

The base component of the acetic acid buffer system is O acetate O ammonia O sodium hydroxide

Provide a self- reflection to the lesson plan attached below : Daily Lesson Plan 8 Topic: Science Objectives: P.5.5C.1- analyze and communicate the results of chemical changes that result in the formation of new materials. P.5.5C.2- analyze and communicate the results of physical changes to a substance that results in a reversible change.

Determine AG for the following reaction: CHA(g) + 202(8) - CO2(8) + 2H20(1) AGF Substance (kJ/mol) CH4(g) -50.68 O2(8) 0 CO2(8) -394.4 HO(1) -237.4 -581.1 kJ O -682.5 kJ -818.5.kJ -919.9 KJ 131.1 kJ

Answer these questions: 1. Arrange the following elements in order of decreasing metallic character. Rank from most to least metallic character. To rank items as equivalent, overlap them. Reset Help Rb Cr F P S Co Ca Zn Least metallic character Most metallic character The correct ranking cannot be determined. 2. This question reviews the format

Let's imagine we are looking at the stomach. How would a buffer with a pH of 5 act if it were placed in the stomach acid, with a pH of 2? Please check all that apply. pH Scale Question 23Answer a. The buffer would donate hydrogen ions from stomach acid, in order to raise the pH. b. The buffer would increase the reaction rate. c. The buffer would

A chemical reaction is at equilibrium. In which of the following circumstances would a change in temperature be least likely to affect the equilibrium of a chemical reaction? Select the correct answer below: When there is no change in enthalpy between the reactants and the products. When there is no change in entropy between the reactants and the

Tell me the pH of Black Tea, Hibiscus, Blue Tea, Mallow Flower and Blackberry Tea

I During a routine 2-year-old well-child visit, a nurse practitioner notes that the child has a noticeable limp, leg length discrepancy and a positive Galeazzi sign. On exam the child has decreased abduction and internal rotation of the hip. The parents report no known birth complications. What is the most appropriate diagnostic test to confirm

I During a routine 2-year-old well-child visit, a nurse practitioner notes that the child has a noticeable limp, leg length discrepancy and a positive Galeazzi sign. On exam the child has decreased abduction and internal rotation of the hip. The parents report no known birth complications. What is the most appropriate diagnostic test to confirm

How does the temperature of a material determine heat flow/transfer? Heat will always be absorbed by higher temperature materials. Heat will always flow from lower temperature materials to higher temperature materials. Heat will always flow towards materials of like or similar temperatures. Heat will always flow from higher temperature materials

In the fermentation process, microorganisms convert sugar to alcohol according to the following reaction. Given the thermodynamic data below: C6H12O6 (s) 2 C2H5OH() + 2 CO2 (g) DGo f (kJ/mol) 910.4 174.76 394.4 DHo f (kJ/mol) 1273.02 -277.7 393.5 a. Calculate the maximum amount of work that the microorganism can get out of this fermentation

Determine AG for the following reaction: CHA(g) + 202(8) - CO2(8) + 2H20(1) AGF Substance (kJ/mol) CH4(g) -50.68 O2(8) 0 CO2(8) -394.4 HO(1) -237.4 -581.1 kJ O -682.5 kJ -818.5.kJ -919.9 KJ 131.1 kJ

Phenol (C6H5OH) is a weak acid and its acid dissociation equilibrium is given below. C6H5OH C6H5O+ H (aq) Keq = 1.3 x 10-10 @ 25 o C a. What is Go of a solution of phenol at 25 o C? What does the sign of this answer tell you about what species are predominate at equilibrium? Can this reaction do work under standard conditions? Briefly explain your

22 (2 points) A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6.C. Determine the temperature at which the volume of the gas is 3.45 L. 295 K 281 K 20.6 K 554K 309 K

3. 4 marks: Give two examples of each of the following, other than any previously mentioned in the lesson: (1 marks each) 1. mixture 2. solution 3. compound 4. element

The base component of the acetic acid buffer system is O acetate O ammonia O sodium hydroxide

H 2 SO 4 + Al(OH) 3 H 2 O + Al 2 (SO 4 ) 3 Based on the above equation, calculate the concentration (in M) of a 49.1 mL solution of Al 2 (SO 4 ) 3 if 50.0 mL of 2.95 M H 2 SO 4 is required to react completely.

6. What information do prefixes in the name of a binary molecular compound tell you about the composition of the compound

7. Describe how to write the formula of a binary molecular compound. \f

Write electronic configurations and answer the following. (a) How many total s electrons are found in calcium? electrons (b) How many unpaired electrons are there in carbon? electrons (c) How many subshells are completely filled in P? subshells

explicacin sobre los requisitos de redaccin y estructura de un instrumento pblico

Provide a self- reflection to the lesson plan attached below : Daily Lesson Plan 8 Topic: Science Objectives: P.5.5C.1- analyze and communicate the results of chemical changes that result in the formation of new materials. P.5.5C.2- analyze and communicate the results of physical changes to a substance that results in a reversible change.

Read the quote. What is the meaning of intensity as it is used in this context? A sound of something B law of concentration C degree or size of something D amount of determination E extent of color saturation

Predict the hybridization of the bold central atom in the following compounds

6. What information do prefixes in the name of a binary molecular compound tell you about the composition of the compound

Predict the hybridization of the bold central atom in the following compounds

How does the temperature of a material determine heat flow/transfer? Heat will always be absorbed by higher temperature materials. Heat will always flow from lower temperature materials to higher temperature materials. Heat will always flow towards materials of like or similar temperatures. Heat will always flow from higher temperature materials

H 2 SO 4 + Al(OH) 3 H 2 O + Al 2 (SO 4 ) 3 Based on the above equation, calculate the concentration (in M) of a 49.1 mL solution of Al 2 (SO 4 ) 3 if 50.0 mL of 2.95 M H 2 SO 4 is required to react completely.

Learning Goal: This question reviews the format for writing an element's written symbol. Recall that written symbols have a particular format. Written symbols use a form like this: 3517Cl In this form the mass number, 35, is a stacked superscript. The atomic number, 17, is a stacked subscript. "Cl" is the chemical symbol for the element chlorine.

Draw the product formed when CH3CH2CH2MgBr is treated with CH2O, then H2O

What element has the electron configuration 1 s 2 2s 2 2 p 6 3 s 2 3 p 1 ? Na Be B Ga Al

is this correct? The LambertBeer Law is used to ) determine the K,, of an enzyme for a substrate using spectrophotometry measurements. (.) determine the concentration of enzyme in an enzyme assay during spectrophotometry measurements. convert absorbance value into concentration value of the light-absorbing solute using spectrophotometry

Answer these questions: 1. Arrange the following elements in order of decreasing metallic character. Rank from most to least metallic character. To rank items as equivalent, overlap them. Reset Help Rb Cr F P S Co Ca Zn Least metallic character Most metallic character The correct ranking cannot be determined. 2. This question reviews the format

I 3 Column Notes Start Assignment ments Due Sunday by 11:59pm Points 100 Submitting a file upload File Types doc, docx, pdf, and pptx Available Jul 28 at 12am - Aug 7 at 4:59am 12 Writer Assignment: 3-Column Notes Using Our Coded Text There are two parts to this assignment: Coded Text and 3-Column Notes. Be sure to go through the details of each

what standard atomic notation for polonium 84 atomic number 212 mass number 84 protons 82 electrons 128 neutrons

I 3 Column Notes Start Assignment ments Due Sunday by 11:59pm Points 100 Submitting a file upload File Types doc, docx, pdf, and pptx Available Jul 28 at 12am - Aug 7 at 4:59am 12 Writer Assignment: 3-Column Notes Using Our Coded Text There are two parts to this assignment: Coded Text and 3-Column Notes. Be sure to go through the details of each

Chlorine gas is evolved at the anode of a commercial electrolysis cell at the rate of 3.65 L/min, at a temperature of 647C. On its way to the intake pump, it is cooled to 63C. Calculate its rate of intake to the pump assuming the pressure has remained constant. a. 3.11 L/min b. 2.44 L/min c. 1.33 L/min d. 4.24 L/min

Setup two data tables(one for each trial) but leave them blank with one column labeled as"Titrant Volume(NaOH)" and the other column as "pH"

Answer these questions: 1. Arrange the following elements in order of decreasing metallic character. Rank from most to least metallic character. To rank items as equivalent, overlap them. Reset Help Rb Cr F P S Co Ca Zn Least metallic character Most metallic character The correct ranking cannot be determined. 2. This question reviews the format

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Balance the following half reaction under acidic conditions. _(a)_ e^- +_(b)_ H^+ +_(c)_ OH^- +_(d)_ H2O + _(e)_ VO^2+ --> _(f)_ e^- + _(g)_ H^+ + _(h)_ OH^- + _(i)_ H2O + _(j)_ VO2^+ INSTRUCTIONS: Balance using integer values in lowest terms. Include a number for all species, including 0 for those species that do not appear in the final equation.

Procedure Part 1:Nitrogen Oxides and Acid Deposition Put on yourgloves andsafety goggles. Print the Acid Rain Bullseye Template and write your name and date under the circular diagram. Use a permanent marker to label each of three thin-stemmed pipets as dH 2 O, KNO 2 , and NaHCO 3 . Labeled short-stem pipets. Place a clean Petri dish on the

l SafariJAM X/4 li RA Bei2x 8# 80 480 2 BRUCEBE O Zm JA ~ Q 8 71 28 8 - F411:35 . . . B V coursehero.com FO C 4 8 Apex Learn... E S S K Chat Thread World History Honors Sem 2 Apex Learning L 5.4.5 Quiz: The Islamic World in the Modern Era XA ' 6 7 Search Ask Al D The region where you would expect to find a country with the highest Question 5 of 10

Predict the hybridization of the bold central atom in the following compounds

Let's imagine we are looking at the stomach. How would a buffer with a pH of 5 act if it were placed in the stomach acid, with a pH of 2? Please check all that apply. pH Scale Question 23Answer a. The buffer would donate hydrogen ions from stomach acid, in order to raise the pH. b. The buffer would increase the reaction rate. c. The buffer would

6. What information do prefixes in the name of a binary molecular compound tell you about the composition of the compound

Chemistry 1215L-Elements of General Chemistry lab Santa Fe Community College Properties of Matter Properties of matter can be divided into two classes: physical & chemical. Changes in matter can also be classified as either physical or chemical changes. In today's lab. You will be describing the chemical and physical properties of some substances

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Draw Lewis structures for the following. Indicate geometry around the central atom.(bent, tetrahedral, etc.) You don't need to include bond angles. (show all answers on paper) A. CH3Cl B. SH2 C. SO3 D. SeBr4

H 2 SO 4 + Al(OH) 3 H 2 O + Al 2 (SO 4 ) 3 Based on the above equation, calculate the concentration (in M) of a 49.1 mL solution of Al 2 (SO 4 ) 3 if 50.0 mL of 2.95 M H 2 SO 4 is required to react completely.

how do the cations and anions would swap in a double displacement reaction between AgNO 3 and BaCl 2 . an (s) next to any solid that forms as a precipitate.

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When some O2 is added will the pressure of SO2 and SO3 increase or decrease

When some SO3 is removed. Will the pressure of SO2 and O2 increase or decrease

7. Describe how to write the formula of a binary molecular compound. \f

7. Describe how to write the formula of a binary molecular compound. \f

A solution is made by dissolving 125g (molar mass= 342) sucrose in 1.50 kg of water. What is the molality

1. Write algebraic EXPRESSIONS (NOT equations! Make sure you know the difference!) for each of the following, using the notation scheme defined above and appropriate subscripts based on the question: a. All of the component B in feed 2. b. All of the component C in feed 1. c. 82% of the component A in feed 1. d. Half of the component B in product

The TDG Regulations divides dangerous goods into nine Primary Classes that identify the type of hazard they represent. Select the best option. True False

34 : The term "reactivity" tells you: the safest way to put out a fire what happens when a chemical comes in contact with air, water or other chemicals how the chemical might enter your body how a chemical looks or smells

H 2 SO 4 + Al(OH) 3 H 2 O + Al 2 (SO 4 ) 3 Based on the above equation, calculate the concentration (in M) of a 49.1 mL solution of Al 2 (SO 4 ) 3 if 50.0 mL of 2.95 M H 2 SO 4 is required to react completely.

Balance the following half reaction under acidic conditions. _(a)_ e^- +_(b)_ H^+ +_(c)_ OH^- +_(d)_ H2O + _(e)_ VO^2+ --> _(f)_ e^- + _(g)_ H^+ + _(h)_ OH^- + _(i)_ H2O + _(j)_ VO2^+ INSTRUCTIONS: Balance using integer values in lowest terms. Include a number for all species, including 0 for those species that do not appear in the final equation.

Provide a self- reflection to the lesson plan attached below : Daily Lesson Plan 8 Topic: Science Objectives: P.5.5C.1- analyze and communicate the results of chemical changes that result in the formation of new materials. P.5.5C.2- analyze and communicate the results of physical changes to a substance that results in a reversible change.

Determine AG for the following reaction: CHA(g) + 202(8) - CO2(8) + 2H20(1) AGF Substance (kJ/mol) CH4(g) -50.68 O2(8) 0 CO2(8) -394.4 HO(1) -237.4 -581.1 kJ O -682.5 kJ -818.5.kJ -919.9 KJ 131.1 kJ

is this correct? The LambertBeer Law is used to ) determine the K,, of an enzyme for a substrate using spectrophotometry measurements. (.) determine the concentration of enzyme in an enzyme assay during spectrophotometry measurements. convert absorbance value into concentration value of the light-absorbing solute using spectrophotometry

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l SafariJAM X/4 li RA Bei2x 8# 80 480 2 BRUCEBE O Zm JA ~ Q 8 71 28 8 - F411:35 . . . B V coursehero.com FO C 4 8 Apex Learn... E S S K Chat Thread World History Honors Sem 2 Apex Learning L 5.4.5 Quiz: The Islamic World in the Modern Era XA ' 6 7 Search Ask Al D The region where you would expect to find a country with the highest Question 5 of 10

what standard atomic notation for polonium 84 atomic number 212 mass number 84 protons 82 electrons 128 neutrons

Procedure Part 1:Nitrogen Oxides and Acid Deposition Put on yourgloves andsafety goggles. Print the Acid Rain Bullseye Template and write your name and date under the circular diagram. Use a permanent marker to label each of three thin-stemmed pipets as dH 2 O, KNO 2 , and NaHCO 3 . Labeled short-stem pipets. Place a clean Petri dish on the

Astudent obtained a density versus percent by mass sodium chloride standard curve for the Salt in the Chesapeake Bay experiment with the best-fit line below. y=0.00569x+ 1.046. : 'Note: Copying and/or posting this or other questions without the express written permission from Dr. Burke and __ aviolation of intellectual property copyright law. Sea

22 (2 points) A gas sample is held at constant pressure. The gas occupies 3.62 L of volume when the temperature is 21.6.C. Determine the temperature at which the volume of the gas is 3.45 L. 295 K 281 K 20.6 K 554K 309 K

Draw the product formed when CH3CH2CH2MgBr is treated with CH2O, then H2O

Answer these questions: 1. Arrange the following elements in order of decreasing metallic character. Rank from most to least metallic character. To rank items as equivalent, overlap them. Reset Help Rb Cr F P S Co Ca Zn Least metallic character Most metallic character The correct ranking cannot be determined. 2. This question reviews the format

H 2 SO 4 + Al(OH) 3 H 2 O + Al 2 (SO 4 ) 3 Based on the above equation, calculate the concentration (in M) of a 49.1 mL solution of Al 2 (SO 4 ) 3 if 50.0 mL of 2.95 M H 2 SO 4 is required to react completely.

Balance the following half reaction under acidic conditions. _(a)_ e^- +_(b)_ H^+ +_(c)_ OH^- +_(d)_ H2O + _(e)_ VO^2+ --> _(f)_ e^- + _(g)_ H^+ + _(h)_ OH^- + _(i)_ H2O + _(j)_ VO2^+ INSTRUCTIONS: Balance using integer values in lowest terms. Include a number for all species, including 0 for those species that do not appear in the final equation.

Module 1 Unit 1 Assignment B Answer the questions. Provide references at the end of the assignment. 1. What are the two things that characterize matter? (1 mark) The quantity of matter that makes up an object is called its mass, and it is commonly expressed in grams or kilograms. The volume of matter that an object contains is expressed in litres

I 3 Column Notes Start Assignment ments Due Sunday by 11:59pm Points 100 Submitting a file upload File Types doc, docx, pdf, and pptx Available Jul 28 at 12am - Aug 7 at 4:59am 12 Writer Assignment: 3-Column Notes Using Our Coded Text There are two parts to this assignment: Coded Text and 3-Column Notes. Be sure to go through the details of each

Tell me the pH of Black Tea, Hibiscus, Blue Tea, Mallow Flower and Blackberry Tea

3. 4 marks: Give two examples of each of the following, other than any previously mentioned in the lesson: (1 marks each) 1. mixture 2. solution 3. compound 4. element

Using the Scherrer equation compare the (110) line breadth for powder Chromium samples with average grain size of 50nm, and 10 m irradiated with Cu K source. What practical considerations do your result convey

Which of following mixtures can be used to make a buffer solution. NaH2PO4 and Na2HPO4, NH3 and H2O, Na2CO3 and H2CO3, or NaHSO4 and H2SO4

At a pH of 9.5, would you expect p-nitrophenol to be: ionized and yellow in color un-ionized and yellow in color ionized and colorless un-ionized and colorless

l SafariJAM X44 1 RX 5212x 82 80 48) @6 ROUTERS O Zm JO A ~ Q 8 7830B A= 1412:25 course.apexlearning.com O . . En V coursehero.com Dashboard | ALVS - Part Time Consumer Apex Learning Apex Learning - Courses G A S S K Chat Thread E Mathematics II Sem 2 3 Apex Learning Search Q Ask Al D 1.4.2 Quiz: Introduction to Proofs XA . The process of proving

Which of following mixtures can be used to make a buffer solution. NaH2PO4 and Na2HPO4, NH3 and H2O, Na2CO3 and H2CO3, or NaHSO4 and H2SO4

Astudent obtained a density versus percent by mass sodium chloride standard curve for the Salt in the Chesapeake Bay experiment with the best-fit line below. y=0.00569x+ 1.046. : 'Note: Copying and/or posting this or other questions without the express written permission from Dr. Burke and __ aviolation of intellectual property copyright law. Sea

A solution is made by dissolving 125g of sucrose (molar mass = 342g/mol) in enough water to make 750mL of solution. What is the molarity

l SafariJAM X/4 li Rx Beix #8 80 48) ORDEUCEBEE O m FAD ~ Q 8 79298 A= FF9:43 . . . B V coursehero.com FO C 25 Fall Application Dashboard | ALVS -... Apex Learning - Cou.. https://media.apexle... Apex Learning M Mr. Gee out of the of... G D S S K Chat Thread Chemistry Honors Sem 2 Apex Learning Search Q Ask Al D A 1 1.1.2 Quiz: Kinetic Theory XA 2

Draw Lewis structures for the following. Indicate geometry around the central atom.(bent, tetrahedral, etc.) You don't need to include bond angles. (show all answers on paper) A. CH3Cl B. SH2 C. SO3 D. SeBr4

Write electronic configurations and answer the following. (a) How many total s electrons are found in calcium? electrons (b) How many unpaired electrons are there in carbon? electrons (c) How many subshells are completely filled in P? subshells

What element has the electron configuration 1 s 2 2s 2 2 p 6 3 s 2 3 p 1 ? Na Be B Ga Al

A common type of handwarmer contains iron powder that reacts with oxygen to form an oxide of iron. As soon as the handwarmer is exposed to air, the reaction begins and heat is emitted. Is the reaction between the iron and oxygen exothermic or endothermic? Draw an energy diagram showing the relative energies of the re actants and products in the

Draw Lewis structures for the following. Indicate geometry around the central atom.(bent, tetrahedral, etc.) You don't need to include bond angles. (show all answers on paper) A. CH3Cl B. SH2 C. SO3 D. SeBr4

Predict the organic product formed when benzoyl chloride reacts with N-methylcyclohexylamine

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