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Chemistry Questions and Answers September 10, 2019

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A pill that is 91.5% aspirin is found to contain 59.27 mg of aspirin. What is the mass of the pill in milligrams?

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

If an additional material was added to Table 4.4 in the book and it had a bank dry unit weight of 2,900 lb/cy and a loose dry unit weight of 2,500 lb/cy, what would be its Percent Swell? Group of answer choices 13.79% 86.21% 84.00% 16.00%

The following below on rate laws: Actual Rate Law from a Table of Concentration/Rate Data 28. Given the following data, determine the rate law for the reaction NH4 (aq) + NO2 (aq) - N2(g) + 2H200 Experiment [NH4 ] (M) [NO2 1 (M) 0.2500 Rate (MIs) 0.2500 W N 0.5000 1.25 x 10-3 0.2500 0.2500 2.50 x 10-3 0.1250 6.25 x 104 a. k[NH4 ][NO2 ] k[ NH4

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

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

a)[12 pts]A 35.6 g sample of ethanol (CHOH) is burned in a bomb calorimeter that has a heat25capacity of 23.3 kJ/.CHOH (l) + 3 O(g)2 CO(g)3 HO (l)25222If the temperature of the calorimeter rose from 35.0to 76.0, determine the value of the?in units of kJ per mol of reaction

A catalyst has no effect on: (select all that apply) Select all that apply: value of an equilibrium constant rate of the forward reaction equilibrium concentrations rate of the reverse reaction

3. Given supplies of glycolic acid (chemical structure at right), EDTA (ethylenediaminetetraacetic acid), shown below left, and a new chemical EDDADA (ethylenediamine diol diacetic acid), shown below right: H O -O C - OH HO -C C- OH HO-CH2 C -OH HO CH, CH 2 H CH, CH 2 N- C H , N- C C CH2 CH2 H 2 H2 CH, CH2 HO OH HO H,C-OH A. Which one of these

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

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

Choose the answer that appropriately labels each of the following transformations as energetically favorable or unfavorable. O Lo _ Baie, 7 N | NaOH excess O Hoo O HON Favorable: 1 and 2. Unfavorable: 3 and 4. Favorable: 1 and 4. Unfavorable: 2 and 3. Favorable: 2, 3, and 4. Unfavorable: 1. Favorable: 1, 2, and 4. Unfavorable: 3

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.

l SafariJAM X/4 li RX Beix #8 80 48) "ORDEUCEBEE O m FAD ~ Q 8 79298 A= FF9:41 . . . B V coursehero.com 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 6 7

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.

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

3. Given supplies of glycolic acid (chemical structure at right), EDTA (ethylenediaminetetraacetic acid), shown below left, and a new chemical EDDADA (ethylenediamine diol diacetic acid), shown below right: H O -O C - OH HO -C C- OH HO-CH2 C -OH HO CH, CH 2 H CH, CH 2 N- C H , N- C C CH2 CH2 H 2 H2 CH, CH2 HO OH HO H,C-OH A. Which one of these

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

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

a)[12 pts]A 35.6 g sample of ethanol (CHOH) is burned in a bomb calorimeter that has a heat25capacity of 23.3 kJ/.CHOH (l) + 3 O(g)2 CO(g)3 HO (l)25222If the temperature of the calorimeter rose from 35.0to 76.0, determine the value of the?in units of kJ per mol of reaction

3. Given supplies of glycolic acid (chemical structure at right), EDTA (ethylenediaminetetraacetic acid), shown below left, and a new chemical EDDADA (ethylenediamine diol diacetic acid), shown below right: H O -O C - OH HO -C C- OH HO-CH2 C -OH HO CH, CH 2 H CH, CH 2 N- C H , N- C C CH2 CH2 H 2 H2 CH, CH2 HO OH HO H,C-OH A. Which one of these

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

Use the periodic table to describe which elements form ionic bonds and which elements form covalent bonds. Describe at least ten ionic bonds and ten covalent bonds.

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

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

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

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

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

Select all that apply Which of the following steps correctly show how to calculate the solubility for Pb(IO3)2 given that Ksp = 2.6 10-13? Select all that apply. Multiple select question. S = 2.6101334 S = 2.610133 Assume that [Pb2+] = S, then [IO3-] = 2S. Ksp = 4S3

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

The following below on rate laws: Actual Rate Law from a Table of Concentration/Rate Data 28. Given the following data, determine the rate law for the reaction NH4 (aq) + NO2 (aq) - N2(g) + 2H200 Experiment [NH4 ] (M) [NO2 1 (M) 0.2500 Rate (MIs) 0.2500 W N 0.5000 1.25 x 10-3 0.2500 0.2500 2.50 x 10-3 0.1250 6.25 x 104 a. k[NH4 ][NO2 ] k[ NH4

Before any reaction occurs, the concentrations of A and B in the reaction below are each 0.03900 M . What is the equilibrium constant if the concentration of A at equilibrium is 0.01365 M ? 2 A ( a q ) + B ( a q ) 2 C ( a q ) Round your answer to one decimal place

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.

Consider the following statements pertaining to vibrational spectroscopy. Determine whether each statement is true or false. Homonuclear diatomic molecules are Raman active and infrared inactive. Sample cells and windows in an infrared spectrometer are commonly made from salts like KBr and NaCl because these materials are largely transparent to

14 (2 points) A crystalline solid of unknown origin forms an aqueous solution that conducts an electrical current. The solid has a high melting point and shatters when struck with a hammer. The solid is likely to be: C a molecular solid. a covalent network solid. O a metallic solid. an ionic solid

The following below on rate laws: Actual Rate Law from a Table of Concentration/Rate Data 28. Given the following data, determine the rate law for the reaction NH4 (aq) + NO2 (aq) - N2(g) + 2H200 Experiment [NH4 ] (M) [NO2 1 (M) 0.2500 Rate (MIs) 0.2500 W N 0.5000 1.25 x 10-3 0.2500 0.2500 2.50 x 10-3 0.1250 6.25 x 104 a. k[NH4 ][NO2 ] k[ NH4

1. (1)When first produced, laundry bleach has no odor and is at its highest potency level. (2), on the shelf for a length of time (five to eight days) causes the solution to begin to break down chemically. (3) As it breaks down, the chlorine in the mixture gives off a gas, which is the reason certain bleaches exhibit a strong smell.Click on the

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

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.

If an additional material was added to Table 4.4 in the book and it had a bank dry unit weight of 2,900 lb/cy and a loose dry unit weight of 2,500 lb/cy, what would be its Percent Swell? Group of answer choices 13.79% 86.21% 84.00% 16.00%

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

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"

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

3. Given supplies of glycolic acid (chemical structure at right), EDTA (ethylenediaminetetraacetic acid), shown below left, and a new chemical EDDADA (ethylenediamine diol diacetic acid), shown below right: H O -O C - OH HO -C C- OH HO-CH2 C -OH HO CH, CH 2 H CH, CH 2 N- C H , N- C C CH2 CH2 H 2 H2 CH, CH2 HO OH HO H,C-OH A. Which one of these

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

Below are 2 vapor pressure curves. One is for pure water and the other for an aqueous solution of a metal hydroxide, MOH, a strong base. The MOH(aq) solution was prepared by dissolving 30.96 g of MOH in 100. g of water. What is the molar mass of MOH, to 2 significant figures? Below are 2 vapor pressure curves. One is for pure water and the other

Classify the following elements as halogens, alkali metals, alkaline earth metals, or noble gases. Drag the appropriate elements to their respective bins. View Available Hint(s) for Part A ResetHelp I Ne Mg Br Rb Fr Halogens droppable Alkali metals droppable Alkaline earth metals droppable Noble gases droppable

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.

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

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

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

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.

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

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.

why is this wrong? V Your answer is incorrect. . (a): Your answer is incorrect. . (b): Your answer is incorrect. Rewrite each equation as requested. (a) Rewrite as a logarithmic equation. 43 = 64 (b) Rewrite as an exponential equation. 1096 6 = -1 (a) log 81 = X (b) 6 = - 1

If an additional material was added to Table 4.4 in the book and it had a bank dry unit weight of 2,900 lb/cy and a loose dry unit weight of 2,500 lb/cy, what would be its Percent Swell? Group of answer choices 13.79% 86.21% 84.00% 16.00%

If an additional material was added to Table 4.4 in the book and it had a bank dry unit weight of 2,900 lb/cy and a loose dry unit weight of 2,500 lb/cy, what would be its Percent Swell? Group of answer choices 13.79% 86.21% 84.00% 16.00%

Identify two common laser devices sit in the IR radiation spectrum

which energy level or levels can contain a p sublevel? n=2 or greater, n=1 only, n=1 and n=2, n=1 or greater

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

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

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

Identify two common laser devices sit in the IR radiation spectrum

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

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

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

Classify the following elements as halogens, alkali metals, alkaline earth metals, or noble gases. Drag the appropriate elements to their respective bins. View Available Hint(s) for Part A ResetHelp I Ne Mg Br Rb Fr Halogens droppable Alkali metals droppable Alkaline earth metals droppable Noble gases droppable

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

Choose the answer that appropriately labels each of the following transformations as energetically favorable or unfavorable. O Lo _ Baie, 7 N | NaOH excess O Hoo O HON Favorable: 1 and 2. Unfavorable: 3 and 4. Favorable: 1 and 4. Unfavorable: 2 and 3. Favorable: 2, 3, and 4. Unfavorable: 1. Favorable: 1, 2, and 4. Unfavorable: 3

a)[12 pts]A 35.6 g sample of ethanol (CHOH) is burned in a bomb calorimeter that has a heat25capacity of 23.3 kJ/.CHOH (l) + 3 O(g)2 CO(g)3 HO (l)25222If the temperature of the calorimeter rose from 35.0to 76.0, determine the value of the?in units of kJ per mol of reaction

The following below on rate laws: Actual Rate Law from a Table of Concentration/Rate Data 28. Given the following data, determine the rate law for the reaction NH4 (aq) + NO2 (aq) - N2(g) + 2H200 Experiment [NH4 ] (M) [NO2 1 (M) 0.2500 Rate (MIs) 0.2500 W N 0.5000 1.25 x 10-3 0.2500 0.2500 2.50 x 10-3 0.1250 6.25 x 104 a. k[NH4 ][NO2 ] k[ NH4

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.

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

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

Select all that apply Which of the following steps correctly show how to calculate the solubility for Pb(IO3)2 given that Ksp = 2.6 10-13? Select all that apply. Multiple select question. S = 2.6101334 S = 2.610133 Assume that [Pb2+] = S, then [IO3-] = 2S. Ksp = 4S3

1. (1)When first produced, laundry bleach has no odor and is at its highest potency level. (2), on the shelf for a length of time (five to eight days) causes the solution to begin to break down chemically. (3) As it breaks down, the chlorine in the mixture gives off a gas, which is the reason certain bleaches exhibit a strong smell.Click on the

A catalyst has no effect on: (select all that apply) Select all that apply: value of an equilibrium constant rate of the forward reaction equilibrium concentrations rate of the reverse reaction

Find H for the following reaction Find AH for the following reaction. Please round and report your answer as a whole number. Please round and report your answer as a whole number. Make sure to use a - if negative answer. Hg2Cl2 (5) - 2Hg (1) + Clz (g) AH=? Given: Hg (1) + Clz (g) - HgCl2 (s) AH = -249 KJ Hg (1) + HgClz (s) - HgzClz (s) AH =-46KJ

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

Before any reaction occurs, the concentrations of A and B in the reaction below are each 0.03900 M . What is the equilibrium constant if the concentration of A at equilibrium is 0.01365 M ? 2 A ( a q ) + B ( a q ) 2 C ( a q ) Round your answer to one decimal place

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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.

What pH is needed to produce this value of Q if the concentration and pressure values are [Br2]=2.50104M , [Br]=11.20M , [SO42]=8.10M , and PSO2=2.50105bar ? Sulfuric acid is a very strong acid that can act as an oxidizing agent at high concentrations (very low pil, or even negative pil values). Under standard conditions, sulfuric acid has a low

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

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

Compare and contrast chemical bonds. When two atoms interact and one atom has an electronegativity that extremely larger than the other they will form a(n): a. ionic bond. b. non polar covalent bond. c. polar covalent bond. d. hydrogen bond

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

1. (1)When first produced, laundry bleach has no odor and is at its highest potency level. (2), on the shelf for a length of time (five to eight days) causes the solution to begin to break down chemically. (3) As it breaks down, the chlorine in the mixture gives off a gas, which is the reason certain bleaches exhibit a strong smell.Click on the

There are only two naturally-occuring stable isotopes of iridium, the masses of which are listed in the table below. Use whatever data you need from the ALEKS Periodic Table to calculate the natural abundance of each isotope and complete the table. Be sure your answers have the correct number of significant digits. isotope mass (amu) natural

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

it correctly 1. Find the positive geometric mean of the given extremes. Show your solution. Given Geometric Mean 1. -3, -12 169 3. 25 1. Insert positive geometric means in each geometric sequence. Show your solution. 1 . 8 , , 216 2. 5, 1080

A catalyst has no effect on: (select all that apply) Select all that apply: value of an equilibrium constant rate of the forward reaction equilibrium concentrations rate of the reverse reaction

which energy level or levels can contain a p sublevel? n=2 or greater, n=1 only, n=1 and n=2, n=1 or greater

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

Classify the following elements as halogens, alkali metals, alkaline earth metals, or noble gases. Drag the appropriate elements to their respective bins. View Available Hint(s) for Part A ResetHelp I Ne Mg Br Rb Fr Halogens droppable Alkali metals droppable Alkaline earth metals droppable Noble gases droppable

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

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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